/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/dot-product.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:22:44,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:22:44,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:22:44,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:22:44,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 16:22:44,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 16:22:44,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 16:22:44,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 16:22:44,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 16:22:44,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 16:22:44,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 16:22:44,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 16:22:44,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 16:22:44,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 16:22:44,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 16:22:44,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 16:22:44,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 16:22:44,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:22:44,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:22:44,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:22:44,616 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 16:22:44,632 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:22:44,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:22:44,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:22:44,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:22:44,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:22:44,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:22:44,633 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:22:44,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:22:44,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:22:44,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:22:44,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:22:44,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:22:44,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:22:44,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:22:44,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:22:44,635 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:22:44,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:22:44,635 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:22:44,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:22:44,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:22:44,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:22:44,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:22:44,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:22:44,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:22:44,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:22:44,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:22:44,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:22:44,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:22:44,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:22:44,636 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:22:44,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:22:44,636 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:22:44,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:22:44,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:22:44,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:22:44,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:22:44,894 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:22:44,896 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:22:44,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl [2021-06-05 16:22:44,897 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product.wvr.bpl' [2021-06-05 16:22:44,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:22:44,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:22:44,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:22:44,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:22:44,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:22:44,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:22:44" (1/1) ... [2021-06-05 16:22:44,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:22:44" (1/1) ... [2021-06-05 16:22:44,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:22:44,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:22:44,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:22:44,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:22:44,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:22:44" (1/1) ... [2021-06-05 16:22:44,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:22:44" (1/1) ... [2021-06-05 16:22:44,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:22:44" (1/1) ... [2021-06-05 16:22:44,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:22:44" (1/1) ... [2021-06-05 16:22:44,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:22:44" (1/1) ... [2021-06-05 16:22:44,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:22:44" (1/1) ... [2021-06-05 16:22:44,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:22:44" (1/1) ... [2021-06-05 16:22:44,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:22:44,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:22:44,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:22:44,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:22:44,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:22:44" (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 16:22:45,022 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:22:45,022 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:22:45,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:22:45,022 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:22:45,023 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:22:45,023 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:22:45,023 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:22:45,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:22:45,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:22:45,023 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:22:45,023 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:22:45,023 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:22:45,024 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 16:22:45,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:22:45,175 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:22:45,177 INFO L202 PluginConnector]: Adding new model dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:22:45 BoogieIcfgContainer [2021-06-05 16:22:45,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:22:45,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:22:45,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:22:45,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:22:45,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:22:44" (1/2) ... [2021-06-05 16:22:45,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7adf95cb and model type dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:22:45, skipping insertion in model container [2021-06-05 16:22:45,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:22:45" (2/2) ... [2021-06-05 16:22:45,182 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product.wvr.bpl [2021-06-05 16:22:45,186 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:22:45,186 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:22:45,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:22:45,187 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:22:45,247 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:22:45,285 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:22:45,310 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:22:45,310 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:22:45,311 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:22:45,311 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:22:45,311 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:22:45,311 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:22:45,311 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:22:45,311 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:22:45,324 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 16:22:45,347 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 16:22:45,348 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 16:22:45,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:22:45,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:45,358 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 16:22:45,359 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:45,367 INFO L82 PathProgramCache]: Analyzing trace with hash 201148569, now seen corresponding path program 1 times [2021-06-05 16:22:45,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:45,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892952916] [2021-06-05 16:22:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:45,461 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 16:22:45,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:45,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892952916] [2021-06-05 16:22:45,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892952916] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:22:45,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:22:45,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:22:45,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257275107] [2021-06-05 16:22:45,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:22:45,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:45,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:22:45,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:22:45,475 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 16:22:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:45,509 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-05 16:22:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:22:45,510 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 16:22:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:45,518 INFO L225 Difference]: With dead ends: 217 [2021-06-05 16:22:45,518 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 16:22:45,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:22:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 16:22:45,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 16:22:45,549 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 16:22:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-05 16:22:45,552 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-05 16:22:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:45,552 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-05 16:22:45,553 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 16:22:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-05 16:22:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:22:45,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:45,554 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 16:22:45,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:22:45,555 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:45,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:45,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1603966247, now seen corresponding path program 1 times [2021-06-05 16:22:45,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:45,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299015968] [2021-06-05 16:22:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:45,593 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 16:22:45,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:45,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299015968] [2021-06-05 16:22:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299015968] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:22:45,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:22:45,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:22:45,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121071188] [2021-06-05 16:22:45,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:22:45,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:45,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:22:45,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:22:45,596 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 16:22:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:45,645 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-05 16:22:45,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:22:45,648 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 16:22:45,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:45,649 INFO L225 Difference]: With dead ends: 158 [2021-06-05 16:22:45,649 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 16:22:45,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:22:45,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 16:22:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-05 16:22:45,659 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 16:22:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 16:22:45,665 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-05 16:22:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:45,665 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 16:22:45,665 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 16:22:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 16:22:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:22:45,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:45,673 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 16:22:45,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:22:45,674 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:45,675 INFO L82 PathProgramCache]: Analyzing trace with hash -895359049, now seen corresponding path program 1 times [2021-06-05 16:22:45,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:45,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845563521] [2021-06-05 16:22:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:45,726 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 16:22:45,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:45,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845563521] [2021-06-05 16:22:45,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845563521] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:22:45,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:22:45,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:22:45,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43510246] [2021-06-05 16:22:45,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:22:45,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:45,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:22:45,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:22:45,729 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 16:22:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:45,770 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-05 16:22:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:22:45,773 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 16:22:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:45,774 INFO L225 Difference]: With dead ends: 183 [2021-06-05 16:22:45,774 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 16:22:45,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:22:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 16:22:45,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 16:22:45,784 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 16:22:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 16:22:45,785 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 16:22:45,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:45,786 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 16:22:45,786 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 16:22:45,786 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 16:22:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:22:45,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:45,787 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 16:22:45,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:22:45,787 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:45,787 INFO L82 PathProgramCache]: Analyzing trace with hash -443909641, now seen corresponding path program 1 times [2021-06-05 16:22:45,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:45,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766147240] [2021-06-05 16:22:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:46,062 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 16:22:46,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:46,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766147240] [2021-06-05 16:22:46,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766147240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:46,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451387339] [2021-06-05 16:22:46,063 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 16:22:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:46,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:22:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:46,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:22:46,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 16:22:46,378 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:22:46,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:46,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:22:46,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 16:22:46,392 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:22:46,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:46,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:22:46,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:22:46,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:46,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:22:46,415 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2021-06-05 16:22:46,455 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 16:22:46,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451387339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:46,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:46,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:22:46,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452336389] [2021-06-05 16:22:46,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:22:46,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:46,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:22:46,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:22:46,461 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) 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 16:22:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:46,629 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 16:22:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:22:46,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) 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 22 [2021-06-05 16:22:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:46,631 INFO L225 Difference]: With dead ends: 330 [2021-06-05 16:22:46,632 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 16:22:46,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:22:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 16:22:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 16:22:46,641 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 16:22:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 16:22:46,642 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 16:22:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:46,643 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 16:22:46,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) 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 16:22:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 16:22:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:22:46,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:46,644 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 16:22:46,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:46,845 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash -611718733, now seen corresponding path program 2 times [2021-06-05 16:22:46,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:46,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307434441] [2021-06-05 16:22:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:46,997 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 16:22:46,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:46,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307434441] [2021-06-05 16:22:46,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307434441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:46,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080488839] [2021-06-05 16:22:46,997 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) [2021-06-05 16:22:47,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:22:47,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:47,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:47,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:47,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-06-05 16:22:47,243 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:22:47,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:47,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:47,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-06-05 16:22:47,298 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:22:47,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:47,319 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:47,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 19 [2021-06-05 16:22:47,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:22:47,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:47,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:22:47,355 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-06-05 16:22:47,409 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 16:22:47,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080488839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:47,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:47,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 16:22:47,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952779853] [2021-06-05 16:22:47,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:22:47,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:47,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:22:47,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:22:47,412 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) 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 16:22:47,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:47,686 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 16:22:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:22:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) 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 22 [2021-06-05 16:22:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:47,688 INFO L225 Difference]: With dead ends: 374 [2021-06-05 16:22:47,688 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 16:22:47,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:22:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 16:22:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 16:22:47,695 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 16:22:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 16:22:47,696 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 16:22:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:47,696 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 16:22:47,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) 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 16:22:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 16:22:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:22:47,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:47,697 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 16:22:47,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:47,913 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash -312945285, now seen corresponding path program 3 times [2021-06-05 16:22:47,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:47,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040743998] [2021-06-05 16:22:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:48,006 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 16:22:48,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:48,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040743998] [2021-06-05 16:22:48,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040743998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:48,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709448698] [2021-06-05 16:22:48,007 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 16:22:48,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:22:48,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:48,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:22:48,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:48,119 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 23 treesize of output 19 [2021-06-05 16:22:48,121 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:22:48,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:48,127 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 19 treesize of output 15 [2021-06-05 16:22:48,129 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:22:48,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:48,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 16:22:48,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:22:48,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:48,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:22:48,142 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:31, output treesize:3 [2021-06-05 16:22:48,162 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 16:22:48,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709448698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:48,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:48,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:22:48,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971774342] [2021-06-05 16:22:48,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:22:48,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:48,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:22:48,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:22:48,163 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) 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 16:22:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:48,291 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-05 16:22:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:22:48,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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 22 [2021-06-05 16:22:48,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:48,293 INFO L225 Difference]: With dead ends: 363 [2021-06-05 16:22:48,293 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 16:22:48,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:22:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 16:22:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-05 16:22:48,303 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 16:22:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 16:22:48,304 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 16:22:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:48,304 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 16:22:48,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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 16:22:48,305 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 16:22:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:22:48,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:48,305 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 16:22:48,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 16:22:48,517 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1257880315, now seen corresponding path program 4 times [2021-06-05 16:22:48,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:48,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273439137] [2021-06-05 16:22:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:48,612 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 16:22:48,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:48,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273439137] [2021-06-05 16:22:48,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273439137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:48,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95858421] [2021-06-05 16:22:48,612 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 16:22:48,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:22:48,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:22:48,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:48,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:48,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-06-05 16:22:48,782 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:22:48,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:48,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:48,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-06-05 16:22:48,825 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:22:48,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:48,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:48,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 19 [2021-06-05 16:22:48,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:22:48,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:22:48,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:22:48,880 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:34, output treesize:19 [2021-06-05 16:22:48,921 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 16:22:48,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95858421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:48,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:48,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:22:48,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071919855] [2021-06-05 16:22:48,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:22:48,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:48,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:22:48,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:22:48,923 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 16:22:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:49,098 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 16:22:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:22:49,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 22 [2021-06-05 16:22:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:49,101 INFO L225 Difference]: With dead ends: 425 [2021-06-05 16:22:49,102 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 16:22:49,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:22:49,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 16:22:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 16:22:49,108 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 16:22:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 16:22:49,109 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 16:22:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:49,110 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 16:22:49,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 16:22:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 16:22:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:49,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:49,111 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 16:22:49,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:49,325 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:49,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1884155861, now seen corresponding path program 5 times [2021-06-05 16:22:49,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:49,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722948221] [2021-06-05 16:22:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:49,367 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 16:22:49,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:49,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722948221] [2021-06-05 16:22:49,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722948221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:49,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683245732] [2021-06-05 16:22:49,368 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 16:22:49,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:22:49,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:49,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:49,467 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 16:22:49,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683245732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:49,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:49,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:22:49,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126897110] [2021-06-05 16:22:49,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:22:49,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:49,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:22:49,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:22:49,468 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 16:22:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:49,751 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 16:22:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:22:49,751 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 16:22:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:49,754 INFO L225 Difference]: With dead ends: 619 [2021-06-05 16:22:49,754 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 16:22:49,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:22:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 16:22:49,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 16:22:49,761 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 16:22:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 16:22:49,762 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 16:22:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:49,763 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 16:22:49,763 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 16:22:49,763 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 16:22:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:49,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:49,764 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 16:22:49,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:49,970 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:49,970 INFO L82 PathProgramCache]: Analyzing trace with hash 907837017, now seen corresponding path program 6 times [2021-06-05 16:22:49,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:49,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188016639] [2021-06-05 16:22:49,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:50,005 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 16:22:50,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:50,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188016639] [2021-06-05 16:22:50,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188016639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:50,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439817429] [2021-06-05 16:22:50,005 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 16:22:50,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:22:50,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:50,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:50,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:50,136 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 16:22:50,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439817429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:50,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:50,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:22:50,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385864035] [2021-06-05 16:22:50,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:22:50,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:50,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:22:50,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:22:50,137 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 16:22:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:50,779 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 16:22:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:22:50,779 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 16:22:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:50,783 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 16:22:50,783 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 16:22:50,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:22:50,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 16:22:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 16:22:50,793 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 16:22:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 16:22:50,794 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 16:22:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:50,795 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 16:22:50,795 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 16:22:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 16:22:50,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:50,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:50,797 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 16:22:51,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:51,013 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1474789097, now seen corresponding path program 7 times [2021-06-05 16:22:51,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:51,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419825122] [2021-06-05 16:22:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:51,049 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 16:22:51,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:51,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419825122] [2021-06-05 16:22:51,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419825122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:51,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617282840] [2021-06-05 16:22:51,051 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 16:22:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:51,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:51,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:51,152 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 16:22:51,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617282840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:51,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:51,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:22:51,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96054117] [2021-06-05 16:22:51,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:22:51,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:22:51,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:22:51,155 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 16:22:51,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:51,708 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 16:22:51,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:22:51,709 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 16:22:51,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:51,712 INFO L225 Difference]: With dead ends: 951 [2021-06-05 16:22:51,712 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 16:22:51,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:22:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 16:22:51,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 16:22:51,721 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 16:22:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 16:22:51,721 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 16:22:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:51,722 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 16:22:51,722 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 16:22:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 16:22:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:51,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:51,722 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 16:22:51,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:51,933 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:51,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:51,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1884039527, now seen corresponding path program 1 times [2021-06-05 16:22:51,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:51,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020687777] [2021-06-05 16:22:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:51,967 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 16:22:51,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:51,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020687777] [2021-06-05 16:22:51,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020687777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:51,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371149843] [2021-06-05 16:22:51,967 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 16:22:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:52,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:22:52,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:52,110 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 16:22:52,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371149843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:52,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:52,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:22:52,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477706710] [2021-06-05 16:22:52,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:22:52,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:22:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:22:52,111 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 16:22:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:52,210 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 16:22:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:22:52,211 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 16:22:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:52,213 INFO L225 Difference]: With dead ends: 669 [2021-06-05 16:22:52,213 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 16:22:52,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:22:52,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 16:22:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 16:22:52,221 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 16:22:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 16:22:52,222 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 16:22:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:52,223 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 16:22:52,223 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 16:22:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 16:22:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:52,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:52,224 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 16:22:52,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 16:22:52,440 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:52,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1973959061, now seen corresponding path program 8 times [2021-06-05 16:22:52,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:52,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252896261] [2021-06-05 16:22:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:52,470 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 16:22:52,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:52,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252896261] [2021-06-05 16:22:52,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252896261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:52,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074134756] [2021-06-05 16:22:52,471 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 16:22:52,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:22:52,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:52,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:52,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:52,577 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 16:22:52,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074134756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:52,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:52,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:22:52,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027703088] [2021-06-05 16:22:52,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:22:52,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:52,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:22:52,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:22:52,579 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 16:22:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:52,734 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 16:22:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:22:52,734 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 16:22:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:52,736 INFO L225 Difference]: With dead ends: 710 [2021-06-05 16:22:52,736 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 16:22:52,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:22:52,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 16:22:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 16:22:52,745 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 16:22:52,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 16:22:52,747 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 16:22:52,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:52,747 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 16:22:52,747 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 16:22:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 16:22:52,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:52,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:52,748 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 16:22:52,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:52,961 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1268001729, now seen corresponding path program 2 times [2021-06-05 16:22:52,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:52,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148619752] [2021-06-05 16:22:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:52,981 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 16:22:52,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:52,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148619752] [2021-06-05 16:22:52,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148619752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:52,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133943843] [2021-06-05 16:22:52,982 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 16:22:53,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:22:53,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:53,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:22:53,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:53,071 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 16:22:53,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133943843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:53,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:53,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:22:53,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287960857] [2021-06-05 16:22:53,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:22:53,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:53,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:22:53,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:22:53,072 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 16:22:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:53,171 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 16:22:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:22:53,171 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 16:22:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:53,174 INFO L225 Difference]: With dead ends: 830 [2021-06-05 16:22:53,174 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 16:22:53,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:22:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 16:22:53,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 16:22:53,185 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 16:22:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 16:22:53,186 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 16:22:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:53,186 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 16:22:53,186 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 16:22:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 16:22:53,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:53,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:53,187 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 16:22:53,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:53,394 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:53,394 INFO L82 PathProgramCache]: Analyzing trace with hash -78679837, now seen corresponding path program 9 times [2021-06-05 16:22:53,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:53,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840430189] [2021-06-05 16:22:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:53,459 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 16:22:53,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:53,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840430189] [2021-06-05 16:22:53,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840430189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:53,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931293277] [2021-06-05 16:22:53,460 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 16:22:53,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:22:53,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:53,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:53,574 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 16:22:53,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931293277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:53,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:53,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:22:53,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706420769] [2021-06-05 16:22:53,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:22:53,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:53,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:22:53,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:22:53,576 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 16:22:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:53,840 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 16:22:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:22:53,840 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 16:22:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:53,845 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 16:22:53,845 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 16:22:53,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:22:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 16:22:53,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 16:22:53,859 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 16:22:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 16:22:53,861 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 16:22:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:53,861 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 16:22:53,861 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 16:22:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 16:22:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:53,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:53,863 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 16:22:54,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 16:22:54,080 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:54,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:54,080 INFO L82 PathProgramCache]: Analyzing trace with hash 706234257, now seen corresponding path program 10 times [2021-06-05 16:22:54,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:54,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591106823] [2021-06-05 16:22:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:54,111 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 16:22:54,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:54,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591106823] [2021-06-05 16:22:54,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591106823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:54,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259874858] [2021-06-05 16:22:54,112 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 16:22:54,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:22:54,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:54,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:54,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:54,198 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 16:22:54,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259874858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:54,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:54,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:22:54,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873681256] [2021-06-05 16:22:54,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:22:54,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:22:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:22:54,199 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 16:22:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:54,611 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 16:22:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:22:54,612 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 16:22:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:54,616 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 16:22:54,617 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 16:22:54,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:22:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 16:22:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 16:22:54,632 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 16:22:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 16:22:54,633 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 16:22:54,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:54,633 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 16:22:54,634 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 16:22:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 16:22:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:54,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:54,635 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 16:22:54,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 16:22:54,851 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:54,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:54,852 INFO L82 PathProgramCache]: Analyzing trace with hash -376788399, now seen corresponding path program 11 times [2021-06-05 16:22:54,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:54,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931285929] [2021-06-05 16:22:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:54,881 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 16:22:54,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:54,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931285929] [2021-06-05 16:22:54,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931285929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:54,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30311912] [2021-06-05 16:22:54,881 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 16:22:54,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:22:54,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:54,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:54,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:54,978 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 16:22:54,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30311912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:54,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:54,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:22:54,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017914083] [2021-06-05 16:22:54,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:22:54,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:54,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:22:54,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:22:54,979 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 16:22:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:55,262 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 16:22:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:22:55,262 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 16:22:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:55,266 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 16:22:55,266 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 16:22:55,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:22:55,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 16:22:55,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 16:22:55,280 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 16:22:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 16:22:55,282 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 16:22:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:55,282 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 16:22:55,282 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 16:22:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 16:22:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:55,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:55,284 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 16:22:55,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 16:22:55,500 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:55,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1094289719, now seen corresponding path program 12 times [2021-06-05 16:22:55,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:55,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333820641] [2021-06-05 16:22:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:55,532 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 16:22:55,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:55,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333820641] [2021-06-05 16:22:55,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333820641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:55,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313464551] [2021-06-05 16:22:55,533 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 16:22:55,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:22:55,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:55,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:55,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:55,632 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 16:22:55,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313464551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:55,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:55,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:22:55,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488716368] [2021-06-05 16:22:55,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:22:55,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:55,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:22:55,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:22:55,633 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 16:22:55,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:55,872 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 16:22:55,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:22:55,872 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 16:22:55,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:55,877 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 16:22:55,877 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 16:22:55,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:22:55,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 16:22:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 16:22:55,891 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 16:22:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 16:22:55,893 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 16:22:55,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:55,893 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 16:22:55,893 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 16:22:55,893 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 16:22:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:55,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:55,894 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 16:22:56,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:56,109 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:56,109 INFO L82 PathProgramCache]: Analyzing trace with hash 661413115, now seen corresponding path program 13 times [2021-06-05 16:22:56,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:56,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692649529] [2021-06-05 16:22:56,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:56,138 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 16:22:56,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:56,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692649529] [2021-06-05 16:22:56,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692649529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:56,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773876555] [2021-06-05 16:22:56,138 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 16:22:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:56,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:56,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:56,216 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 16:22:56,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773876555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:56,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:56,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:22:56,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965113230] [2021-06-05 16:22:56,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:22:56,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:56,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:22:56,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:22:56,217 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 16:22:56,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:56,534 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 16:22:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:22:56,534 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 16:22:56,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:56,540 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 16:22:56,540 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 16:22:56,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:22:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 16:22:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 16:22:56,556 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 16:22:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 16:22:56,558 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 16:22:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:56,558 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 16:22:56,558 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 16:22:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 16:22:56,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:56,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:56,560 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 16:22:56,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:56,777 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:56,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:56,777 INFO L82 PathProgramCache]: Analyzing trace with hash 389403925, now seen corresponding path program 14 times [2021-06-05 16:22:56,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:56,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811715678] [2021-06-05 16:22:56,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:56,806 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 16:22:56,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:56,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811715678] [2021-06-05 16:22:56,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811715678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:56,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783499256] [2021-06-05 16:22:56,806 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 16:22:56,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:22:56,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:56,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:56,905 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 16:22:56,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783499256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:56,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:56,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:22:56,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307195367] [2021-06-05 16:22:56,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:22:56,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:22:56,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:22:56,907 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 16:22:57,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:57,525 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 16:22:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:22:57,525 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 16:22:57,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:57,534 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 16:22:57,534 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 16:22:57,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 371.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:22:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 16:22:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 16:22:57,560 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 16:22:57,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 16:22:57,562 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 16:22:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:57,562 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 16:22:57,562 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 16:22:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 16:22:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:57,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:57,564 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 16:22:57,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:22:57,777 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:57,777 INFO L82 PathProgramCache]: Analyzing trace with hash 956356005, now seen corresponding path program 15 times [2021-06-05 16:22:57,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:57,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068254618] [2021-06-05 16:22:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:57,812 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 16:22:57,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:57,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068254618] [2021-06-05 16:22:57,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068254618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:57,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577949683] [2021-06-05 16:22:57,812 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 16:22:57,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:22:57,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:57,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:57,967 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 16:22:57,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577949683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:57,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:57,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:22:57,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14183541] [2021-06-05 16:22:57,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:22:57,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:57,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:22:57,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:22:57,968 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 16:22:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:58,594 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 16:22:58,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:22:58,594 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 16:22:58,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:58,600 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 16:22:58,600 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 16:22:58,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 391.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:22:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 16:22:58,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 16:22:58,623 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 16:22:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 16:22:58,624 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 16:22:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:58,624 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 16:22:58,625 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 16:22:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 16:22:58,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:58,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:58,626 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 16:22:58,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 16:22:58,842 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:58,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:58,842 INFO L82 PathProgramCache]: Analyzing trace with hash -215989853, now seen corresponding path program 16 times [2021-06-05 16:22:58,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:58,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475215336] [2021-06-05 16:22:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:58,870 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 16:22:58,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:58,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475215336] [2021-06-05 16:22:58,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475215336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:58,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135054402] [2021-06-05 16:22:58,870 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 16:22:58,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:22:58,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:58,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:58,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:58,972 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 16:22:58,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135054402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:58,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:58,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:22:58,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595152709] [2021-06-05 16:22:58,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:22:58,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:58,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:22:58,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:22:58,973 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 16:22:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:22:59,511 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 16:22:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:22:59,511 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 16:22:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:22:59,517 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 16:22:59,517 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 16:22:59,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:22:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 16:22:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 16:22:59,540 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 16:22:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 16:22:59,541 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 16:22:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:22:59,542 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 16:22:59,542 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 16:22:59,542 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 16:22:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:22:59,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:22:59,543 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 16:22:59,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 16:22:59,761 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:22:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:22:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash -134613765, now seen corresponding path program 17 times [2021-06-05 16:22:59,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:22:59,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60043857] [2021-06-05 16:22:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:22:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:22:59,794 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 16:22:59,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:22:59,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60043857] [2021-06-05 16:22:59,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60043857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:59,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334267351] [2021-06-05 16:22:59,795 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 16:22:59,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:22:59,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:22:59,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:22:59,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:22:59,874 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 16:22:59,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334267351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:22:59,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:22:59,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:22:59,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212654994] [2021-06-05 16:22:59,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:22:59,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:22:59,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:22:59,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:22:59,875 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 16:23:00,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:00,398 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 16:23:00,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:23:00,398 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 16:23:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:00,402 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 16:23:00,403 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 16:23:00,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:23:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 16:23:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 16:23:00,425 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 16:23:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 16:23:00,427 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 16:23:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:00,427 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 16:23:00,427 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 16:23:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 16:23:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:00,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:00,428 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 16:23:00,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:00,646 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:00,646 INFO L82 PathProgramCache]: Analyzing trace with hash 796043451, now seen corresponding path program 18 times [2021-06-05 16:23:00,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:00,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165435515] [2021-06-05 16:23:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:00,680 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 16:23:00,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:00,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165435515] [2021-06-05 16:23:00,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165435515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:00,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376600505] [2021-06-05 16:23:00,681 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) [2021-06-05 16:23:00,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:23:00,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:00,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:00,800 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 16:23:00,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376600505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:00,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:00,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:23:00,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756473199] [2021-06-05 16:23:00,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:23:00,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:00,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:23:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:23:00,802 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 16:23:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:01,371 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 16:23:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:23:01,371 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 16:23:01,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:01,376 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 16:23:01,376 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 16:23:01,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:23:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 16:23:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 16:23:01,395 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 16:23:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 16:23:01,397 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 16:23:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:01,397 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 16:23:01,397 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 16:23:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 16:23:01,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:01,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:01,399 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 16:23:01,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 16:23:01,615 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:01,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:01,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1855884691, now seen corresponding path program 19 times [2021-06-05 16:23:01,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:01,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469613749] [2021-06-05 16:23:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:01,668 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 16:23:01,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:01,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469613749] [2021-06-05 16:23:01,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469613749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:01,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834058503] [2021-06-05 16:23:01,668 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 16:23:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:01,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:01,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:01,800 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 16:23:01,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834058503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:01,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:01,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:23:01,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019682844] [2021-06-05 16:23:01,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:23:01,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:01,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:23:01,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:23:01,802 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 16:23:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:02,384 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 16:23:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:23:02,384 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 16:23:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:02,389 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 16:23:02,389 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 16:23:02,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 354.4ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:23:02,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 16:23:02,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 16:23:02,408 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 16:23:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 16:23:02,410 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 16:23:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:02,410 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 16:23:02,410 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 16:23:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 16:23:02,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:02,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:02,411 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 16:23:02,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 16:23:02,627 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:02,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1526797053, now seen corresponding path program 3 times [2021-06-05 16:23:02,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:02,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140645328] [2021-06-05 16:23:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:02,650 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 16:23:02,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:02,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140645328] [2021-06-05 16:23:02,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140645328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:02,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825818932] [2021-06-05 16:23:02,651 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 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 16:23:02,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:23:02,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:02,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:23:02,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:02,732 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 16:23:02,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825818932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:02,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:02,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:23:02,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667162196] [2021-06-05 16:23:02,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:23:02,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:02,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:23:02,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:23:02,733 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 16:23:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:02,801 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 16:23:02,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:23:02,801 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 16:23:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:02,803 INFO L225 Difference]: With dead ends: 929 [2021-06-05 16:23:02,803 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 16:23:02,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:23:02,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 16:23:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 16:23:02,825 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 16:23:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 16:23:02,827 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 16:23:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:02,827 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 16:23:02,827 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 16:23:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 16:23:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:02,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:02,829 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 16:23:03,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:03,046 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:03,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1837970499, now seen corresponding path program 20 times [2021-06-05 16:23:03,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:03,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990157882] [2021-06-05 16:23:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:03,079 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 16:23:03,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:03,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990157882] [2021-06-05 16:23:03,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990157882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:03,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791494019] [2021-06-05 16:23:03,080 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) [2021-06-05 16:23:03,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:23:03,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:03,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:03,156 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 16:23:03,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791494019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:03,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:03,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:23:03,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263373675] [2021-06-05 16:23:03,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:23:03,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:03,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:23:03,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:23:03,157 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 16:23:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:03,425 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 16:23:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:23:03,425 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 16:23:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:03,427 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 16:23:03,427 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 16:23:03,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:23:03,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 16:23:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 16:23:03,440 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 16:23:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 16:23:03,442 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 16:23:03,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:03,442 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 16:23:03,442 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 16:23:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 16:23:03,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:03,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:03,443 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 16:23:03,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 16:23:03,657 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash 64708953, now seen corresponding path program 21 times [2021-06-05 16:23:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:03,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270012729] [2021-06-05 16:23:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:23:03,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:03,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270012729] [2021-06-05 16:23:03,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270012729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:03,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527535621] [2021-06-05 16:23:03,681 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 16:23:03,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:23:03,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:03,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:03,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:03,745 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 16:23:03,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527535621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:03,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:03,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:23:03,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342718120] [2021-06-05 16:23:03,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:23:03,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:03,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:23:03,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:23:03,749 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 16:23:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:03,981 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 16:23:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:23:03,982 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 16:23:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:03,985 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 16:23:03,985 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 16:23:03,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:23:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 16:23:03,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 16:23:04,000 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 16:23:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 16:23:04,001 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 16:23:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:04,002 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 16:23:04,002 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 16:23:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 16:23:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:04,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:04,003 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 16:23:04,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:04,213 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:04,213 INFO L82 PathProgramCache]: Analyzing trace with hash 19887811, now seen corresponding path program 22 times [2021-06-05 16:23:04,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:04,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281489324] [2021-06-05 16:23:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:04,235 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 16:23:04,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:04,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281489324] [2021-06-05 16:23:04,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281489324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:04,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483113439] [2021-06-05 16:23:04,236 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 16:23:04,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:23:04,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:04,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:04,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:04,328 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 16:23:04,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483113439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:04,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:04,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:23:04,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050666751] [2021-06-05 16:23:04,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:23:04,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:04,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:23:04,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:23:04,329 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 16:23:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:04,506 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 16:23:04,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:23:04,521 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 16:23:04,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:04,523 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 16:23:04,523 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 16:23:04,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:23:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 16:23:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 16:23:04,538 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 16:23:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 16:23:04,540 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 16:23:04,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:04,540 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 16:23:04,540 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 16:23:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 16:23:04,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:04,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:04,541 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 16:23:04,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 16:23:04,758 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:04,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:04,758 INFO L82 PathProgramCache]: Analyzing trace with hash 617224469, now seen corresponding path program 23 times [2021-06-05 16:23:04,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:04,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029677068] [2021-06-05 16:23:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:04,786 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 16:23:04,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:04,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029677068] [2021-06-05 16:23:04,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029677068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:04,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240137469] [2021-06-05 16:23:04,787 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 16:23:04,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:23:04,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:04,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:04,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:04,900 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 16:23:04,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240137469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:04,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:04,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:23:04,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152998633] [2021-06-05 16:23:04,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:23:04,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:04,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:23:04,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:23:04,901 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 16:23:05,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:05,099 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 16:23:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:23:05,099 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 16:23:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:05,101 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 16:23:05,101 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 16:23:05,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:23:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 16:23:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 16:23:05,121 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 16:23:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 16:23:05,123 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 16:23:05,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:05,123 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 16:23:05,123 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 16:23:05,123 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 16:23:05,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:05,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:05,124 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 16:23:05,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:05,338 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:05,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:05,338 INFO L82 PathProgramCache]: Analyzing trace with hash 90804185, now seen corresponding path program 24 times [2021-06-05 16:23:05,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:05,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318635129] [2021-06-05 16:23:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:05,366 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 16:23:05,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:05,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318635129] [2021-06-05 16:23:05,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318635129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:05,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346231406] [2021-06-05 16:23:05,367 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 16:23:05,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:23:05,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:05,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:05,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:05,479 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 16:23:05,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346231406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:05,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:05,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:23:05,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265918205] [2021-06-05 16:23:05,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:23:05,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:05,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:23:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:23:05,481 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 16:23:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:05,910 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 16:23:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:23:05,911 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 16:23:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:05,914 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 16:23:05,914 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 16:23:05,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:23:05,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 16:23:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 16:23:05,930 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 16:23:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 16:23:05,932 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 16:23:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:05,932 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 16:23:05,932 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 16:23:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 16:23:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:05,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:05,934 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 16:23:06,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 16:23:06,138 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:06,139 INFO L82 PathProgramCache]: Analyzing trace with hash 657756265, now seen corresponding path program 25 times [2021-06-05 16:23:06,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:06,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618256739] [2021-06-05 16:23:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:06,179 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 16:23:06,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:06,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618256739] [2021-06-05 16:23:06,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618256739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:06,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598535669] [2021-06-05 16:23:06,179 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 16:23:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:06,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:06,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:06,270 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 16:23:06,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598535669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:06,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:06,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:23:06,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107372115] [2021-06-05 16:23:06,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:23:06,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:06,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:23:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:23:06,271 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 16:23:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:06,682 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 16:23:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:23:06,683 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 16:23:06,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:06,685 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 16:23:06,686 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 16:23:06,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 266.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:23:06,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 16:23:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 16:23:06,701 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 16:23:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:23:06,703 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:23:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:06,703 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:23:06,703 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 16:23:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:23:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:06,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:06,705 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 16:23:06,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:06,906 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:06,906 INFO L82 PathProgramCache]: Analyzing trace with hash -514589593, now seen corresponding path program 26 times [2021-06-05 16:23:06,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:06,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065471324] [2021-06-05 16:23:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:06,935 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 16:23:06,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:06,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065471324] [2021-06-05 16:23:06,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065471324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:06,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402984940] [2021-06-05 16:23:06,935 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 16:23:06,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:23:06,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:06,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:06,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:07,014 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 16:23:07,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402984940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:07,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:07,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:23:07,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453018406] [2021-06-05 16:23:07,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:23:07,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:23:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:23:07,015 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 16:23:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:07,377 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 16:23:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:23:07,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:23:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:07,382 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 16:23:07,382 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 16:23:07,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:23:07,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 16:23:07,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 16:23:07,414 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 16:23:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:23:07,416 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:23:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:07,416 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:23:07,416 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 16:23:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:23:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:07,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:07,417 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 16:23:07,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 16:23:07,623 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:07,623 INFO L82 PathProgramCache]: Analyzing trace with hash -433213505, now seen corresponding path program 27 times [2021-06-05 16:23:07,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:07,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507931268] [2021-06-05 16:23:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:07,649 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 16:23:07,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:07,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507931268] [2021-06-05 16:23:07,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507931268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:07,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267108355] [2021-06-05 16:23:07,650 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 16:23:07,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:23:07,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:07,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:07,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:07,730 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 16:23:07,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267108355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:07,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:07,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:23:07,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176885675] [2021-06-05 16:23:07,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:23:07,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:07,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:23:07,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:23:07,731 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 16:23:08,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:08,054 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 16:23:08,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:23:08,057 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 16:23:08,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:08,060 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 16:23:08,060 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 16:23:08,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:23:08,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 16:23:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 16:23:08,075 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 16:23:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:23:08,089 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:23:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:08,089 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:23:08,089 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 16:23:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:23:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:08,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:08,091 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 16:23:08,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:08,305 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:08,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:08,305 INFO L82 PathProgramCache]: Analyzing trace with hash 497443711, now seen corresponding path program 28 times [2021-06-05 16:23:08,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:08,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458817811] [2021-06-05 16:23:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:08,330 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 16:23:08,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:08,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458817811] [2021-06-05 16:23:08,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458817811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:08,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600744394] [2021-06-05 16:23:08,331 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 16:23:08,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:23:08,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:08,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:08,447 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 16:23:08,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600744394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:08,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:08,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:23:08,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202369479] [2021-06-05 16:23:08,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:23:08,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:23:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:23:08,449 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 16:23:08,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:08,779 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 16:23:08,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:23:08,779 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 16:23:08,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:08,782 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 16:23:08,782 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 16:23:08,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:23:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 16:23:08,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 16:23:08,798 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 16:23:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:23:08,800 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:23:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:08,800 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:23:08,800 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 16:23:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:23:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:08,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:08,802 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 16:23:09,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 16:23:09,008 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:09,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:09,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2140482865, now seen corresponding path program 29 times [2021-06-05 16:23:09,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:09,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558161279] [2021-06-05 16:23:09,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:09,037 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 16:23:09,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:09,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558161279] [2021-06-05 16:23:09,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558161279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:09,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710946804] [2021-06-05 16:23:09,037 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 16:23:09,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:23:09,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:09,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:09,125 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 16:23:09,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710946804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:09,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:09,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:23:09,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481760834] [2021-06-05 16:23:09,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:23:09,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:09,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:23:09,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:23:09,127 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 16:23:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:09,467 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 16:23:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:23:09,468 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 16:23:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:09,470 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 16:23:09,470 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 16:23:09,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:23:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 16:23:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 16:23:09,485 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 16:23:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:23:09,487 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:23:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:09,487 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:23:09,487 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 16:23:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:23:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:09,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:09,489 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 16:23:09,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 16:23:09,704 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:09,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1151056447, now seen corresponding path program 30 times [2021-06-05 16:23:09,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:09,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153282232] [2021-06-05 16:23:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:09,732 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 16:23:09,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:09,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153282232] [2021-06-05 16:23:09,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153282232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:09,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288014523] [2021-06-05 16:23:09,733 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 16:23:09,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:23:09,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:09,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:09,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:09,842 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 16:23:09,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288014523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:09,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:09,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:23:09,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851862487] [2021-06-05 16:23:09,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:23:09,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:09,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:23:09,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:23:09,843 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 16:23:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:10,155 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 16:23:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:23:10,155 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 16:23:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:10,158 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 16:23:10,158 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 16:23:10,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:23:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 16:23:10,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 16:23:10,173 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 16:23:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 16:23:10,175 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 16:23:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:10,175 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 16:23:10,175 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 16:23:10,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 16:23:10,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:10,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:10,177 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 16:23:10,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 16:23:10,392 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:10,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:10,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1069680359, now seen corresponding path program 31 times [2021-06-05 16:23:10,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:10,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081136275] [2021-06-05 16:23:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:10,418 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 16:23:10,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:10,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081136275] [2021-06-05 16:23:10,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081136275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:10,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839039913] [2021-06-05 16:23:10,419 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 16:23:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:10,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:10,487 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 16:23:10,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839039913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:10,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:10,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:23:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462569013] [2021-06-05 16:23:10,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:23:10,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:10,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:23:10,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:23:10,488 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 16:23:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:10,720 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 16:23:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:23:10,720 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 16:23:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:10,722 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 16:23:10,722 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 16:23:10,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:23:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 16:23:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 16:23:10,737 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 16:23:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 16:23:10,739 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 16:23:10,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:10,739 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 16:23:10,739 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 16:23:10,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 16:23:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:10,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:10,741 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 16:23:10,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 16:23:10,957 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:10,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:10,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1710194965, now seen corresponding path program 32 times [2021-06-05 16:23:10,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:10,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259093149] [2021-06-05 16:23:10,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:10,982 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 16:23:10,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:10,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259093149] [2021-06-05 16:23:10,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259093149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:10,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109866370] [2021-06-05 16:23:10,982 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 16:23:11,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:23:11,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:11,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:11,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:11,050 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 16:23:11,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109866370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:11,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:11,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:23:11,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386956430] [2021-06-05 16:23:11,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:23:11,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:11,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:23:11,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:23:11,051 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 16:23:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:11,246 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 16:23:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:23:11,246 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 16:23:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:11,248 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 16:23:11,248 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 16:23:11,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:23:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 16:23:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 16:23:11,269 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 16:23:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 16:23:11,271 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 16:23:11,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:11,271 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 16:23:11,271 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 16:23:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 16:23:11,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:11,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:11,272 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 16:23:11,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:11,485 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:11,485 INFO L82 PathProgramCache]: Analyzing trace with hash -987645615, now seen corresponding path program 33 times [2021-06-05 16:23:11,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:11,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050110937] [2021-06-05 16:23:11,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:11,514 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 16:23:11,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:11,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050110937] [2021-06-05 16:23:11,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050110937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:11,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555852523] [2021-06-05 16:23:11,514 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 16:23:11,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:23:11,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:11,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:11,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:11,618 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 16:23:11,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555852523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:11,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:11,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:23:11,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588988118] [2021-06-05 16:23:11,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:23:11,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:11,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:23:11,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:23:11,619 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 16:23:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:11,908 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 16:23:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:23:11,909 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 16:23:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:11,911 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 16:23:11,911 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 16:23:11,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:23:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 16:23:11,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 16:23:11,927 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 16:23:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 16:23:11,929 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 16:23:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:11,929 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 16:23:11,929 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 16:23:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 16:23:11,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:11,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:11,931 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 16:23:12,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:12,145 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:12,145 INFO L82 PathProgramCache]: Analyzing trace with hash 655393539, now seen corresponding path program 34 times [2021-06-05 16:23:12,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:12,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970970996] [2021-06-05 16:23:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:12,172 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 16:23:12,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:12,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970970996] [2021-06-05 16:23:12,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970970996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:12,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591473410] [2021-06-05 16:23:12,173 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 16:23:12,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:23:12,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:12,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:12,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:12,255 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 16:23:12,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591473410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:12,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:12,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:23:12,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763517570] [2021-06-05 16:23:12,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:23:12,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:12,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:23:12,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:23:12,256 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 16:23:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:12,493 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 16:23:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:23:12,494 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 16:23:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:12,496 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:23:12,496 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 16:23:12,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:23:12,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 16:23:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 16:23:12,510 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 16:23:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 16:23:12,512 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 16:23:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:12,512 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 16:23:12,512 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 16:23:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 16:23:12,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:23:12,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:12,514 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 16:23:12,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 16:23:12,730 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:12,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:12,730 INFO L82 PathProgramCache]: Analyzing trace with hash -612063639, now seen corresponding path program 35 times [2021-06-05 16:23:12,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:12,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160425211] [2021-06-05 16:23:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:12,756 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 16:23:12,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:12,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160425211] [2021-06-05 16:23:12,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160425211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:12,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700894489] [2021-06-05 16:23:12,757 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 16:23:12,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:23:12,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:12,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:23:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:12,831 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 16:23:12,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700894489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:12,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:12,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:23:12,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306781866] [2021-06-05 16:23:12,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:23:12,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:12,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:23:12,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:23:12,832 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 16:23:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:12,987 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 16:23:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:23:12,987 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 16:23:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:12,989 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 16:23:12,989 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 16:23:12,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:23:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 16:23:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 16:23:13,002 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 16:23:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 16:23:13,004 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 16:23:13,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:13,004 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 16:23:13,004 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 16:23:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 16:23:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:23:13,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:13,006 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 16:23:13,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:13,207 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2003913975, now seen corresponding path program 4 times [2021-06-05 16:23:13,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:13,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698089708] [2021-06-05 16:23:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:13,390 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 16:23:13,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:13,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698089708] [2021-06-05 16:23:13,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698089708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:13,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821874055] [2021-06-05 16:23:13,391 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 16:23:13,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:23:13,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:13,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:23:13,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:13,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:13,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:23:13,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:23:13,590 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:13,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:13,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:13,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:23:13,598 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:23:13,600 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:13,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:13,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:13,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:23:13,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:23:13,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:13,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:23:13,622 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:23:13,639 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 16:23:13,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821874055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:13,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:13,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:23:13,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86850267] [2021-06-05 16:23:13,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:23:13,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:13,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:23:13,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:23:13,640 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:23:14,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:14,122 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 16:23:14,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:23:14,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:23:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:14,125 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 16:23:14,125 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 16:23:14,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:23:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 16:23:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 16:23:14,137 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 16:23:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 16:23:14,139 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 16:23:14,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:14,139 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 16:23:14,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:23:14,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 16:23:14,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:23:14,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:14,141 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 16:23:14,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:14,342 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:14,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:14,342 INFO L82 PathProgramCache]: Analyzing trace with hash -24484041, now seen corresponding path program 5 times [2021-06-05 16:23:14,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:14,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014555644] [2021-06-05 16:23:14,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:14,621 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 16:23:14,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:14,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014555644] [2021-06-05 16:23:14,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014555644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:14,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203409520] [2021-06-05 16:23:14,622 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 16:23:14,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:23:14,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:23:14,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:14,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:14,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:23:14,806 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:23:14,808 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:14,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:14,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:14,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:23:14,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:23:14,818 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:14,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:14,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:14,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:23:14,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:23:14,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:14,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:23:14,852 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:23:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:23:14,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203409520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:14,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:14,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:23:14,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596679459] [2021-06-05 16:23:14,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:23:14,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:14,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:23:14,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:23:14,870 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:23:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:15,384 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-06-05 16:23:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:23:15,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 16:23:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:15,387 INFO L225 Difference]: With dead ends: 1495 [2021-06-05 16:23:15,387 INFO L226 Difference]: Without dead ends: 1480 [2021-06-05 16:23:15,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 486.5ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:23:15,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-05 16:23:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-06-05 16:23:15,399 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 16:23:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 16:23:15,401 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 16:23:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:15,401 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 16:23:15,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:23:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 16:23:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:23:15,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:15,403 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 16:23:15,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:15,604 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1566945267, now seen corresponding path program 36 times [2021-06-05 16:23:15,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:15,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525475750] [2021-06-05 16:23:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:15,907 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 16:23:15,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:15,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525475750] [2021-06-05 16:23:15,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525475750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:15,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133136535] [2021-06-05 16:23:15,908 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 16:23:15,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:23:15,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:15,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:23:15,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:16,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:16,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:23:16,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:16,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:23:16,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 37 [2021-06-05 16:23:16,121 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:16,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:16,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:16,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:16,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:23:16,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:23:16,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 27 [2021-06-05 16:23:16,133 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:16,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:16,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:16,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:23:16,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:23:16,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:16,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:23:16,159 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:23:16,172 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 16:23:16,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133136535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:16,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:16,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:23:16,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471915694] [2021-06-05 16:23:16,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:23:16,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:16,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:23:16,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:23:16,173 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 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 16:23:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:17,842 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-06-05 16:23:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:23:17,842 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 16:23:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:17,845 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 16:23:17,845 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 16:23:17,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1532.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:23:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 16:23:17,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-06-05 16:23:17,861 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 16:23:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 16:23:17,863 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 16:23:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:17,863 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 16:23:17,863 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 16:23:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 16:23:17,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:23:17,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:17,865 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 16:23:18,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 16:23:18,065 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:18,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:18,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1922974853, now seen corresponding path program 6 times [2021-06-05 16:23:18,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:18,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63794966] [2021-06-05 16:23:18,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:18,259 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 16:23:18,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:18,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63794966] [2021-06-05 16:23:18,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63794966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:18,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809744256] [2021-06-05 16:23:18,259 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 16:23:18,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:23:18,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:18,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:23:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:18,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:18,417 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:18,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 43 [2021-06-05 16:23:18,438 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:18,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:18,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:18,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:18,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:23:18,477 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:18,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:18,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:18,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:23:18,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:23:18,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:18,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:23:18,593 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 16:23:18,639 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 16:23:18,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809744256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:18,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:18,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:23:18,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801786776] [2021-06-05 16:23:18,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:23:18,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:18,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:23:18,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:23:18,640 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) 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 16:23:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:20,090 INFO L93 Difference]: Finished difference Result 1879 states and 5975 transitions. [2021-06-05 16:23:20,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:23:20,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:23:20,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:20,093 INFO L225 Difference]: With dead ends: 1879 [2021-06-05 16:23:20,093 INFO L226 Difference]: Without dead ends: 1864 [2021-06-05 16:23:20,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1120.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:23:20,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-06-05 16:23:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1198. [2021-06-05 16:23:20,107 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 16:23:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-05 16:23:20,109 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-05 16:23:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:20,109 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-05 16:23:20,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:23:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-05 16:23:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:23:20,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:20,110 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 16:23:20,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:20,325 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:20,325 INFO L82 PathProgramCache]: Analyzing trace with hash -372593289, now seen corresponding path program 37 times [2021-06-05 16:23:20,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:20,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372268403] [2021-06-05 16:23:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:20,591 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 16:23:20,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:20,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372268403] [2021-06-05 16:23:20,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372268403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:20,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963935706] [2021-06-05 16:23:20,592 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 16:23:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:20,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:23:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:20,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:20,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:20,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:20,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 16:23:20,891 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:20,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:20,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:20,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:23:20,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:20,927 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 53 [2021-06-05 16:23:21,022 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:21,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:21,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:21,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:23:21,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:23:21,919 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 131 [2021-06-05 16:23:21,920 INFO L628 ElimStorePlain]: treesize reduction 164, result has 91.1 percent of original size [2021-06-05 16:23:22,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:23:22,291 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:102 [2021-06-05 16:23:22,341 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 16:23:22,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963935706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:22,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:22,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:23:22,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334504451] [2021-06-05 16:23:22,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:23:22,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:22,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:23:22,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:23:22,342 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 20 states, 20 states have (on average 2.4) 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 16:23:22,859 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 16:23:23,615 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 16:23:24,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:23:24,249 INFO L93 Difference]: Finished difference Result 1814 states and 5791 transitions. [2021-06-05 16:23:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:23:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) 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 16:23:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:23:24,252 INFO L225 Difference]: With dead ends: 1814 [2021-06-05 16:23:24,252 INFO L226 Difference]: Without dead ends: 1799 [2021-06-05 16:23:24,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1793.1ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:23:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-06-05 16:23:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1206. [2021-06-05 16:23:24,265 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 16:23:24,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-05 16:23:24,267 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-05 16:23:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:23:24,267 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-05 16:23:24,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) 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 16:23:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-05 16:23:24,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:23:24,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:23:24,269 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 16:23:24,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:23:24,470 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:23:24,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:23:24,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1348912133, now seen corresponding path program 38 times [2021-06-05 16:23:24,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:23:24,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491687804] [2021-06-05 16:23:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:23:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:23:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:23:24,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:23:24,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491687804] [2021-06-05 16:23:24,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491687804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:24,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182957155] [2021-06-05 16:23:24,672 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 16:23:24,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:23:24,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:23:24,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:23:24,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:23:27,049 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 16:23:27,958 WARN L205 SmtUtils]: Spent 863.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-05 16:23:28,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:28,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 83 [2021-06-05 16:23:28,691 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:28,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:28,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:28,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 75 [2021-06-05 16:23:29,397 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:23:29,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:29,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:23:29,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:23:29,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:23:30,611 WARN L205 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 145 [2021-06-05 16:23:30,612 INFO L628 ElimStorePlain]: treesize reduction 536, result has 75.4 percent of original size [2021-06-05 16:23:31,428 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 227 [2021-06-05 16:23:32,815 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 205 [2021-06-05 16:23:32,970 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 205 [2021-06-05 16:23:33,150 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 213 [2021-06-05 16:23:34,007 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 211 [2021-06-05 16:23:34,146 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 211 [2021-06-05 16:23:34,304 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 221 [2021-06-05 16:23:34,617 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 296 [2021-06-05 16:23:35,555 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 263 [2021-06-05 16:23:35,664 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 263 [2021-06-05 16:23:37,011 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 469 [2021-06-05 16:23:37,475 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 469 [2021-06-05 16:23:38,063 WARN L205 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 502 [2021-06-05 16:23:38,213 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 318 [2021-06-05 16:23:38,667 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 196 [2021-06-05 16:23:39,079 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 295 [2021-06-05 16:23:39,801 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 447 [2021-06-05 16:23:40,430 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 447 [2021-06-05 16:23:41,894 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 511 DAG size of output: 493 [2021-06-05 16:23:42,455 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 399 [2021-06-05 16:23:43,120 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 365 [2021-06-05 16:23:43,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:23:43,126 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:14812 [2021-06-05 16:23:43,801 WARN L205 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 365 [2021-06-05 16:23:44,135 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-05 16:23:44,468 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-05 16:23:44,798 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-05 16:23:45,933 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 359 DAG size of output: 57 [2021-06-05 16:23:46,063 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 16:23:46,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182957155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:23:46,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:23:46,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 16:23:46,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746030979] [2021-06-05 16:23:46,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:23:46,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:23:46,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:23:46,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=431, Unknown=1, NotChecked=0, Total=506 [2021-06-05 16:23:46,064 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 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 16:24:03,166 WARN L205 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 16:24:33,459 WARN L205 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 109 DAG size of output: 59 [2021-06-05 16:24:35,649 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 16:24:42,661 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2021-06-05 16:24:45,185 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:24:47,241 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:24:47,527 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 16:24:48,759 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-05 16:24:48,906 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-06-05 16:24:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:24:49,002 INFO L93 Difference]: Finished difference Result 2289 states and 7148 transitions. [2021-06-05 16:24:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:24:49,004 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 16:24:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:24:49,007 INFO L225 Difference]: With dead ends: 2289 [2021-06-05 16:24:49,007 INFO L226 Difference]: Without dead ends: 2259 [2021-06-05 16:24:49,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 26742.1ms TimeCoverageRelationStatistics Valid=438, Invalid=2632, Unknown=10, NotChecked=0, Total=3080 [2021-06-05 16:24:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-06-05 16:24:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1219. [2021-06-05 16:24:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:24:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-06-05 16:24:49,027 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-06-05 16:24:49,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:24:49,027 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-06-05 16:24:49,027 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 16:24:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-06-05 16:24:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:24:49,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:24:49,029 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 16:24:49,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 16:24:49,230 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:24:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:24:49,230 INFO L82 PathProgramCache]: Analyzing trace with hash 860987935, now seen corresponding path program 7 times [2021-06-05 16:24:49,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:24:49,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254568763] [2021-06-05 16:24:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:24:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:24:49,417 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 16:24:49,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:24:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254568763] [2021-06-05 16:24:49,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254568763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746092843] [2021-06-05 16:24:49,417 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 16:24:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:24:49,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:24:49,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:24:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:24:49,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:24:49,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:24:49,591 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:49,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:49,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:24:49,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:24:49,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:24:49,601 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:49,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:49,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:49,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:24:49,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:24:49,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:49,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:24:49,625 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:24:49,638 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 16:24:49,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746092843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:49,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:24:49,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:24:49,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349608180] [2021-06-05 16:24:49,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:24:49,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:24:49,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:24:49,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:24:49,639 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:24:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:24:50,208 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-06-05 16:24:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:24:50,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:24:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:24:50,210 INFO L225 Difference]: With dead ends: 1622 [2021-06-05 16:24:50,211 INFO L226 Difference]: Without dead ends: 1607 [2021-06-05 16:24:50,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 549.7ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:24:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-05 16:24:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-06-05 16:24:50,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:24:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-06-05 16:24:50,227 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-06-05 16:24:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:24:50,227 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-06-05 16:24:50,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:24:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-06-05 16:24:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:24:50,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:24:50,229 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, 1, 1] [2021-06-05 16:24:50,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1667,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:24:50,444 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:24:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:24:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1167410081, now seen corresponding path program 8 times [2021-06-05 16:24:50,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:24:50,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992853871] [2021-06-05 16:24:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:24:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:24:50,603 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 16:24:50,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:24:50,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992853871] [2021-06-05 16:24:50,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992853871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:50,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867814814] [2021-06-05 16:24:50,604 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 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 16:24:50,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:24:50,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:24:50,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:24:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:24:50,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:50,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 51 [2021-06-05 16:24:50,839 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:50,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:50,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:50,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:24:50,905 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:50,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:50,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:50,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:24:50,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:24:51,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:51,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:24:51,058 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:102 [2021-06-05 16:24:51,116 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 16:24:51,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867814814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:51,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:24:51,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:24:51,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614912726] [2021-06-05 16:24:51,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:24:51,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:24:51,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:24:51,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:24:51,117 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:24:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:24:52,088 INFO L93 Difference]: Finished difference Result 1684 states and 5459 transitions. [2021-06-05 16:24:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:24:52,089 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:24:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:24:52,091 INFO L225 Difference]: With dead ends: 1684 [2021-06-05 16:24:52,091 INFO L226 Difference]: Without dead ends: 1669 [2021-06-05 16:24:52,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 865.1ms TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:24:52,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-06-05 16:24:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1233. [2021-06-05 16:24:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 3.3490259740259742) internal successors, (4126), 1232 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:24:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4126 transitions. [2021-06-05 16:24:52,115 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4126 transitions. Word has length 26 [2021-06-05 16:24:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:24:52,116 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 4126 transitions. [2021-06-05 16:24:52,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:24:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4126 transitions. [2021-06-05 16:24:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:24:52,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:24:52,117 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 16:24:52,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1668 [2021-06-05 16:24:52,318 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:24:52,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:24:52,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1190147507, now seen corresponding path program 9 times [2021-06-05 16:24:52,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:24:52,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698294717] [2021-06-05 16:24:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:24:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:24:52,454 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 16:24:52,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:24:52,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698294717] [2021-06-05 16:24:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698294717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588299984] [2021-06-05 16:24:52,455 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 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 16:24:52,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:24:52,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:24:52,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:24:52,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:24:52,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:24:52,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:24:52,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:24:52,700 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:52,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:52,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:24:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:24:52,710 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:24:52,712 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:52,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:52,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:52,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:24:52,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:24:52,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:52,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:24:52,737 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:52, output treesize:3 [2021-06-05 16:24:52,750 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 16:24:52,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588299984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:52,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:24:52,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:24:52,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899501226] [2021-06-05 16:24:52,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:24:52,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:24:52,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:24:52,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:24:52,751 INFO L87 Difference]: Start difference. First operand 1233 states and 4126 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:24:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:24:54,850 INFO L93 Difference]: Finished difference Result 1868 states and 6059 transitions. [2021-06-05 16:24:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:24:54,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:24:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:24:54,854 INFO L225 Difference]: With dead ends: 1868 [2021-06-05 16:24:54,854 INFO L226 Difference]: Without dead ends: 1853 [2021-06-05 16:24:54,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 625.0ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:24:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-05 16:24:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1242. [2021-06-05 16:24:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.353746978243352) internal successors, (4162), 1241 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:24:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4162 transitions. [2021-06-05 16:24:54,871 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4162 transitions. Word has length 26 [2021-06-05 16:24:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:24:54,871 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4162 transitions. [2021-06-05 16:24:54,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:24:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4162 transitions. [2021-06-05 16:24:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:24:54,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:24:54,873 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 16:24:55,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:24:55,073 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:24:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:24:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1022338415, now seen corresponding path program 10 times [2021-06-05 16:24:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:24:55,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188111576] [2021-06-05 16:24:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:24:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:24:55,257 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 16:24:55,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:24:55,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188111576] [2021-06-05 16:24:55,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188111576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:55,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187593795] [2021-06-05 16:24:55,258 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 16:24:55,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:24:55,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:24:55,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:24:55,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:24:55,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:24:55,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:24:55,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:24:55,414 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:55,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:24:55,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:24:55,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:24:55,425 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:55,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:55,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:55,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:24:55,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:24:55,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:55,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:24:55,449 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:24:55,465 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 16:24:55,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187593795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:55,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:24:55,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:24:55,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961657439] [2021-06-05 16:24:55,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:24:55,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:24:55,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:24:55,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:24:55,466 INFO L87 Difference]: Start difference. First operand 1242 states and 4162 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 16:24:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:24:55,841 INFO L93 Difference]: Finished difference Result 1549 states and 5097 transitions. [2021-06-05 16:24:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:24:55,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-05 16:24:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:24:55,843 INFO L225 Difference]: With dead ends: 1549 [2021-06-05 16:24:55,843 INFO L226 Difference]: Without dead ends: 1534 [2021-06-05 16:24:55,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:24:55,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-05 16:24:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1238. [2021-06-05 16:24:55,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:24:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-05 16:24:55,865 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-05 16:24:55,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:24:55,865 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-05 16:24:55,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 16:24:55,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-05 16:24:55,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:24:55,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:24:55,866 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 16:24:56,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:24:56,067 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:24:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:24:56,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1045177613, now seen corresponding path program 11 times [2021-06-05 16:24:56,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:24:56,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040392574] [2021-06-05 16:24:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:24:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:24:56,223 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 16:24:56,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:24:56,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040392574] [2021-06-05 16:24:56,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040392574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:56,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143540491] [2021-06-05 16:24:56,224 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 16:24:56,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:24:56,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:24:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:24:56,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:24:56,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:24:56,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:56,376 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 43 treesize of output 43 [2021-06-05 16:24:56,415 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:56,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:56,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:24:56,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:56,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:24:56,448 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:56,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:56,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:56,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:24:56,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:24:56,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:56,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:24:56,530 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:15 [2021-06-05 16:24:56,566 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 16:24:56,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143540491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:56,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:24:56,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:24:56,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062889369] [2021-06-05 16:24:56,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:24:56,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:24:56,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:24:56,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:24:56,567 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:24:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:24:57,506 INFO L93 Difference]: Finished difference Result 2068 states and 6699 transitions. [2021-06-05 16:24:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:24:57,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 16:24:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:24:57,509 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 16:24:57,509 INFO L226 Difference]: Without dead ends: 2053 [2021-06-05 16:24:57,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 774.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:24:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-05 16:24:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1238. [2021-06-05 16:24:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:24:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-05 16:24:57,528 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-05 16:24:57,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:24:57,528 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-05 16:24:57,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:24:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-05 16:24:57,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:24:57,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:24:57,529 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 16:24:57,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-05 16:24:57,730 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:24:57,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:24:57,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1541898973, now seen corresponding path program 12 times [2021-06-05 16:24:57,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:24:57,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658871034] [2021-06-05 16:24:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:24:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:24:57,903 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 16:24:57,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:24:57,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658871034] [2021-06-05 16:24:57,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658871034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:57,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926417618] [2021-06-05 16:24:57,903 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 16:24:57,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:24:57,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:24:57,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:24:57,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:24:58,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:24:58,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:58,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 43 [2021-06-05 16:24:58,078 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:58,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:58,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:24:58,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:58,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:24:58,110 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:24:58,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:58,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:58,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:24:58,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:24:58,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:24:58,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:24:58,193 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:24 [2021-06-05 16:24:58,248 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 16:24:58,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926417618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:58,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:24:58,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:24:58,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490435511] [2021-06-05 16:24:58,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:24:58,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:24:58,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:24:58,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:24:58,249 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) 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 16:24:59,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:24:59,585 INFO L93 Difference]: Finished difference Result 1885 states and 6123 transitions. [2021-06-05 16:24:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:24:59,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:24:59,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:24:59,588 INFO L225 Difference]: With dead ends: 1885 [2021-06-05 16:24:59,588 INFO L226 Difference]: Without dead ends: 1870 [2021-06-05 16:24:59,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1129.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:24:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-06-05 16:24:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1238. [2021-06-05 16:24:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:24:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-05 16:24:59,607 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-05 16:24:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:24:59,607 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-05 16:24:59,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:24:59,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-05 16:24:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:24:59,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:24:59,609 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 16:24:59,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:24:59,810 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:24:59,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:24:59,810 INFO L82 PathProgramCache]: Analyzing trace with hash -73165897, now seen corresponding path program 39 times [2021-06-05 16:24:59,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:24:59,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345558833] [2021-06-05 16:24:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:24:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:24:59,993 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 16:24:59,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:24:59,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345558833] [2021-06-05 16:24:59,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345558833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:24:59,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836874147] [2021-06-05 16:24:59,993 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 16:25:00,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:25:00,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:00,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:25:00,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:00,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:00,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:00,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:00,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:00,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 37 [2021-06-05 16:25:00,138 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:00,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:00,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:00,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:00,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:00,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:00,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 27 [2021-06-05 16:25:00,154 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:00,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:00,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:00,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:25:00,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:25:00,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:00,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:00,184 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:25:00,202 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 16:25:00,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836874147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:00,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:00,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:25:00,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860756552] [2021-06-05 16:25:00,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:25:00,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:00,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:25:00,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:25:00,203 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:25:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:01,945 INFO L93 Difference]: Finished difference Result 2877 states and 8911 transitions. [2021-06-05 16:25:01,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:25:01,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 16:25:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:01,950 INFO L225 Difference]: With dead ends: 2877 [2021-06-05 16:25:01,950 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 16:25:01,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1379.1ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:25:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 16:25:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1288. [2021-06-05 16:25:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3737373737373737) internal successors, (4342), 1287 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4342 transitions. [2021-06-05 16:25:01,970 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4342 transitions. Word has length 26 [2021-06-05 16:25:01,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:01,970 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4342 transitions. [2021-06-05 16:25:01,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:25:01,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4342 transitions. [2021-06-05 16:25:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:01,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:01,972 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 16:25:02,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1767 [2021-06-05 16:25:02,174 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1129146471, now seen corresponding path program 40 times [2021-06-05 16:25:02,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:02,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522086041] [2021-06-05 16:25:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:02,461 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 16:25:02,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:02,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522086041] [2021-06-05 16:25:02,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522086041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:02,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816636375] [2021-06-05 16:25:02,461 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 16:25:02,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:25:02,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:02,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:25:02,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:02,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:02,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:02,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:02,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 37 [2021-06-05 16:25:02,650 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:02,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:02,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:02,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:02,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:02,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 16:25:02,663 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:02,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:02,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:02,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:25:02,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:25:02,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:02,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:02,690 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:25:02,708 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 16:25:02,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816636375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:02,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:02,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:25:02,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444421353] [2021-06-05 16:25:02,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:25:02,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:02,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:25:02,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:25:02,710 INFO L87 Difference]: Start difference. First operand 1288 states and 4342 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:25:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:04,402 INFO L93 Difference]: Finished difference Result 2741 states and 8623 transitions. [2021-06-05 16:25:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:25:04,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 16:25:04,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:04,406 INFO L225 Difference]: With dead ends: 2741 [2021-06-05 16:25:04,407 INFO L226 Difference]: Without dead ends: 2696 [2021-06-05 16:25:04,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1561.7ms TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:25:04,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-05 16:25:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 1284. [2021-06-05 16:25:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.38269680436477) internal successors, (4340), 1283 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4340 transitions. [2021-06-05 16:25:04,431 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4340 transitions. Word has length 26 [2021-06-05 16:25:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:04,432 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4340 transitions. [2021-06-05 16:25:04,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:25:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4340 transitions. [2021-06-05 16:25:04,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:04,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:04,433 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 16:25:04,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1768,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:25:04,634 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:04,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:04,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1332172173, now seen corresponding path program 41 times [2021-06-05 16:25:04,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:04,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557641052] [2021-06-05 16:25:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:25:04,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:04,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557641052] [2021-06-05 16:25:04,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557641052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:04,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266702215] [2021-06-05 16:25:04,835 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 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 16:25:04,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:25:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:04,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:25:04,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:05,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:05,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-05 16:25:05,103 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:05,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:05,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:05,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:05,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:05,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 16:25:05,213 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:05,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:05,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:05,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:25:05,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:25:06,006 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-06-05 16:25:06,007 INFO L628 ElimStorePlain]: treesize reduction 198, result has 89.8 percent of original size [2021-06-05 16:25:06,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:06,326 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:38 [2021-06-05 16:25:06,363 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 16:25:06,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266702215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:06,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:06,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:25:06,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328922134] [2021-06-05 16:25:06,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:25:06,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:06,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:25:06,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:25:06,364 INFO L87 Difference]: Start difference. First operand 1284 states and 4340 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:25:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:08,337 INFO L93 Difference]: Finished difference Result 3022 states and 9448 transitions. [2021-06-05 16:25:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:25:08,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 16:25:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:08,342 INFO L225 Difference]: With dead ends: 3022 [2021-06-05 16:25:08,342 INFO L226 Difference]: Without dead ends: 2977 [2021-06-05 16:25:08,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1715.2ms TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:25:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2021-06-05 16:25:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 1288. [2021-06-05 16:25:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3885003885003884) internal successors, (4361), 1287 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4361 transitions. [2021-06-05 16:25:08,365 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4361 transitions. Word has length 26 [2021-06-05 16:25:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:08,365 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4361 transitions. [2021-06-05 16:25:08,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:25:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4361 transitions. [2021-06-05 16:25:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:08,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:08,367 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 16:25:08,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1769 [2021-06-05 16:25:08,571 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:08,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:08,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1119783259, now seen corresponding path program 13 times [2021-06-05 16:25:08,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:08,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304847853] [2021-06-05 16:25:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:08,752 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 16:25:08,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:08,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304847853] [2021-06-05 16:25:08,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304847853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:08,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426865558] [2021-06-05 16:25:08,753 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 16:25:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:25:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:08,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:08,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:08,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:25:08,948 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:08,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:08,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:08,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:08,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:25:08,959 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:08,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:08,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:08,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:25:08,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:25:08,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:08,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:08,979 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:25:08,991 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 16:25:08,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426865558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:08,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:08,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:25:08,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463578799] [2021-06-05 16:25:08,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:25:08,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:08,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:25:08,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:25:08,992 INFO L87 Difference]: Start difference. First operand 1288 states and 4361 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:25:09,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:09,412 INFO L93 Difference]: Finished difference Result 1650 states and 5461 transitions. [2021-06-05 16:25:09,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:25:09,413 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:25:09,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:09,415 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 16:25:09,415 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 16:25:09,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 474.7ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:25:09,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 16:25:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1297. [2021-06-05 16:25:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.388117283950617) internal successors, (4391), 1296 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4391 transitions. [2021-06-05 16:25:09,431 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4391 transitions. Word has length 26 [2021-06-05 16:25:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:09,431 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4391 transitions. [2021-06-05 16:25:09,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:25:09,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4391 transitions. [2021-06-05 16:25:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:09,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:09,433 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 16:25:09,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1893 [2021-06-05 16:25:09,634 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:09,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:09,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1448942831, now seen corresponding path program 14 times [2021-06-05 16:25:09,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:09,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999756332] [2021-06-05 16:25:09,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:09,797 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 16:25:09,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:09,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999756332] [2021-06-05 16:25:09,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999756332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:09,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801840490] [2021-06-05 16:25:09,797 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 16:25:09,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:25:09,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:09,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:25:09,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:09,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:09,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 51 [2021-06-05 16:25:10,017 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:10,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:10,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:10,043 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:25:10,076 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:10,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:10,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:10,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:25:10,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:25:10,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:10,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:10,229 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:75 [2021-06-05 16:25:10,290 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 16:25:10,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801840490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:10,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:10,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:25:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961695913] [2021-06-05 16:25:10,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:25:10,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:10,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:25:10,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:25:10,290 INFO L87 Difference]: Start difference. First operand 1297 states and 4391 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:25:11,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:11,427 INFO L93 Difference]: Finished difference Result 2002 states and 6515 transitions. [2021-06-05 16:25:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:25:11,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:25:11,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:11,430 INFO L225 Difference]: With dead ends: 2002 [2021-06-05 16:25:11,430 INFO L226 Difference]: Without dead ends: 1987 [2021-06-05 16:25:11,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 884.1ms TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:25:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-05 16:25:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1289. [2021-06-05 16:25:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3975155279503104) internal successors, (4376), 1288 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4376 transitions. [2021-06-05 16:25:11,448 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4376 transitions. Word has length 26 [2021-06-05 16:25:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:11,448 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 4376 transitions. [2021-06-05 16:25:11,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:25:11,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4376 transitions. [2021-06-05 16:25:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:11,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:11,450 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 16:25:11,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1894,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:25:11,651 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:11,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:11,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1281133739, now seen corresponding path program 15 times [2021-06-05 16:25:11,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:11,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079225786] [2021-06-05 16:25:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:11,843 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 16:25:11,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:11,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079225786] [2021-06-05 16:25:11,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079225786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:11,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519485089] [2021-06-05 16:25:11,844 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) [2021-06-05 16:25:11,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:25:11,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:25:11,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:25:11,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:12,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:12,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 59 [2021-06-05 16:25:12,122 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:12,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:12,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:12,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 16:25:12,231 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:12,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:12,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:12,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:25:12,286 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:25:12,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:12,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 16 xjuncts. [2021-06-05 16:25:12,513 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:617 [2021-06-05 16:25:12,858 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-06-05 16:25:13,003 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 16:25:13,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519485089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:13,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:13,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:25:13,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807725476] [2021-06-05 16:25:13,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:25:13,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:13,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:25:13,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:25:13,004 INFO L87 Difference]: Start difference. First operand 1289 states and 4376 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:25:14,544 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-06-05 16:25:16,608 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 16:25:18,981 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 16:25:19,648 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-06-05 16:25:20,769 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-06-05 16:25:20,923 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 16:25:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:20,986 INFO L93 Difference]: Finished difference Result 1952 states and 6311 transitions. [2021-06-05 16:25:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:25:20,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:25:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:20,989 INFO L225 Difference]: With dead ends: 1952 [2021-06-05 16:25:20,989 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 16:25:20,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 6089.8ms TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:25:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 16:25:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1302. [2021-06-05 16:25:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.4027671022290544) internal successors, (4427), 1301 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4427 transitions. [2021-06-05 16:25:21,009 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4427 transitions. Word has length 26 [2021-06-05 16:25:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:21,009 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4427 transitions. [2021-06-05 16:25:21,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:25:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4427 transitions. [2021-06-05 16:25:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:21,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:21,011 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 16:25:21,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1950 [2021-06-05 16:25:21,233 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:21,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1261165713, now seen corresponding path program 16 times [2021-06-05 16:25:21,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:21,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399794211] [2021-06-05 16:25:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:21,416 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 16:25:21,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:21,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399794211] [2021-06-05 16:25:21,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399794211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:21,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635041945] [2021-06-05 16:25:21,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:25:21,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:25:21,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:25:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:21,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:21,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:21,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 43 [2021-06-05 16:25:21,568 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:21,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:21,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:21,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:21,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:25:21,606 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:21,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:21,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:21,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:25:21,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:25:21,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:21,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:21,710 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:55, output treesize:17 [2021-06-05 16:25:21,750 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 16:25:21,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635041945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:21,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:21,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:25:21,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635905103] [2021-06-05 16:25:21,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:25:21,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:25:21,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:25:21,750 INFO L87 Difference]: Start difference. First operand 1302 states and 4427 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 16:25:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:22,080 INFO L93 Difference]: Finished difference Result 1783 states and 5883 transitions. [2021-06-05 16:25:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:25:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:25:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:22,083 INFO L225 Difference]: With dead ends: 1783 [2021-06-05 16:25:22,083 INFO L226 Difference]: Without dead ends: 1768 [2021-06-05 16:25:22,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:25:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-06-05 16:25:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1298. [2021-06-05 16:25:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.397070161912105) internal successors, (4406), 1297 states have internal predecessors, (4406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4406 transitions. [2021-06-05 16:25:22,099 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4406 transitions. Word has length 26 [2021-06-05 16:25:22,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:22,100 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 4406 transitions. [2021-06-05 16:25:22,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 16:25:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4406 transitions. [2021-06-05 16:25:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:22,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:22,102 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 16:25:22,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2048,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:25:22,302 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1283103649, now seen corresponding path program 17 times [2021-06-05 16:25:22,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:22,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195134084] [2021-06-05 16:25:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:22,481 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 16:25:22,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:22,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195134084] [2021-06-05 16:25:22,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195134084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:22,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976424314] [2021-06-05 16:25:22,481 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 16:25:22,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:25:22,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:22,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:25:22,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:22,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:22,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:22,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:25:22,692 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:22,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:22,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:22,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:22,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:25:22,702 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:22,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:22,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:22,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:25:22,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:25:22,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:22,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:22,723 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:25:22,740 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 16:25:22,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976424314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:22,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:22,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:25:22,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663172761] [2021-06-05 16:25:22,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:25:22,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:22,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:25:22,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:25:22,741 INFO L87 Difference]: Start difference. First operand 1298 states and 4406 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:25:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:23,719 INFO L93 Difference]: Finished difference Result 1768 states and 5860 transitions. [2021-06-05 16:25:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:25:23,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:25:23,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:23,723 INFO L225 Difference]: With dead ends: 1768 [2021-06-05 16:25:23,723 INFO L226 Difference]: Without dead ends: 1753 [2021-06-05 16:25:23,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 839.0ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:25:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-06-05 16:25:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1301. [2021-06-05 16:25:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3984615384615386) internal successors, (4418), 1300 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:23,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4418 transitions. [2021-06-05 16:25:23,742 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4418 transitions. Word has length 26 [2021-06-05 16:25:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:23,743 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4418 transitions. [2021-06-05 16:25:23,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:25:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4418 transitions. [2021-06-05 16:25:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:23,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:23,745 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 16:25:23,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2067 [2021-06-05 16:25:23,945 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1394330867, now seen corresponding path program 18 times [2021-06-05 16:25:23,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:23,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383808308] [2021-06-05 16:25:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:24,118 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 16:25:24,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:24,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383808308] [2021-06-05 16:25:24,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383808308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:24,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001910136] [2021-06-05 16:25:24,119 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 16:25:24,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:25:24,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:24,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:25:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:24,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:24,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:24,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 43 [2021-06-05 16:25:24,286 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:24,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:24,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:24,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:24,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:25:24,319 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:24,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:24,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:24,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:25:24,352 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:25:24,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:24,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:24,403 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-06-05 16:25:24,437 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 16:25:24,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001910136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:24,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:24,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:25:24,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696728787] [2021-06-05 16:25:24,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:25:24,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:24,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:25:24,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:25:24,438 INFO L87 Difference]: Start difference. First operand 1301 states and 4418 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:25:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:25,277 INFO L93 Difference]: Finished difference Result 2171 states and 7095 transitions. [2021-06-05 16:25:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:25:25,277 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 16:25:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:25,280 INFO L225 Difference]: With dead ends: 2171 [2021-06-05 16:25:25,280 INFO L226 Difference]: Without dead ends: 2156 [2021-06-05 16:25:25,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 731.4ms TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:25:25,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-05 16:25:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1295. [2021-06-05 16:25:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.3956723338485317) internal successors, (4394), 1294 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4394 transitions. [2021-06-05 16:25:25,300 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4394 transitions. Word has length 26 [2021-06-05 16:25:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:25,300 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4394 transitions. [2021-06-05 16:25:25,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:25:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4394 transitions. [2021-06-05 16:25:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:25,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:25,302 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 16:25:25,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2068 [2021-06-05 16:25:25,503 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:25,503 INFO L82 PathProgramCache]: Analyzing trace with hash 911449975, now seen corresponding path program 19 times [2021-06-05 16:25:25,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:25,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644104439] [2021-06-05 16:25:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:25,692 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 16:25:25,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:25,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644104439] [2021-06-05 16:25:25,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644104439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:25,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835205653] [2021-06-05 16:25:25,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:25:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:25,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:25:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:25,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:25,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:25,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:25:25,892 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:25,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:25,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:25,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:25:25,902 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:25,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:25,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:25,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:25:25,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:25:25,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:25,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:25,923 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:25:25,936 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 16:25:25,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835205653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:25,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:25,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:25:25,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704040449] [2021-06-05 16:25:25,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:25:25,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:25,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:25:25,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:25:25,937 INFO L87 Difference]: Start difference. First operand 1295 states and 4394 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:25:26,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:26,396 INFO L93 Difference]: Finished difference Result 1728 states and 5699 transitions. [2021-06-05 16:25:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:25:26,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:25:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:26,399 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 16:25:26,399 INFO L226 Difference]: Without dead ends: 1707 [2021-06-05 16:25:26,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 497.0ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:25:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-05 16:25:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1336. [2021-06-05 16:25:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.390262172284644) internal successors, (4526), 1335 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4526 transitions. [2021-06-05 16:25:26,417 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4526 transitions. Word has length 26 [2021-06-05 16:25:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:26,417 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4526 transitions. [2021-06-05 16:25:26,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 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 16:25:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4526 transitions. [2021-06-05 16:25:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:26,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:26,419 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 16:25:26,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:25:26,635 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:26,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:26,635 INFO L82 PathProgramCache]: Analyzing trace with hash 743640883, now seen corresponding path program 20 times [2021-06-05 16:25:26,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:26,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042232619] [2021-06-05 16:25:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:26,833 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 16:25:26,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:26,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042232619] [2021-06-05 16:25:26,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042232619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:26,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994125274] [2021-06-05 16:25:26,833 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 16:25:26,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:25:26,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:26,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:25:26,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:27,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:27,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 16:25:27,070 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:27,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:27,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:27,102 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:25:27,141 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:27,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:27,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:27,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:25:27,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:25:27,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:27,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:27,306 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:184 [2021-06-05 16:25:27,416 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 16:25:27,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994125274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:27,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:27,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 16:25:27,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686162710] [2021-06-05 16:25:27,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:25:27,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:27,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:25:27,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:25:27,417 INFO L87 Difference]: Start difference. First operand 1336 states and 4526 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:25:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:28,505 INFO L93 Difference]: Finished difference Result 1950 states and 6250 transitions. [2021-06-05 16:25:28,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:25:28,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:25:28,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:28,508 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 16:25:28,508 INFO L226 Difference]: Without dead ends: 1925 [2021-06-05 16:25:28,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1037.7ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:25:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-06-05 16:25:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1350. [2021-06-05 16:25:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.3995552260934025) internal successors, (4586), 1349 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4586 transitions. [2021-06-05 16:25:28,526 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4586 transitions. Word has length 26 [2021-06-05 16:25:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:28,526 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4586 transitions. [2021-06-05 16:25:28,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 16:25:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4586 transitions. [2021-06-05 16:25:28,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:28,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:28,528 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 16:25:28,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2088,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:25:28,729 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash 723672857, now seen corresponding path program 21 times [2021-06-05 16:25:28,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:28,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584943942] [2021-06-05 16:25:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:25:28,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:28,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584943942] [2021-06-05 16:25:28,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584943942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:28,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331875245] [2021-06-05 16:25:28,933 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 16:25:28,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:25:28,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:28,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:25:28,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:29,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:29,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:29,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 43 [2021-06-05 16:25:29,130 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:29,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:29,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:29,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:29,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:25:29,161 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:29,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:29,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:29,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:25:29,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:25:29,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:29,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:29,252 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:19 [2021-06-05 16:25:29,290 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 16:25:29,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331875245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:29,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:29,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:25:29,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820620069] [2021-06-05 16:25:29,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:25:29,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:29,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:25:29,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:25:29,291 INFO L87 Difference]: Start difference. First operand 1350 states and 4586 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) 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 16:25:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:30,053 INFO L93 Difference]: Finished difference Result 1841 states and 6067 transitions. [2021-06-05 16:25:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:25:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:25:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:30,056 INFO L225 Difference]: With dead ends: 1841 [2021-06-05 16:25:30,056 INFO L226 Difference]: Without dead ends: 1812 [2021-06-05 16:25:30,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 689.8ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:25:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-06-05 16:25:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1353. [2021-06-05 16:25:30,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.400147928994083) internal successors, (4597), 1352 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4597 transitions. [2021-06-05 16:25:30,080 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4597 transitions. Word has length 26 [2021-06-05 16:25:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:30,080 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 4597 transitions. [2021-06-05 16:25:30,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:25:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4597 transitions. [2021-06-05 16:25:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:30,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:30,082 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 16:25:30,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2139 [2021-06-05 16:25:30,283 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:30,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1042414331, now seen corresponding path program 22 times [2021-06-05 16:25:30,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:30,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935490293] [2021-06-05 16:25:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:30,489 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 16:25:30,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:30,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935490293] [2021-06-05 16:25:30,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935490293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:30,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798679436] [2021-06-05 16:25:30,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:25:30,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:25:30,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:30,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:25:30,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:25:30,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:30,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:30,660 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 43 treesize of output 35 [2021-06-05 16:25:30,662 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:30,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:30,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:30,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:30,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:25:30,673 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:30,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:30,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:30,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:25:30,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:25:30,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:30,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:30,696 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:25:30,713 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 16:25:30,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798679436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:30,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:30,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:25:30,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396277450] [2021-06-05 16:25:30,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:25:30,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:30,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:25:30,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:25:30,714 INFO L87 Difference]: Start difference. First operand 1353 states and 4597 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 16:25:31,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:31,719 INFO L93 Difference]: Finished difference Result 1466 states and 4903 transitions. [2021-06-05 16:25:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:25:31,720 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-06-05 16:25:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:31,722 INFO L225 Difference]: With dead ends: 1466 [2021-06-05 16:25:31,722 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 16:25:31,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 332.6ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:25:31,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 16:25:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1359. [2021-06-05 16:25:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 3.402061855670103) internal successors, (4620), 1358 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 4620 transitions. [2021-06-05 16:25:31,737 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 4620 transitions. Word has length 26 [2021-06-05 16:25:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:31,737 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 4620 transitions. [2021-06-05 16:25:31,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 16:25:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 4620 transitions. [2021-06-05 16:25:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:31,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:31,739 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 16:25:31,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2158,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:25:31,941 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1681727365, now seen corresponding path program 23 times [2021-06-05 16:25:31,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:31,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434446524] [2021-06-05 16:25:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:32,121 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 16:25:32,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:32,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434446524] [2021-06-05 16:25:32,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434446524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:32,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671713982] [2021-06-05 16:25:32,121 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) [2021-06-05 16:25:32,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:25:32,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:25:32,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:25:32,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:33,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:33,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:33,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 43 [2021-06-05 16:25:33,327 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:33,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:33,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:33,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:33,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:25:33,360 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:33,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:33,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:33,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:25:33,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:25:33,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:33,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:33,455 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:15 [2021-06-05 16:25:33,491 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 16:25:33,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671713982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:33,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:33,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:25:33,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153369517] [2021-06-05 16:25:33,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:25:33,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:33,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:25:33,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2021-06-05 16:25:33,493 INFO L87 Difference]: Start difference. First operand 1359 states and 4620 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:25:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:34,162 INFO L93 Difference]: Finished difference Result 1987 states and 6490 transitions. [2021-06-05 16:25:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:25:34,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 16:25:34,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:34,165 INFO L225 Difference]: With dead ends: 1987 [2021-06-05 16:25:34,165 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 16:25:34,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1652.6ms TimeCoverageRelationStatistics Valid=191, Invalid=864, Unknown=1, NotChecked=0, Total=1056 [2021-06-05 16:25:34,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 16:25:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1366. [2021-06-05 16:25:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.4065934065934065) internal successors, (4650), 1365 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4650 transitions. [2021-06-05 16:25:34,184 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4650 transitions. Word has length 26 [2021-06-05 16:25:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:34,184 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4650 transitions. [2021-06-05 16:25:34,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:25:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4650 transitions. [2021-06-05 16:25:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:34,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:34,186 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 16:25:34,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2159 [2021-06-05 16:25:34,401 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash 508379419, now seen corresponding path program 24 times [2021-06-05 16:25:34,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:34,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794626487] [2021-06-05 16:25:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:34,582 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 16:25:34,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:34,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794626487] [2021-06-05 16:25:34,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794626487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:34,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174981460] [2021-06-05 16:25:34,582 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 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 16:25:34,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:25:34,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:34,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:25:34,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:34,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:34,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:34,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:34,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2021-06-05 16:25:34,806 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:34,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:34,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:34,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 41 [2021-06-05 16:25:34,839 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:34,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:34,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:34,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 16:25:34,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:25:34,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:34,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:34,936 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:17 [2021-06-05 16:25:34,968 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 16:25:34,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174981460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:34,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:34,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:25:34,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323118235] [2021-06-05 16:25:34,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:25:34,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:34,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:25:34,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:25:34,969 INFO L87 Difference]: Start difference. First operand 1366 states and 4650 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) 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 16:25:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:35,694 INFO L93 Difference]: Finished difference Result 1843 states and 6121 transitions. [2021-06-05 16:25:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:25:35,694 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:25:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:35,697 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 16:25:35,697 INFO L226 Difference]: Without dead ends: 1824 [2021-06-05 16:25:35,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 654.2ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:25:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-05 16:25:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1378. [2021-06-05 16:25:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.4095860566448803) internal successors, (4695), 1377 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4695 transitions. [2021-06-05 16:25:35,715 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4695 transitions. Word has length 26 [2021-06-05 16:25:35,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:35,715 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4695 transitions. [2021-06-05 16:25:35,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:25:35,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4695 transitions. [2021-06-05 16:25:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:35,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:35,717 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 16:25:35,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2178 [2021-06-05 16:25:35,918 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:35,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:35,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1495871031, now seen corresponding path program 25 times [2021-06-05 16:25:35,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:35,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014538885] [2021-06-05 16:25:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:36,082 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 16:25:36,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:36,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014538885] [2021-06-05 16:25:36,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014538885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:36,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349008188] [2021-06-05 16:25:36,083 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 16:25:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:25:36,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:36,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:36,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:36,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 43 [2021-06-05 16:25:36,243 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:36,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:36,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:36,261 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:36,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:25:36,291 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:36,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:36,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:36,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:25:36,337 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:25:36,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:36,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:36,393 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 16:25:36,429 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 16:25:36,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349008188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:36,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:36,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:25:36,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257770708] [2021-06-05 16:25:36,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:25:36,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:36,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:25:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:25:36,430 INFO L87 Difference]: Start difference. First operand 1378 states and 4695 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:25:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:36,968 INFO L93 Difference]: Finished difference Result 1965 states and 6485 transitions. [2021-06-05 16:25:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:25:36,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 16:25:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:36,972 INFO L225 Difference]: With dead ends: 1965 [2021-06-05 16:25:36,972 INFO L226 Difference]: Without dead ends: 1940 [2021-06-05 16:25:36,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 484.8ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:25:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-05 16:25:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1378. [2021-06-05 16:25:36,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.4095860566448803) internal successors, (4695), 1377 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4695 transitions. [2021-06-05 16:25:36,992 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4695 transitions. Word has length 26 [2021-06-05 16:25:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:36,992 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4695 transitions. [2021-06-05 16:25:36,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:25:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4695 transitions. [2021-06-05 16:25:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:36,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:36,993 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] [2021-06-05 16:25:37,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2195,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:25:37,194 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1425327497, now seen corresponding path program 42 times [2021-06-05 16:25:37,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:37,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317055860] [2021-06-05 16:25:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:25:37,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:37,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317055860] [2021-06-05 16:25:37,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317055860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:37,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982029470] [2021-06-05 16:25:37,419 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 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 16:25:37,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:25:37,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:25:37,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:25:37,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:37,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:37,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:37,570 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 47 treesize of output 37 [2021-06-05 16:25:37,572 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:37,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:37,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:37,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:37,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:37,584 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 27 [2021-06-05 16:25:37,586 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:37,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:37,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:37,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:25:37,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:25:37,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:37,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:37,608 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:25:37,621 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 16:25:37,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982029470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:37,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:37,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:25:37,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438141381] [2021-06-05 16:25:37,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:25:37,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:25:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:25:37,622 INFO L87 Difference]: Start difference. First operand 1378 states and 4695 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:25:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:25:38,560 INFO L93 Difference]: Finished difference Result 1798 states and 5944 transitions. [2021-06-05 16:25:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:25:38,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:25:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:25:38,563 INFO L225 Difference]: With dead ends: 1798 [2021-06-05 16:25:38,563 INFO L226 Difference]: Without dead ends: 1772 [2021-06-05 16:25:38,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 939.3ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:25:38,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-06-05 16:25:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1390. [2021-06-05 16:25:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.4046076313894886) internal successors, (4729), 1389 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:25:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4729 transitions. [2021-06-05 16:25:38,581 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4729 transitions. Word has length 26 [2021-06-05 16:25:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:25:38,581 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4729 transitions. [2021-06-05 16:25:38,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:25:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4729 transitions. [2021-06-05 16:25:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:25:38,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:25:38,583 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 16:25:38,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2214,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:25:38,784 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:25:38,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:25:38,784 INFO L82 PathProgramCache]: Analyzing trace with hash -357452933, now seen corresponding path program 43 times [2021-06-05 16:25:38,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:25:38,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863237863] [2021-06-05 16:25:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:25:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:38,998 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 16:25:38,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:25:38,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863237863] [2021-06-05 16:25:38,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863237863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:38,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739427030] [2021-06-05 16:25:38,999 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 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 16:25:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:25:39,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:25:39,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:25:39,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:39,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:39,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:39,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 37 [2021-06-05 16:25:39,902 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:39,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:39,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:39,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:25:39,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:25:39,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 16:25:39,914 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:25:39,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:39,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:39,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:25:39,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:25:39,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:25:39,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:25:39,936 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:25:39,953 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 16:25:39,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739427030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:25:39,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:25:39,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:25:39,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303267774] [2021-06-05 16:25:39,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:25:39,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:25:39,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:25:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=216, Unknown=1, NotChecked=0, Total=272 [2021-06-05 16:25:39,954 INFO L87 Difference]: Start difference. First operand 1390 states and 4729 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 16:26:03,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:03,080 INFO L93 Difference]: Finished difference Result 1990 states and 6587 transitions. [2021-06-05 16:26:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:26:03,080 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 16:26:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:03,083 INFO L225 Difference]: With dead ends: 1990 [2021-06-05 16:26:03,083 INFO L226 Difference]: Without dead ends: 1975 [2021-06-05 16:26:03,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 5061.2ms TimeCoverageRelationStatistics Valid=336, Invalid=1381, Unknown=5, NotChecked=0, Total=1722 [2021-06-05 16:26:03,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-06-05 16:26:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1390. [2021-06-05 16:26:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.4046076313894886) internal successors, (4729), 1389 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4729 transitions. [2021-06-05 16:26:03,100 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4729 transitions. Word has length 26 [2021-06-05 16:26:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:03,100 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4729 transitions. [2021-06-05 16:26:03,100 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 16:26:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4729 transitions. [2021-06-05 16:26:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:03,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:03,102 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 16:26:03,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2215 [2021-06-05 16:26:03,302 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:03,302 INFO L82 PathProgramCache]: Analyzing trace with hash -945828357, now seen corresponding path program 26 times [2021-06-05 16:26:03,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:03,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313552947] [2021-06-05 16:26:03,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:03,482 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 16:26:03,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:03,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313552947] [2021-06-05 16:26:03,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313552947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:03,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427227592] [2021-06-05 16:26:03,483 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 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 16:26:03,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:26:03,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:03,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:26:03,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:03,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:03,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:03,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:26:03,655 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:03,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:03,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:03,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:03,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:26:03,665 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:03,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:03,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:03,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:26:03,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:03,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:03,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:03,687 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:26:03,711 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 16:26:03,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427227592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:03,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:03,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:26:03,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788647336] [2021-06-05 16:26:03,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:26:03,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:03,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:26:03,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:26:03,712 INFO L87 Difference]: Start difference. First operand 1390 states and 4729 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:26:04,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:04,306 INFO L93 Difference]: Finished difference Result 1896 states and 6197 transitions. [2021-06-05 16:26:04,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:26:04,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 16:26:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:04,309 INFO L225 Difference]: With dead ends: 1896 [2021-06-05 16:26:04,309 INFO L226 Difference]: Without dead ends: 1881 [2021-06-05 16:26:04,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 607.4ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:26:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-06-05 16:26:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1401. [2021-06-05 16:26:04,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 3.405) internal successors, (4767), 1400 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 4767 transitions. [2021-06-05 16:26:04,326 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 4767 transitions. Word has length 26 [2021-06-05 16:26:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:04,326 INFO L482 AbstractCegarLoop]: Abstraction has 1401 states and 4767 transitions. [2021-06-05 16:26:04,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:26:04,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 4767 transitions. [2021-06-05 16:26:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:04,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:04,328 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 16:26:04,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2216,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:04,528 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:04,529 INFO L82 PathProgramCache]: Analyzing trace with hash 604553207, now seen corresponding path program 44 times [2021-06-05 16:26:04,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:04,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310028970] [2021-06-05 16:26:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:04,752 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 16:26:04,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:04,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310028970] [2021-06-05 16:26:04,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310028970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:04,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130956765] [2021-06-05 16:26:04,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:04,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:26:04,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:04,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:26:04,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:04,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:04,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:04,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:04,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 16:26:05,016 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:05,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:05,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:05,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:05,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:05,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 53 [2021-06-05 16:26:05,132 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:05,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:05,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:05,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:26:05,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:26:06,349 WARN L205 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2021-06-05 16:26:06,349 INFO L628 ElimStorePlain]: treesize reduction 426, result has 80.4 percent of original size [2021-06-05 16:26:06,508 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 149 [2021-06-05 16:26:06,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:06,761 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:149 [2021-06-05 16:26:06,820 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 16:26:06,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130956765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:06,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:06,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:26:06,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702472599] [2021-06-05 16:26:06,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:26:06,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:06,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:26:06,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:26:06,821 INFO L87 Difference]: Start difference. First operand 1401 states and 4767 transitions. Second operand has 20 states, 20 states have (on average 2.4) 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 16:26:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:08,644 INFO L93 Difference]: Finished difference Result 2295 states and 7289 transitions. [2021-06-05 16:26:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:26:08,644 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) 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 16:26:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:08,647 INFO L225 Difference]: With dead ends: 2295 [2021-06-05 16:26:08,648 INFO L226 Difference]: Without dead ends: 2251 [2021-06-05 16:26:08,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1528.0ms TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:26:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-05 16:26:08,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1408. [2021-06-05 16:26:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.405828002842928) internal successors, (4792), 1407 states have internal predecessors, (4792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4792 transitions. [2021-06-05 16:26:08,668 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4792 transitions. Word has length 26 [2021-06-05 16:26:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:08,668 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 4792 transitions. [2021-06-05 16:26:08,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) 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 16:26:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4792 transitions. [2021-06-05 16:26:08,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:08,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:08,670 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 16:26:08,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2217 [2021-06-05 16:26:08,878 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:08,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:08,878 INFO L82 PathProgramCache]: Analyzing trace with hash -371765637, now seen corresponding path program 45 times [2021-06-05 16:26:08,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:08,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390501656] [2021-06-05 16:26:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:09,046 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 16:26:09,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:09,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390501656] [2021-06-05 16:26:09,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390501656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:09,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156484811] [2021-06-05 16:26:09,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:09,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:26:09,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:09,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:26:09,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:09,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:09,250 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 16:26:09,250 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 217 [2021-06-05 16:26:09,315 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:09,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:09,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:09,367 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 16:26:09,367 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 195 [2021-06-05 16:26:09,525 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:09,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:09,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:09,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 193 treesize of output 177 [2021-06-05 16:26:09,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:10,371 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 122 [2021-06-05 16:26:10,371 INFO L628 ElimStorePlain]: treesize reduction 242, result has 87.7 percent of original size [2021-06-05 16:26:10,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:10,748 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:245, output treesize:232 [2021-06-05 16:26:10,808 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 16:26:10,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156484811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:10,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:10,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 16:26:10,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685755660] [2021-06-05 16:26:10,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:26:10,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:10,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:26:10,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:26:10,809 INFO L87 Difference]: Start difference. First operand 1408 states and 4792 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 16:26:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:12,348 INFO L93 Difference]: Finished difference Result 2489 states and 8040 transitions. [2021-06-05 16:26:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:26:12,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 16:26:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:12,352 INFO L225 Difference]: With dead ends: 2489 [2021-06-05 16:26:12,352 INFO L226 Difference]: Without dead ends: 2474 [2021-06-05 16:26:12,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1214.6ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:26:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-05 16:26:12,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1418. [2021-06-05 16:26:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.4064925899788285) internal successors, (4827), 1417 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4827 transitions. [2021-06-05 16:26:12,374 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4827 transitions. Word has length 26 [2021-06-05 16:26:12,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:12,374 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 4827 transitions. [2021-06-05 16:26:12,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 16:26:12,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4827 transitions. [2021-06-05 16:26:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:12,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:12,376 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 16:26:12,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2350,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:12,589 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:12,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:12,589 INFO L82 PathProgramCache]: Analyzing trace with hash 644042019, now seen corresponding path program 27 times [2021-06-05 16:26:12,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:12,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797375576] [2021-06-05 16:26:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:12,765 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 16:26:12,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:12,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797375576] [2021-06-05 16:26:12,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797375576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:12,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755880445] [2021-06-05 16:26:12,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:26:12,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:26:12,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:12,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:26:12,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:12,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:12,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:26:12,941 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:12,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:12,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:12,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:12,949 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 35 treesize of output 27 [2021-06-05 16:26:12,951 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:12,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:12,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:12,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:26:12,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:12,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:12,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:12,974 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:26:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:12,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755880445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:12,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:12,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:26:12,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270792544] [2021-06-05 16:26:12,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:26:12,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:12,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:26:12,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:26:12,991 INFO L87 Difference]: Start difference. First operand 1418 states and 4827 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:26:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:13,845 INFO L93 Difference]: Finished difference Result 2009 states and 6538 transitions. [2021-06-05 16:26:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:26:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 16:26:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:13,849 INFO L225 Difference]: With dead ends: 2009 [2021-06-05 16:26:13,849 INFO L226 Difference]: Without dead ends: 1994 [2021-06-05 16:26:13,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 721.0ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:26:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-06-05 16:26:13,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1423. [2021-06-05 16:26:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.407876230661041) internal successors, (4846), 1422 states have internal predecessors, (4846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4846 transitions. [2021-06-05 16:26:13,870 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4846 transitions. Word has length 26 [2021-06-05 16:26:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:13,870 INFO L482 AbstractCegarLoop]: Abstraction has 1423 states and 4846 transitions. [2021-06-05 16:26:13,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:26:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4846 transitions. [2021-06-05 16:26:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:13,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:13,872 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 16:26:14,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-06-05 16:26:14,073 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash -973490761, now seen corresponding path program 28 times [2021-06-05 16:26:14,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:14,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069040944] [2021-06-05 16:26:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:14,216 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 16:26:14,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:14,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069040944] [2021-06-05 16:26:14,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069040944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:14,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335865510] [2021-06-05 16:26:14,216 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 16:26:14,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:26:14,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:14,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:26:14,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:14,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:14,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:14,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 43 [2021-06-05 16:26:14,389 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:14,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:14,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:14,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:14,406 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 35 treesize of output 35 [2021-06-05 16:26:14,420 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:14,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:14,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:14,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:26:14,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:26:14,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:14,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:14,516 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 16:26:14,551 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 16:26:14,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335865510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:14,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:14,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:26:14,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278384366] [2021-06-05 16:26:14,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:26:14,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:14,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:26:14,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:26:14,552 INFO L87 Difference]: Start difference. First operand 1423 states and 4846 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:26:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:15,622 INFO L93 Difference]: Finished difference Result 2401 states and 7734 transitions. [2021-06-05 16:26:15,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:26:15,625 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 16:26:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:15,628 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 16:26:15,628 INFO L226 Difference]: Without dead ends: 2382 [2021-06-05 16:26:15,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 759.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1218, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:26:15,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-05 16:26:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1416. [2021-06-05 16:26:15,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.4063604240282683) internal successors, (4820), 1415 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4820 transitions. [2021-06-05 16:26:15,650 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4820 transitions. Word has length 26 [2021-06-05 16:26:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:15,650 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4820 transitions. [2021-06-05 16:26:15,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:26:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4820 transitions. [2021-06-05 16:26:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:15,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:15,652 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 16:26:15,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2499,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:15,852 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash 830546731, now seen corresponding path program 46 times [2021-06-05 16:26:15,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:15,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260577237] [2021-06-05 16:26:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:16,027 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 16:26:16,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:16,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260577237] [2021-06-05 16:26:16,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260577237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:16,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879274675] [2021-06-05 16:26:16,027 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 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 16:26:16,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:26:16,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:16,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:26:16,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:16,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:16,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:16,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 37 [2021-06-05 16:26:16,181 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:16,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:16,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:16,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:16,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:16,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:16,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 27 [2021-06-05 16:26:16,192 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:16,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:16,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:16,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:26:16,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:16,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:16,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:16,213 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:26:16,230 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 16:26:16,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879274675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:16,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:16,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:26:16,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088374942] [2021-06-05 16:26:16,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:26:16,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:16,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:26:16,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:26:16,231 INFO L87 Difference]: Start difference. First operand 1416 states and 4820 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:26:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:17,647 INFO L93 Difference]: Finished difference Result 3014 states and 9632 transitions. [2021-06-05 16:26:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:26:17,647 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 16:26:17,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:17,651 INFO L225 Difference]: With dead ends: 3014 [2021-06-05 16:26:17,652 INFO L226 Difference]: Without dead ends: 2978 [2021-06-05 16:26:17,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1146.0ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:26:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2021-06-05 16:26:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 1549. [2021-06-05 16:26:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.4237726098191215) internal successors, (5300), 1548 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5300 transitions. [2021-06-05 16:26:17,677 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5300 transitions. Word has length 26 [2021-06-05 16:26:17,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:17,677 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 5300 transitions. [2021-06-05 16:26:17,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:26:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5300 transitions. [2021-06-05 16:26:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:17,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:17,679 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 16:26:17,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2519,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:17,879 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:17,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1630771913, now seen corresponding path program 47 times [2021-06-05 16:26:17,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:17,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526417188] [2021-06-05 16:26:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:18,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:18,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526417188] [2021-06-05 16:26:18,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526417188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:18,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752920850] [2021-06-05 16:26:18,044 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 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 16:26:18,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:26:18,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:26:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:18,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:18,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:18,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-05 16:26:18,250 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:18,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:18,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:18,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:18,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:18,284 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 37 treesize of output 55 [2021-06-05 16:26:18,356 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:18,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:18,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:18,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:26:18,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:26:18,981 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2021-06-05 16:26:18,981 INFO L628 ElimStorePlain]: treesize reduction 248, result has 85.3 percent of original size [2021-06-05 16:26:19,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:19,169 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:48 [2021-06-05 16:26:19,216 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 16:26:19,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752920850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:19,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:19,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 16:26:19,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816316821] [2021-06-05 16:26:19,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:26:19,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:19,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:26:19,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:26:19,217 INFO L87 Difference]: Start difference. First operand 1549 states and 5300 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:26:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:20,946 INFO L93 Difference]: Finished difference Result 3396 states and 10730 transitions. [2021-06-05 16:26:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:26:20,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 16:26:20,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:20,951 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 16:26:20,952 INFO L226 Difference]: Without dead ends: 3339 [2021-06-05 16:26:20,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1411.5ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:26:20,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-06-05 16:26:20,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 1572. [2021-06-05 16:26:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.426479949077021) internal successors, (5383), 1571 states have internal predecessors, (5383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5383 transitions. [2021-06-05 16:26:20,979 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5383 transitions. Word has length 26 [2021-06-05 16:26:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:20,980 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5383 transitions. [2021-06-05 16:26:20,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 16:26:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5383 transitions. [2021-06-05 16:26:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:20,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:20,982 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 16:26:21,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2520 [2021-06-05 16:26:21,182 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:21,182 INFO L82 PathProgramCache]: Analyzing trace with hash 219730783, now seen corresponding path program 29 times [2021-06-05 16:26:21,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:21,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398425975] [2021-06-05 16:26:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:21,335 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 16:26:21,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:21,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398425975] [2021-06-05 16:26:21,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398425975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:21,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938572110] [2021-06-05 16:26:21,335 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 16:26:21,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:26:21,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:26:21,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:21,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:21,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:21,554 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:26:21,555 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:21,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:21,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:21,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:21,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:26:21,565 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:21,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:21,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:26:21,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:21,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:21,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:21,585 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:26:21,600 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 16:26:21,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938572110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:21,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:21,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:26:21,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785586531] [2021-06-05 16:26:21,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:26:21,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:21,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:26:21,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:26:21,601 INFO L87 Difference]: Start difference. First operand 1572 states and 5383 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:26:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:22,484 INFO L93 Difference]: Finished difference Result 1983 states and 6657 transitions. [2021-06-05 16:26:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:26:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:26:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:22,487 INFO L225 Difference]: With dead ends: 1983 [2021-06-05 16:26:22,487 INFO L226 Difference]: Without dead ends: 1968 [2021-06-05 16:26:22,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 639.1ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:26:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-05 16:26:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1583. [2021-06-05 16:26:22,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4260429835651074) internal successors, (5420), 1582 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5420 transitions. [2021-06-05 16:26:22,508 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5420 transitions. Word has length 26 [2021-06-05 16:26:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:22,508 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5420 transitions. [2021-06-05 16:26:22,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 16:26:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5420 transitions. [2021-06-05 16:26:22,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:22,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:22,510 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 16:26:22,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2633,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:22,710 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1397801997, now seen corresponding path program 30 times [2021-06-05 16:26:22,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:22,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597157627] [2021-06-05 16:26:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:22,845 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 16:26:22,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:22,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597157627] [2021-06-05 16:26:22,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597157627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:22,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262842920] [2021-06-05 16:26:22,845 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 16:26:22,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:26:22,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:22,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:26:22,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:23,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:23,019 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 16:26:23,056 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:23,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:23,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:23,084 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:26:23,114 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:23,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:23,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:23,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:26:23,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:26:23,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:23,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:23,283 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:165 [2021-06-05 16:26:23,371 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 16:26:23,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262842920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:23,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:23,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:26:23,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132641068] [2021-06-05 16:26:23,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:26:23,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:23,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:26:23,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:26:23,372 INFO L87 Difference]: Start difference. First operand 1583 states and 5420 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:26:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:24,842 INFO L93 Difference]: Finished difference Result 2815 states and 9082 transitions. [2021-06-05 16:26:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:26:24,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:26:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:24,846 INFO L225 Difference]: With dead ends: 2815 [2021-06-05 16:26:24,846 INFO L226 Difference]: Without dead ends: 2777 [2021-06-05 16:26:24,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1130.9ms TimeCoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:26:24,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-06-05 16:26:24,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 1586. [2021-06-05 16:26:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.4227129337539433) internal successors, (5425), 1585 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5425 transitions. [2021-06-05 16:26:24,870 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5425 transitions. Word has length 26 [2021-06-05 16:26:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:24,870 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 5425 transitions. [2021-06-05 16:26:24,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:26:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5425 transitions. [2021-06-05 16:26:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:24,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:24,872 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 16:26:25,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2634 [2021-06-05 16:26:25,075 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:25,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1207222395, now seen corresponding path program 31 times [2021-06-05 16:26:25,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:25,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046910673] [2021-06-05 16:26:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:25,209 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 16:26:25,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:25,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046910673] [2021-06-05 16:26:25,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046910673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:25,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598474308] [2021-06-05 16:26:25,209 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 16:26:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:25,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:26:25,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:25,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:25,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:25,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 43 [2021-06-05 16:26:25,363 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:25,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:25,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:25,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:25,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:26:25,395 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:25,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:25,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:25,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:26:25,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:26:25,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:25,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:25,491 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 16:26:25,525 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 16:26:25,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598474308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:25,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:25,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:26:25,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539209199] [2021-06-05 16:26:25,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:26:25,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:25,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:26:25,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:26:25,526 INFO L87 Difference]: Start difference. First operand 1586 states and 5425 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:26:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:26,205 INFO L93 Difference]: Finished difference Result 2234 states and 7413 transitions. [2021-06-05 16:26:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:26:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 16:26:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:26,208 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 16:26:26,208 INFO L226 Difference]: Without dead ends: 2209 [2021-06-05 16:26:26,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 576.1ms TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:26:26,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-06-05 16:26:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1580. [2021-06-05 16:26:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4243191893603546) internal successors, (5407), 1579 states have internal predecessors, (5407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5407 transitions. [2021-06-05 16:26:26,227 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5407 transitions. Word has length 26 [2021-06-05 16:26:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:26,227 INFO L482 AbstractCegarLoop]: Abstraction has 1580 states and 5407 transitions. [2021-06-05 16:26:26,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:26:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5407 transitions. [2021-06-05 16:26:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:26,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:26,229 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 16:26:26,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-06-05 16:26:26,430 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:26,430 INFO L82 PathProgramCache]: Analyzing trace with hash -189976303, now seen corresponding path program 48 times [2021-06-05 16:26:26,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:26,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615451253] [2021-06-05 16:26:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:26,657 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 16:26:26,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:26,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615451253] [2021-06-05 16:26:26,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615451253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:26,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580849512] [2021-06-05 16:26:26,658 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 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 16:26:26,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:26:26,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:26,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:26:26,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:26,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:26,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:26,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:26,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 37 [2021-06-05 16:26:26,842 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:26,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:26,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:26,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:26,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:26,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 27 [2021-06-05 16:26:26,853 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:26,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:26,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:26,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:26:26,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:26,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:26,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:26,873 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:26:26,884 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 16:26:26,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580849512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:26,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:26,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:26:26,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968852921] [2021-06-05 16:26:26,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:26:26,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:26,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:26:26,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:26:26,885 INFO L87 Difference]: Start difference. First operand 1580 states and 5407 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:26:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:28,130 INFO L93 Difference]: Finished difference Result 2036 states and 6741 transitions. [2021-06-05 16:26:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:26:28,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:26:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:28,134 INFO L225 Difference]: With dead ends: 2036 [2021-06-05 16:26:28,134 INFO L226 Difference]: Without dead ends: 2014 [2021-06-05 16:26:28,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1183.8ms TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:26:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-05 16:26:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1572. [2021-06-05 16:26:28,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.4239338001273074) internal successors, (5379), 1571 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5379 transitions. [2021-06-05 16:26:28,153 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5379 transitions. Word has length 26 [2021-06-05 16:26:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:28,153 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5379 transitions. [2021-06-05 16:26:28,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 16:26:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5379 transitions. [2021-06-05 16:26:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:26:28,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:28,155 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 16:26:28,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:28,357 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash 735517563, now seen corresponding path program 49 times [2021-06-05 16:26:28,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:28,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132244443] [2021-06-05 16:26:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:28,614 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 16:26:28,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:28,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132244443] [2021-06-05 16:26:28,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132244443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:28,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648622501] [2021-06-05 16:26:28,615 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 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 16:26:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:28,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:26:28,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:31,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:31,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:31,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:31,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:31,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 37 [2021-06-05 16:26:31,575 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:31,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:31,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:31,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:31,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:31,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 27 [2021-06-05 16:26:31,588 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:31,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:31,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:31,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:26:31,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:31,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:31,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:31,611 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:26:31,629 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 16:26:31,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648622501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:31,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:31,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:26:31,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370192564] [2021-06-05 16:26:31,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:26:31,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:31,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:26:31,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=212, Unknown=3, NotChecked=0, Total=272 [2021-06-05 16:26:31,630 INFO L87 Difference]: Start difference. First operand 1572 states and 5379 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 16:27:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:27:16,250 INFO L93 Difference]: Finished difference Result 2238 states and 7416 transitions. [2021-06-05 16:27:16,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:27:16,250 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 16:27:16,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:27:16,253 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 16:27:16,253 INFO L226 Difference]: Without dead ends: 2223 [2021-06-05 16:27:16,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 12588.7ms TimeCoverageRelationStatistics Valid=421, Invalid=1637, Unknown=12, NotChecked=0, Total=2070 [2021-06-05 16:27:16,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-06-05 16:27:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1572. [2021-06-05 16:27:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.4239338001273074) internal successors, (5379), 1571 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5379 transitions. [2021-06-05 16:27:16,273 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5379 transitions. Word has length 26 [2021-06-05 16:27:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:27:16,273 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5379 transitions. [2021-06-05 16:27:16,273 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 16:27:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5379 transitions. [2021-06-05 16:27:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:27:16,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:27:16,275 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 16:27:16,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2715,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:16,476 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:27:16,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:27:16,476 INFO L82 PathProgramCache]: Analyzing trace with hash -442386977, now seen corresponding path program 50 times [2021-06-05 16:27:16,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:27:16,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817686421] [2021-06-05 16:27:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:27:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:16,694 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 16:27:16,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:27:16,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817686421] [2021-06-05 16:27:16,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817686421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:16,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925458777] [2021-06-05 16:27:16,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:27:16,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:27:16,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:27:16,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:27:16,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:16,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:16,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:16,875 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 47 treesize of output 73 [2021-06-05 16:27:17,045 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:17,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:17,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:17,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 63 [2021-06-05 16:27:17,243 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:17,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:17,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:17,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:27:17,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:27:18,068 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 126 [2021-06-05 16:27:18,069 INFO L628 ElimStorePlain]: treesize reduction 666, result has 70.8 percent of original size [2021-06-05 16:27:18,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:27:18,890 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:58, output treesize:20 [2021-06-05 16:27:18,952 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 16:27:18,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925458777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:18,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:27:18,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 16:27:18,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238886003] [2021-06-05 16:27:18,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:27:18,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:27:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:27:18,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:27:18,953 INFO L87 Difference]: Start difference. First operand 1572 states and 5379 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 16:27:22,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:27:22,010 INFO L93 Difference]: Finished difference Result 2935 states and 9380 transitions. [2021-06-05 16:27:22,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:27:22,010 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 16:27:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:27:22,014 INFO L225 Difference]: With dead ends: 2935 [2021-06-05 16:27:22,014 INFO L226 Difference]: Without dead ends: 2873 [2021-06-05 16:27:22,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 2532.9ms TimeCoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:27:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-06-05 16:27:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 1625. [2021-06-05 16:27:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.4224137931034484) internal successors, (5558), 1624 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5558 transitions. [2021-06-05 16:27:22,040 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5558 transitions. Word has length 26 [2021-06-05 16:27:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:27:22,040 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5558 transitions. [2021-06-05 16:27:22,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 16:27:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5558 transitions. [2021-06-05 16:27:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:27:22,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:27:22,042 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 16:27:22,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2716,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:22,243 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:27:22,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:27:22,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1988624133, now seen corresponding path program 51 times [2021-06-05 16:27:22,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:27:22,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939241681] [2021-06-05 16:27:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:27:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:22,460 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 16:27:22,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:27:22,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939241681] [2021-06-05 16:27:22,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939241681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:22,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451057551] [2021-06-05 16:27:22,460 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 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 16:27:22,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:27:22,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:27:22,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:27:22,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:22,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:22,690 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 83 [2021-06-05 16:27:23,045 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:23,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:23,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:23,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 73 [2021-06-05 16:27:23,412 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:23,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:23,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:23,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:27:23,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:27:24,473 WARN L205 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 138 [2021-06-05 16:27:24,473 INFO L628 ElimStorePlain]: treesize reduction 678, result has 71.9 percent of original size [2021-06-05 16:27:25,331 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 278 [2021-06-05 16:27:25,820 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 216 [2021-06-05 16:27:26,905 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 189 [2021-06-05 16:27:27,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:27:27,086 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:64, output treesize:2790 [2021-06-05 16:27:27,731 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 44 [2021-06-05 16:27:27,855 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 16:27:27,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451057551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:27,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:27:27,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 16:27:27,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239059626] [2021-06-05 16:27:27,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:27:27,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:27:27,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:27:27,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:27:27,856 INFO L87 Difference]: Start difference. First operand 1625 states and 5558 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 16:27:28,536 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 16:27:30,245 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 16:27:30,687 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-06-05 16:27:31,210 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-06-05 16:27:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:27:31,269 INFO L93 Difference]: Finished difference Result 2782 states and 8999 transitions. [2021-06-05 16:27:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:27:31,270 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 16:27:31,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:27:31,274 INFO L225 Difference]: With dead ends: 2782 [2021-06-05 16:27:31,274 INFO L226 Difference]: Without dead ends: 2722 [2021-06-05 16:27:31,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 3224.0ms TimeCoverageRelationStatistics Valid=603, Invalid=2937, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:27:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2021-06-05 16:27:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 1634. [2021-06-05 16:27:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.425597060624617) internal successors, (5594), 1633 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5594 transitions. [2021-06-05 16:27:31,297 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5594 transitions. Word has length 26 [2021-06-05 16:27:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:27:31,297 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 5594 transitions. [2021-06-05 16:27:31,297 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 16:27:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5594 transitions. [2021-06-05 16:27:31,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:27:31,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:27:31,299 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] [2021-06-05 16:27:31,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-06-05 16:27:31,499 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:27:31,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:27:31,499 INFO L82 PathProgramCache]: Analyzing trace with hash 521488947, now seen corresponding path program 52 times [2021-06-05 16:27:31,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:27:31,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261890357] [2021-06-05 16:27:31,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:27:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:31,726 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 16:27:31,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:27:31,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261890357] [2021-06-05 16:27:31,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261890357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:31,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305543677] [2021-06-05 16:27:31,727 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 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 16:27:31,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:27:31,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:27:31,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:27:31,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:36,223 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 16:27:36,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:36,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:36,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:36,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 37 [2021-06-05 16:27:36,248 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:36,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:36,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:36,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:36,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:36,258 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 37 treesize of output 27 [2021-06-05 16:27:36,259 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:36,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:36,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:36,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:27:36,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:36,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:36,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:27:36,281 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:27:36,297 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 16:27:36,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305543677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:36,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:27:36,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:27:36,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3846198] [2021-06-05 16:27:36,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:27:36,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:27:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:27:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=215, Unknown=3, NotChecked=0, Total=272 [2021-06-05 16:27:36,298 INFO L87 Difference]: Start difference. First operand 1634 states and 5594 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 16:27:38,749 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 16:27:38,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:27:38,837 INFO L93 Difference]: Finished difference Result 2185 states and 7232 transitions. [2021-06-05 16:27:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:27:38,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-05 16:27:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:27:38,840 INFO L225 Difference]: With dead ends: 2185 [2021-06-05 16:27:38,840 INFO L226 Difference]: Without dead ends: 2170 [2021-06-05 16:27:38,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 6772.9ms TimeCoverageRelationStatistics Valid=350, Invalid=1453, Unknown=3, NotChecked=0, Total=1806 [2021-06-05 16:27:38,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-06-05 16:27:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1638. [2021-06-05 16:27:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.4257788637751987) internal successors, (5608), 1637 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5608 transitions. [2021-06-05 16:27:38,862 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5608 transitions. Word has length 26 [2021-06-05 16:27:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:27:38,865 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5608 transitions. [2021-06-05 16:27:38,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 16:27:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5608 transitions. [2021-06-05 16:27:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:27:38,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:27:38,868 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 16:27:39,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3488,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:39,081 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:27:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:27:39,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2074580369, now seen corresponding path program 53 times [2021-06-05 16:27:39,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:27:39,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823368943] [2021-06-05 16:27:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:27:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:39,320 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 16:27:39,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:27:39,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823368943] [2021-06-05 16:27:39,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823368943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:39,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775972594] [2021-06-05 16:27:39,322 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 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 16:27:39,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:27:39,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:27:39,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:27:39,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:48,953 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 16:27:48,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:48,987 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 16:27:48,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 219 [2021-06-05 16:27:49,056 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:49,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:49,105 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 16:27:49,105 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 223 treesize of output 199 [2021-06-05 16:27:49,268 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:49,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:49,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:49,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 197 treesize of output 181 [2021-06-05 16:27:49,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:50,084 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-06-05 16:27:50,084 INFO L628 ElimStorePlain]: treesize reduction 162, result has 92.8 percent of original size [2021-06-05 16:27:50,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:27:50,970 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:245, output treesize:315 [2021-06-05 16:27:51,041 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 16:27:51,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775972594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:51,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:27:51,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 16:27:51,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107199370] [2021-06-05 16:27:51,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:27:51,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:27:51,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:27:51,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=350, Unknown=5, NotChecked=0, Total=420 [2021-06-05 16:27:51,042 INFO L87 Difference]: Start difference. First operand 1638 states and 5608 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 16:28:54,834 WARN L205 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-05 16:29:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:07,061 INFO L93 Difference]: Finished difference Result 2374 states and 7924 transitions. [2021-06-05 16:29:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:29:07,061 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 16:29:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:07,064 INFO L225 Difference]: With dead ends: 2374 [2021-06-05 16:29:07,064 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 16:29:07,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 19563.4ms TimeCoverageRelationStatistics Valid=305, Invalid=1580, Unknown=7, NotChecked=0, Total=1892 [2021-06-05 16:29:07,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 16:29:07,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1638. [2021-06-05 16:29:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.4257788637751987) internal successors, (5608), 1637 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5608 transitions. [2021-06-05 16:29:07,085 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5608 transitions. Word has length 26 [2021-06-05 16:29:07,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:07,085 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5608 transitions. [2021-06-05 16:29:07,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 16:29:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5608 transitions. [2021-06-05 16:29:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:07,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:07,087 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 16:29:07,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3489 [2021-06-05 16:29:07,293 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:07,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1346907209, now seen corresponding path program 54 times [2021-06-05 16:29:07,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:07,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498200620] [2021-06-05 16:29:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:07,460 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 16:29:07,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:07,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498200620] [2021-06-05 16:29:07,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498200620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:07,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791777613] [2021-06-05 16:29:07,460 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 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 16:29:07,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:29:07,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:07,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:29:07,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:07,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:07,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:07,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:07,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 16:29:07,701 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:07,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:07,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:07,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:07,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:07,735 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 53 [2021-06-05 16:29:07,820 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:07,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:07,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:07,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:29:08,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:08,754 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 107 [2021-06-05 16:29:08,754 INFO L628 ElimStorePlain]: treesize reduction 1132, result has 46.5 percent of original size [2021-06-05 16:29:08,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:08,988 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-05 16:29:09,023 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 16:29:09,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791777613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:09,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:09,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-05 16:29:09,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557083859] [2021-06-05 16:29:09,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:29:09,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:29:09,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:29:09,024 INFO L87 Difference]: Start difference. First operand 1638 states and 5608 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 16:29:10,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:10,842 INFO L93 Difference]: Finished difference Result 3261 states and 10301 transitions. [2021-06-05 16:29:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:29:10,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 16:29:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:10,846 INFO L225 Difference]: With dead ends: 3261 [2021-06-05 16:29:10,846 INFO L226 Difference]: Without dead ends: 3214 [2021-06-05 16:29:10,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1413.2ms TimeCoverageRelationStatistics Valid=656, Invalid=3126, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:29:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-06-05 16:29:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 1647. [2021-06-05 16:29:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.4264884568651275) internal successors, (5640), 1646 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5640 transitions. [2021-06-05 16:29:10,872 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5640 transitions. Word has length 26 [2021-06-05 16:29:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:10,872 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5640 transitions. [2021-06-05 16:29:10,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 16:29:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5640 transitions. [2021-06-05 16:29:10,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:10,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:10,874 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 16:29:11,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3813,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:11,074 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash -916217703, now seen corresponding path program 55 times [2021-06-05 16:29:11,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:11,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741394070] [2021-06-05 16:29:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:11,293 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 16:29:11,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:11,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741394070] [2021-06-05 16:29:11,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741394070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:11,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176338264] [2021-06-05 16:29:11,294 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 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 16:29:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:11,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:29:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:11,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:11,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:11,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:11,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 16:29:11,515 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:11,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:11,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:11,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:11,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:11,548 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 53 [2021-06-05 16:29:11,632 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:11,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:11,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:11,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:29:11,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:12,407 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 108 [2021-06-05 16:29:12,407 INFO L628 ElimStorePlain]: treesize reduction 1472, result has 39.4 percent of original size [2021-06-05 16:29:12,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:12,576 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-05 16:29:12,613 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 16:29:12,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176338264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:12,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:12,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:29:12,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522532373] [2021-06-05 16:29:12,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:12,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:12,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:12,614 INFO L87 Difference]: Start difference. First operand 1647 states and 5640 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 16:29:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:14,796 INFO L93 Difference]: Finished difference Result 2920 states and 9365 transitions. [2021-06-05 16:29:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:29:14,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-06-05 16:29:14,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:14,801 INFO L225 Difference]: With dead ends: 2920 [2021-06-05 16:29:14,801 INFO L226 Difference]: Without dead ends: 2886 [2021-06-05 16:29:14,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1980.8ms TimeCoverageRelationStatistics Valid=698, Invalid=2494, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:29:14,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2021-06-05 16:29:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 1654. [2021-06-05 16:29:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.434966727162734) internal successors, (5678), 1653 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5678 transitions. [2021-06-05 16:29:14,825 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5678 transitions. Word has length 26 [2021-06-05 16:29:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:14,825 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5678 transitions. [2021-06-05 16:29:14,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 16:29:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5678 transitions. [2021-06-05 16:29:14,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:14,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:14,827 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 16:29:15,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3947 [2021-06-05 16:29:15,037 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:15,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:15,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1471656619, now seen corresponding path program 32 times [2021-06-05 16:29:15,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:15,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898932487] [2021-06-05 16:29:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:15,139 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 16:29:15,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:15,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898932487] [2021-06-05 16:29:15,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898932487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:15,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351648578] [2021-06-05 16:29:15,139 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 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 16:29:15,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:15,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:15,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:29:15,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:15,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:15,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:15,307 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 47 treesize of output 47 [2021-06-05 16:29:15,323 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:15,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:15,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:15,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:15,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:15,343 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 37 treesize of output 37 [2021-06-05 16:29:15,359 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:15,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:15,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:15,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:15,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:15,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:15,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:15,465 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:41 [2021-06-05 16:29:15,508 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 16:29:15,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351648578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:15,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:15,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:29:15,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52700197] [2021-06-05 16:29:15,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:15,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:15,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:15,509 INFO L87 Difference]: Start difference. First operand 1654 states and 5678 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) 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 16:29:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:16,390 INFO L93 Difference]: Finished difference Result 2114 states and 7070 transitions. [2021-06-05 16:29:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:29:16,391 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:29:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:16,394 INFO L225 Difference]: With dead ends: 2114 [2021-06-05 16:29:16,394 INFO L226 Difference]: Without dead ends: 2099 [2021-06-05 16:29:16,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:29:16,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-06-05 16:29:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1645. [2021-06-05 16:29:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.431873479318735) internal successors, (5642), 1644 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5642 transitions. [2021-06-05 16:29:16,413 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5642 transitions. Word has length 26 [2021-06-05 16:29:16,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:16,414 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5642 transitions. [2021-06-05 16:29:16,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:29:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5642 transitions. [2021-06-05 16:29:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:16,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:16,416 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 16:29:16,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4081 [2021-06-05 16:29:16,616 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:16,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1471507747, now seen corresponding path program 33 times [2021-06-05 16:29:16,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:16,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933648898] [2021-06-05 16:29:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:16,739 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 16:29:16,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:16,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933648898] [2021-06-05 16:29:16,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933648898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:16,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132178309] [2021-06-05 16:29:16,739 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 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 16:29:16,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:29:16,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:29:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:16,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:16,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:29:16,968 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:16,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:16,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:16,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:16,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:29:16,978 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:16,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:16,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:16,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:29:16,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:16,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:16,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:16,999 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:29:17,014 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 16:29:17,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132178309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:17,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:17,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:29:17,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975572591] [2021-06-05 16:29:17,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:17,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:17,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:17,015 INFO L87 Difference]: Start difference. First operand 1645 states and 5642 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:17,700 INFO L93 Difference]: Finished difference Result 2294 states and 7660 transitions. [2021-06-05 16:29:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:29:17,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-05 16:29:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:17,703 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 16:29:17,703 INFO L226 Difference]: Without dead ends: 2279 [2021-06-05 16:29:17,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:29:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-06-05 16:29:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1647. [2021-06-05 16:29:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.431956257594168) internal successors, (5649), 1646 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5649 transitions. [2021-06-05 16:29:17,724 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5649 transitions. Word has length 26 [2021-06-05 16:29:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:17,724 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5649 transitions. [2021-06-05 16:29:17,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5649 transitions. [2021-06-05 16:29:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:17,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:17,726 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 16:29:17,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4099,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:17,927 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash -146025033, now seen corresponding path program 34 times [2021-06-05 16:29:17,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:17,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239356683] [2021-06-05 16:29:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:18,047 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 16:29:18,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:18,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239356683] [2021-06-05 16:29:18,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239356683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:18,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987240257] [2021-06-05 16:29:18,047 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 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 16:29:18,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:29:18,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:18,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:29:18,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:18,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:18,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:18,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 43 [2021-06-05 16:29:18,241 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:18,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:18,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:18,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:18,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:29:18,278 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:18,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:18,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:18,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:18,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:18,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:18,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:18,373 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 16:29:18,413 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 16:29:18,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987240257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:18,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:18,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:29:18,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208559779] [2021-06-05 16:29:18,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:18,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:18,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:18,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:18,414 INFO L87 Difference]: Start difference. First operand 1647 states and 5649 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:29:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:19,141 INFO L93 Difference]: Finished difference Result 2530 states and 8380 transitions. [2021-06-05 16:29:19,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:29:19,141 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-05 16:29:19,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:19,145 INFO L225 Difference]: With dead ends: 2530 [2021-06-05 16:29:19,145 INFO L226 Difference]: Without dead ends: 2515 [2021-06-05 16:29:19,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 636.5ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:29:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-06-05 16:29:19,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 1638. [2021-06-05 16:29:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.427000610873549) internal successors, (5610), 1637 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5610 transitions. [2021-06-05 16:29:19,169 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5610 transitions. Word has length 26 [2021-06-05 16:29:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:19,169 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5610 transitions. [2021-06-05 16:29:19,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:29:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5610 transitions. [2021-06-05 16:29:19,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:19,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:19,171 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 16:29:19,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4100,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:19,372 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash -628905925, now seen corresponding path program 35 times [2021-06-05 16:29:19,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:19,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088682568] [2021-06-05 16:29:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:19,507 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 16:29:19,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:19,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088682568] [2021-06-05 16:29:19,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088682568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:19,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783827244] [2021-06-05 16:29:19,508 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 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 16:29:19,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:29:19,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:19,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:29:19,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:19,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:19,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:19,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:29:19,690 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:19,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:19,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:19,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:19,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:29:19,703 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:19,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:19,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:19,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:29:19,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:19,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:19,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:19,727 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:29:19,740 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 16:29:19,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783827244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:19,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:19,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:29:19,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478656312] [2021-06-05 16:29:19,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:19,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:19,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:19,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:19,741 INFO L87 Difference]: Start difference. First operand 1638 states and 5610 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:29:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:20,070 INFO L93 Difference]: Finished difference Result 2064 states and 6895 transitions. [2021-06-05 16:29:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:29:20,070 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:29:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:20,073 INFO L225 Difference]: With dead ends: 2064 [2021-06-05 16:29:20,073 INFO L226 Difference]: Without dead ends: 2043 [2021-06-05 16:29:20,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:29:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-06-05 16:29:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1638. [2021-06-05 16:29:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.427000610873549) internal successors, (5610), 1637 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5610 transitions. [2021-06-05 16:29:20,094 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5610 transitions. Word has length 26 [2021-06-05 16:29:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:20,094 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5610 transitions. [2021-06-05 16:29:20,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:29:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5610 transitions. [2021-06-05 16:29:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:20,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:20,096 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 16:29:20,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4119,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:20,312 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:20,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:20,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2009149475, now seen corresponding path program 36 times [2021-06-05 16:29:20,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:20,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361245991] [2021-06-05 16:29:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:20,434 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 16:29:20,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:20,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361245991] [2021-06-05 16:29:20,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361245991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:20,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447565222] [2021-06-05 16:29:20,434 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 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 16:29:20,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:29:20,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:29:20,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:20,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:20,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:20,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 16:29:20,668 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:20,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:20,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:20,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:20,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:29:20,729 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:20,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:20,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:20,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:20,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:20,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:20,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:29:20,874 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:57, output treesize:173 [2021-06-05 16:29:20,971 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 16:29:20,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447565222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:20,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:20,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:29:20,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793431412] [2021-06-05 16:29:20,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:20,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:20,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:20,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:20,972 INFO L87 Difference]: Start difference. First operand 1638 states and 5610 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:23,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:23,576 INFO L93 Difference]: Finished difference Result 2222 states and 7252 transitions. [2021-06-05 16:29:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:29:23,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-05 16:29:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:23,580 INFO L225 Difference]: With dead ends: 2222 [2021-06-05 16:29:23,580 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 16:29:23,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 873.5ms TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:29:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 16:29:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1632. [2021-06-05 16:29:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.4267320662170446) internal successors, (5589), 1631 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5589 transitions. [2021-06-05 16:29:23,600 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5589 transitions. Word has length 26 [2021-06-05 16:29:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:23,600 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 5589 transitions. [2021-06-05 16:29:23,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5589 transitions. [2021-06-05 16:29:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:23,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:23,602 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 16:29:23,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-06-05 16:29:23,803 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:23,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:23,803 INFO L82 PathProgramCache]: Analyzing trace with hash -816683043, now seen corresponding path program 37 times [2021-06-05 16:29:23,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:23,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517326646] [2021-06-05 16:29:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:23,922 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 16:29:23,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:23,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517326646] [2021-06-05 16:29:23,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517326646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:23,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929957427] [2021-06-05 16:29:23,922 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 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 16:29:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:23,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:29:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:24,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:24,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:24,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 43 [2021-06-05 16:29:24,082 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:24,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:24,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:24,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:24,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:29:24,114 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:24,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:24,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:24,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:24,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:24,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:24,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:24,209 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 16:29:24,243 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 16:29:24,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929957427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:24,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:24,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:29:24,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222974680] [2021-06-05 16:29:24,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:29:24,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:24,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:29:24,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:29:24,243 INFO L87 Difference]: Start difference. First operand 1632 states and 5589 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 16:29:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:24,508 INFO L93 Difference]: Finished difference Result 2129 states and 7065 transitions. [2021-06-05 16:29:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:29:24,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 26 [2021-06-05 16:29:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:24,511 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 16:29:24,511 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 16:29:24,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:29:24,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 16:29:24,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1626. [2021-06-05 16:29:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.420923076923077) internal successors, (5559), 1625 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5559 transitions. [2021-06-05 16:29:24,531 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5559 transitions. Word has length 26 [2021-06-05 16:29:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:24,531 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5559 transitions. [2021-06-05 16:29:24,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 16:29:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5559 transitions. [2021-06-05 16:29:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:24,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:24,533 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 16:29:24,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4170,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:24,734 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:24,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:24,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1649350967, now seen corresponding path program 38 times [2021-06-05 16:29:24,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:24,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957836529] [2021-06-05 16:29:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:24,864 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 16:29:24,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:24,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957836529] [2021-06-05 16:29:24,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957836529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:24,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43270505] [2021-06-05 16:29:24,864 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 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 16:29:24,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:24,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:24,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:29:24,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:25,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:25,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:25,032 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 43 treesize of output 35 [2021-06-05 16:29:25,033 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:25,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:25,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:25,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:25,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:29:25,043 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:25,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:25,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:25,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:29:25,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:25,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:25,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:25,065 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:29:25,081 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 16:29:25,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43270505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:25,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:25,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:29:25,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801979785] [2021-06-05 16:29:25,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:29:25,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:25,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:29:25,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:29:25,081 INFO L87 Difference]: Start difference. First operand 1626 states and 5559 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:29:25,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:25,299 INFO L93 Difference]: Finished difference Result 1701 states and 5724 transitions. [2021-06-05 16:29:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:29:25,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 16:29:25,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:25,302 INFO L225 Difference]: With dead ends: 1701 [2021-06-05 16:29:25,302 INFO L226 Difference]: Without dead ends: 1682 [2021-06-05 16:29:25,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-06-05 16:29:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1618. [2021-06-05 16:29:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.419294990723562) internal successors, (5529), 1617 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5529 transitions. [2021-06-05 16:29:25,319 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5529 transitions. Word has length 26 [2021-06-05 16:29:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:25,319 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5529 transitions. [2021-06-05 16:29:25,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 16:29:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5529 transitions. [2021-06-05 16:29:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:25,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:25,321 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 16:29:25,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-06-05 16:29:25,522 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:25,522 INFO L82 PathProgramCache]: Analyzing trace with hash -497941569, now seen corresponding path program 39 times [2021-06-05 16:29:25,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:25,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367027719] [2021-06-05 16:29:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:25,651 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 16:29:25,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:25,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367027719] [2021-06-05 16:29:25,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367027719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:25,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098258975] [2021-06-05 16:29:25,652 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 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 16:29:25,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:29:25,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:25,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:29:25,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:26,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:26,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 51 [2021-06-05 16:29:26,800 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:26,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:26,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:26,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:26,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:29:26,869 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:26,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:26,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:26,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:26,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:26,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:27,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:29:27,014 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:57, output treesize:154 [2021-06-05 16:29:27,108 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 16:29:27,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098258975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:27,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:27,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 16:29:27,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100089173] [2021-06-05 16:29:27,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:27,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:27,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:27,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=251, Unknown=1, NotChecked=0, Total=306 [2021-06-05 16:29:27,109 INFO L87 Difference]: Start difference. First operand 1618 states and 5529 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:39,358 INFO L93 Difference]: Finished difference Result 1845 states and 6184 transitions. [2021-06-05 16:29:39,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:29:39,358 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:29:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:39,361 INFO L225 Difference]: With dead ends: 1845 [2021-06-05 16:29:39,361 INFO L226 Difference]: Without dead ends: 1820 [2021-06-05 16:29:39,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 4656.3ms TimeCoverageRelationStatistics Valid=129, Invalid=624, Unknown=3, NotChecked=0, Total=756 [2021-06-05 16:29:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-06-05 16:29:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1600. [2021-06-05 16:29:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.424015009380863) internal successors, (5475), 1599 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5475 transitions. [2021-06-05 16:29:39,380 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5475 transitions. Word has length 26 [2021-06-05 16:29:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:39,380 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5475 transitions. [2021-06-05 16:29:39,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5475 transitions. [2021-06-05 16:29:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:39,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:39,382 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 16:29:39,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4189 [2021-06-05 16:29:39,583 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:39,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1031976481, now seen corresponding path program 40 times [2021-06-05 16:29:39,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:39,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002479799] [2021-06-05 16:29:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:39,708 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 16:29:39,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:39,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002479799] [2021-06-05 16:29:39,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002479799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:39,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865788844] [2021-06-05 16:29:39,708 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 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 16:29:39,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:29:39,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:39,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:29:39,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:39,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:39,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:39,916 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 43 treesize of output 35 [2021-06-05 16:29:39,917 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:39,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:39,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:39,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:39,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:29:39,928 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:39,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:39,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:39,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:29:39,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:39,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:39,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:39,951 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:29:39,966 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 16:29:39,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865788844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:39,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:39,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:29:39,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393756669] [2021-06-05 16:29:39,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:39,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:39,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:39,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:39,967 INFO L87 Difference]: Start difference. First operand 1600 states and 5475 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:40,392 INFO L93 Difference]: Finished difference Result 2102 states and 6991 transitions. [2021-06-05 16:29:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:29:40,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-05 16:29:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:40,395 INFO L225 Difference]: With dead ends: 2102 [2021-06-05 16:29:40,395 INFO L226 Difference]: Without dead ends: 2087 [2021-06-05 16:29:40,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 427.2ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:29:40,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-06-05 16:29:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1595. [2021-06-05 16:29:40,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.422835633626098) internal successors, (5456), 1594 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5456 transitions. [2021-06-05 16:29:40,413 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5456 transitions. Word has length 26 [2021-06-05 16:29:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:40,413 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 5456 transitions. [2021-06-05 16:29:40,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5456 transitions. [2021-06-05 16:29:40,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:40,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:40,415 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 16:29:40,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4243 [2021-06-05 16:29:40,629 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash -44484869, now seen corresponding path program 41 times [2021-06-05 16:29:40,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:40,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612455369] [2021-06-05 16:29:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:40,735 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 16:29:40,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:40,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612455369] [2021-06-05 16:29:40,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612455369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:40,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743291648] [2021-06-05 16:29:40,735 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 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 16:29:40,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:29:40,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:40,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:29:40,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:45,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:45,266 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 43 treesize of output 43 [2021-06-05 16:29:45,282 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:45,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:45,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:45,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:45,302 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 35 treesize of output 35 [2021-06-05 16:29:45,318 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:45,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:45,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:45,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:45,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:45,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:45,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:45,411 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:40 [2021-06-05 16:29:45,450 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 16:29:45,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743291648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:45,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:45,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:29:45,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427090488] [2021-06-05 16:29:45,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:29:45,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:45,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:29:45,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=271, Unknown=3, NotChecked=0, Total=342 [2021-06-05 16:29:45,451 INFO L87 Difference]: Start difference. First operand 1595 states and 5456 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:29:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:45,925 INFO L93 Difference]: Finished difference Result 2234 states and 7411 transitions. [2021-06-05 16:29:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:29:45,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 16:29:45,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:45,929 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 16:29:45,929 INFO L226 Difference]: Without dead ends: 2209 [2021-06-05 16:29:45,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 4838.8ms TimeCoverageRelationStatistics Valid=199, Invalid=854, Unknown=3, NotChecked=0, Total=1056 [2021-06-05 16:29:45,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-06-05 16:29:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1573. [2021-06-05 16:29:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1572 states have (on average 3.422391857506361) internal successors, (5380), 1572 states have internal predecessors, (5380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 5380 transitions. [2021-06-05 16:29:45,949 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 5380 transitions. Word has length 26 [2021-06-05 16:29:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:45,949 INFO L482 AbstractCegarLoop]: Abstraction has 1573 states and 5380 transitions. [2021-06-05 16:29:45,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:29:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 5380 transitions. [2021-06-05 16:29:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:45,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:45,951 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 16:29:46,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4244 [2021-06-05 16:29:46,151 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:46,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:46,151 INFO L82 PathProgramCache]: Analyzing trace with hash -987079049, now seen corresponding path program 42 times [2021-06-05 16:29:46,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:46,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604318129] [2021-06-05 16:29:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:46,255 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 16:29:46,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:46,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604318129] [2021-06-05 16:29:46,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604318129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:46,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076197950] [2021-06-05 16:29:46,255 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 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 16:29:46,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:29:46,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:46,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:29:46,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:46,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:46,444 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 16:29:46,477 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:46,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:46,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:46,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:29:46,567 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:46,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:46,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:46,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:46,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:46,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:46,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:46,734 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:116 [2021-06-05 16:29:46,788 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 16:29:46,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076197950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:46,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:46,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:29:46,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594981614] [2021-06-05 16:29:46,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:29:46,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:46,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:29:46,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:29:46,789 INFO L87 Difference]: Start difference. First operand 1573 states and 5380 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 16:29:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:47,277 INFO L93 Difference]: Finished difference Result 2054 states and 6859 transitions. [2021-06-05 16:29:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:29:47,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 16:29:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:47,280 INFO L225 Difference]: With dead ends: 2054 [2021-06-05 16:29:47,280 INFO L226 Difference]: Without dead ends: 2039 [2021-06-05 16:29:47,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:29:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-06-05 16:29:47,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1618. [2021-06-05 16:29:47,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.4162028447742734) internal successors, (5524), 1617 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:47,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5524 transitions. [2021-06-05 16:29:47,301 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5524 transitions. Word has length 26 [2021-06-05 16:29:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:47,302 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5524 transitions. [2021-06-05 16:29:47,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 16:29:47,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5524 transitions. [2021-06-05 16:29:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:47,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:47,304 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 16:29:47,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4263 [2021-06-05 16:29:47,504 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:47,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1154888141, now seen corresponding path program 43 times [2021-06-05 16:29:47,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:47,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9510930] [2021-06-05 16:29:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:47,649 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 16:29:47,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:47,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9510930] [2021-06-05 16:29:47,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9510930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:47,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652603476] [2021-06-05 16:29:47,649 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 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 16:29:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:47,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:29:47,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:47,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:47,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:29:47,834 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:47,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:47,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:47,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:47,843 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 35 treesize of output 27 [2021-06-05 16:29:47,845 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:47,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:47,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:47,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:29:47,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:47,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:47,872 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:29:47,889 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 16:29:47,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652603476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:47,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:47,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:29:47,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138791148] [2021-06-05 16:29:47,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:47,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:47,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:47,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:47,890 INFO L87 Difference]: Start difference. First operand 1618 states and 5524 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:48,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:48,571 INFO L93 Difference]: Finished difference Result 2315 states and 7658 transitions. [2021-06-05 16:29:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:29:48,572 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:29:48,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:48,575 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 16:29:48,575 INFO L226 Difference]: Without dead ends: 2300 [2021-06-05 16:29:48,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 565.4ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:29:48,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-06-05 16:29:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1619. [2021-06-05 16:29:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.417799752781211) internal successors, (5530), 1618 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5530 transitions. [2021-06-05 16:29:48,599 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5530 transitions. Word has length 26 [2021-06-05 16:29:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:48,599 INFO L482 AbstractCegarLoop]: Abstraction has 1619 states and 5530 transitions. [2021-06-05 16:29:48,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5530 transitions. [2021-06-05 16:29:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:48,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:48,601 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 16:29:48,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4319,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:48,802 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:48,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:48,802 INFO L82 PathProgramCache]: Analyzing trace with hash -856114693, now seen corresponding path program 44 times [2021-06-05 16:29:48,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:48,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56601615] [2021-06-05 16:29:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:48,909 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 16:29:48,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:48,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56601615] [2021-06-05 16:29:48,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56601615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:48,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115654960] [2021-06-05 16:29:48,910 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 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 16:29:48,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:29:48,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:48,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:29:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:49,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:49,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:49,071 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 16:29:49,123 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:49,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:49,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:49,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:49,154 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:29:49,193 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:49,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:49,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:49,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:49,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:49,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:49,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:29:49,372 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:97 [2021-06-05 16:29:49,441 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 16:29:49,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115654960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:49,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:49,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:29:49,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983675898] [2021-06-05 16:29:49,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:49,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:49,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:49,442 INFO L87 Difference]: Start difference. First operand 1619 states and 5530 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:49,760 INFO L93 Difference]: Finished difference Result 2120 states and 7093 transitions. [2021-06-05 16:29:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:29:49,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-05 16:29:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:49,763 INFO L225 Difference]: With dead ends: 2120 [2021-06-05 16:29:49,763 INFO L226 Difference]: Without dead ends: 2105 [2021-06-05 16:29:49,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 394.6ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:29:49,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-06-05 16:29:49,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1622. [2021-06-05 16:29:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.421344848858729) internal successors, (5546), 1621 states have internal predecessors, (5546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5546 transitions. [2021-06-05 16:29:49,785 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5546 transitions. Word has length 26 [2021-06-05 16:29:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:49,785 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5546 transitions. [2021-06-05 16:29:49,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5546 transitions. [2021-06-05 16:29:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:49,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:49,787 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 16:29:49,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4320 [2021-06-05 16:29:49,988 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:49,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1488441339, now seen corresponding path program 45 times [2021-06-05 16:29:49,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:49,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888697287] [2021-06-05 16:29:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:29:50,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:50,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888697287] [2021-06-05 16:29:50,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888697287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:50,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321749295] [2021-06-05 16:29:50,079 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 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 16:29:50,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:29:50,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:50,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:29:50,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:51,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:51,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:51,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 51 [2021-06-05 16:29:51,396 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:51,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:51,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:51,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:51,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:29:51,458 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:51,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:51,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:51,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:51,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:51,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:51,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:29:51,630 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:229 [2021-06-05 16:29:51,714 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 16:29:51,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321749295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:51,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:51,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:29:51,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803568213] [2021-06-05 16:29:51,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:51,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:51,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:51,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2021-06-05 16:29:51,714 INFO L87 Difference]: Start difference. First operand 1622 states and 5546 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:52,029 INFO L93 Difference]: Finished difference Result 2150 states and 7189 transitions. [2021-06-05 16:29:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:29:52,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-05 16:29:52,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:52,032 INFO L225 Difference]: With dead ends: 2150 [2021-06-05 16:29:52,032 INFO L226 Difference]: Without dead ends: 2135 [2021-06-05 16:29:52,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1505.6ms TimeCoverageRelationStatistics Valid=150, Invalid=499, Unknown=1, NotChecked=0, Total=650 [2021-06-05 16:29:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-06-05 16:29:52,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1640. [2021-06-05 16:29:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.416717510677242) internal successors, (5600), 1639 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5600 transitions. [2021-06-05 16:29:52,051 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5600 transitions. Word has length 26 [2021-06-05 16:29:52,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:52,051 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5600 transitions. [2021-06-05 16:29:52,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:52,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5600 transitions. [2021-06-05 16:29:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:52,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:52,053 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 16:29:52,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4377,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:52,254 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:52,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:52,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2007184673, now seen corresponding path program 46 times [2021-06-05 16:29:52,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:52,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967250525] [2021-06-05 16:29:52,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:52,353 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 16:29:52,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:52,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967250525] [2021-06-05 16:29:52,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967250525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:52,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643802680] [2021-06-05 16:29:52,353 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 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 16:29:52,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:29:52,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:52,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:29:52,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:52,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:29:52,563 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:52,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:52,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:52,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:29:52,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:29:52,574 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:52,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:52,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:52,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:29:52,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:52,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:52,596 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:29:52,611 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 16:29:52,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643802680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:52,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:52,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:29:52,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136349501] [2021-06-05 16:29:52,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:52,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:52,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:52,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:52,612 INFO L87 Difference]: Start difference. First operand 1640 states and 5600 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:52,990 INFO L93 Difference]: Finished difference Result 2076 states and 6950 transitions. [2021-06-05 16:29:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:29:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 26 [2021-06-05 16:29:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:52,993 INFO L225 Difference]: With dead ends: 2076 [2021-06-05 16:29:52,993 INFO L226 Difference]: Without dead ends: 2061 [2021-06-05 16:29:52,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 405.1ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:29:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-06-05 16:29:53,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1661. [2021-06-05 16:29:53,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.4126506024096384) internal successors, (5665), 1660 states have internal predecessors, (5665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5665 transitions. [2021-06-05 16:29:53,012 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5665 transitions. Word has length 26 [2021-06-05 16:29:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:53,012 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5665 transitions. [2021-06-05 16:29:53,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 16:29:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5665 transitions. [2021-06-05 16:29:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:53,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:53,014 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 16:29:53,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4433,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:53,217 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:53,217 INFO L82 PathProgramCache]: Analyzing trace with hash 670249843, now seen corresponding path program 47 times [2021-06-05 16:29:53,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:53,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990390228] [2021-06-05 16:29:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:53,324 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 16:29:53,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:53,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990390228] [2021-06-05 16:29:53,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990390228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:53,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959292691] [2021-06-05 16:29:53,324 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 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 16:29:53,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:29:53,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:53,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:29:53,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:53,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:53,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:53,498 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 43 treesize of output 43 [2021-06-05 16:29:53,514 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:53,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:53,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:53,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:53,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:29:53,549 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:53,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:53,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:53,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:53,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:53,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:53,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:53,649 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:19 [2021-06-05 16:29:53,686 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 16:29:53,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959292691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:53,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:53,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:29:53,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575505605] [2021-06-05 16:29:53,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:29:53,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:29:53,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:29:53,687 INFO L87 Difference]: Start difference. First operand 1661 states and 5665 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:29:54,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:54,267 INFO L93 Difference]: Finished difference Result 2366 states and 7851 transitions. [2021-06-05 16:29:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:29:54,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 16:29:54,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:54,271 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 16:29:54,271 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 16:29:54,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 493.6ms TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:29:54,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 16:29:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1658. [2021-06-05 16:29:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4140012070006036) internal successors, (5657), 1657 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5657 transitions. [2021-06-05 16:29:54,292 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5657 transitions. Word has length 26 [2021-06-05 16:29:54,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:54,292 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5657 transitions. [2021-06-05 16:29:54,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 16:29:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5657 transitions. [2021-06-05 16:29:54,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:54,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:54,294 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 16:29:54,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4434,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:29:54,497 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:54,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:54,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1019693061, now seen corresponding path program 48 times [2021-06-05 16:29:54,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:54,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491796154] [2021-06-05 16:29:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:54,597 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 16:29:54,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:54,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491796154] [2021-06-05 16:29:54,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491796154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:54,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071095346] [2021-06-05 16:29:54,598 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 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 16:29:54,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:29:54,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:29:54,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:29:54,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:54,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:54,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:54,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 43 [2021-06-05 16:29:54,755 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:54,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:54,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:54,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:54,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:29:54,791 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:54,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:54,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:54,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:54,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:54,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:54,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:54,877 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 16:29:54,915 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 16:29:54,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071095346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:54,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:54,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:29:54,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485087900] [2021-06-05 16:29:54,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:54,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:54,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:54,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:29:54,915 INFO L87 Difference]: Start difference. First operand 1658 states and 5657 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) 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 16:29:55,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:29:55,374 INFO L93 Difference]: Finished difference Result 2228 states and 7412 transitions. [2021-06-05 16:29:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:29:55,374 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:29:55,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:29:55,377 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 16:29:55,377 INFO L226 Difference]: Without dead ends: 2203 [2021-06-05 16:29:55,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:29:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-05 16:29:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1658. [2021-06-05 16:29:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4164152082076042) internal successors, (5661), 1657 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:29:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5661 transitions. [2021-06-05 16:29:55,397 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5661 transitions. Word has length 26 [2021-06-05 16:29:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:29:55,397 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5661 transitions. [2021-06-05 16:29:55,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:29:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5661 transitions. [2021-06-05 16:29:55,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:29:55,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:29:55,399 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 16:29:55,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4453 [2021-06-05 16:29:55,601 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:29:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:29:55,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1464847671, now seen corresponding path program 49 times [2021-06-05 16:29:55,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:29:55,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107839360] [2021-06-05 16:29:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:29:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:55,707 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 16:29:55,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:29:55,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107839360] [2021-06-05 16:29:55,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107839360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:55,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475958908] [2021-06-05 16:29:55,707 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 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 16:29:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:29:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:29:55,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:29:57,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:57,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:57,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 43 [2021-06-05 16:29:57,389 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:57,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:57,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:29:57,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:57,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:29:57,424 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:29:57,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:57,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:57,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:29:57,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:29:57,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:29:57,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:29:57,519 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-06-05 16:29:57,556 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 16:29:57,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475958908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:29:57,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:29:57,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:29:57,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733333773] [2021-06-05 16:29:57,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:29:57,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:29:57,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:29:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2021-06-05 16:29:57,557 INFO L87 Difference]: Start difference. First operand 1658 states and 5661 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:30:05,242 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 16:30:12,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:12,985 INFO L93 Difference]: Finished difference Result 2151 states and 7200 transitions. [2021-06-05 16:30:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:30:12,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-05 16:30:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:12,989 INFO L225 Difference]: With dead ends: 2151 [2021-06-05 16:30:12,989 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 16:30:12,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 3005.8ms TimeCoverageRelationStatistics Valid=143, Invalid=506, Unknown=1, NotChecked=0, Total=650 [2021-06-05 16:30:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 16:30:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1658. [2021-06-05 16:30:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4164152082076042) internal successors, (5661), 1657 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:13,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5661 transitions. [2021-06-05 16:30:13,008 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5661 transitions. Word has length 26 [2021-06-05 16:30:13,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:13,009 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5661 transitions. [2021-06-05 16:30:13,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:30:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5661 transitions. [2021-06-05 16:30:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:13,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:13,010 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 16:30:13,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4470 [2021-06-05 16:30:13,211 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:13,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1829221231, now seen corresponding path program 56 times [2021-06-05 16:30:13,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:13,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703278314] [2021-06-05 16:30:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:13,415 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 16:30:13,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:13,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703278314] [2021-06-05 16:30:13,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703278314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:13,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913941823] [2021-06-05 16:30:13,415 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 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 16:30:13,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:30:13,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:13,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:30:13,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:13,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:13,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:13,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 37 [2021-06-05 16:30:13,572 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:30:13,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:13,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:13,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:13,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:30:13,584 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 27 [2021-06-05 16:30:13,586 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:30:13,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:13,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:13,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:30:13,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:30:13,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:13,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:30:13,614 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:10 [2021-06-05 16:30:13,644 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 16:30:13,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913941823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:13,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:13,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:30:13,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792897246] [2021-06-05 16:30:13,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:30:13,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:13,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:30:13,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:30:13,645 INFO L87 Difference]: Start difference. First operand 1658 states and 5661 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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 16:30:14,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:30:14,041 INFO L93 Difference]: Finished difference Result 2204 states and 7221 transitions. [2021-06-05 16:30:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:30:14,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-06-05 16:30:14,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:30:14,045 INFO L225 Difference]: With dead ends: 2204 [2021-06-05 16:30:14,045 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 16:30:14,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 527.0ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:30:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 16:30:14,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1676. [2021-06-05 16:30:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.4077611940298507) internal successors, (5708), 1675 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:30:14,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5708 transitions. [2021-06-05 16:30:14,066 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5708 transitions. Word has length 26 [2021-06-05 16:30:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:30:14,066 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5708 transitions. [2021-06-05 16:30:14,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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 16:30:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5708 transitions. [2021-06-05 16:30:14,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:30:14,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:30:14,068 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 16:30:14,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4489,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:30:14,268 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:30:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:30:14,269 INFO L82 PathProgramCache]: Analyzing trace with hash 554911219, now seen corresponding path program 57 times [2021-06-05 16:30:14,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:30:14,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087534757] [2021-06-05 16:30:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:30:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:30:14,436 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 16:30:14,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:30:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087534757] [2021-06-05 16:30:14,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087534757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684384689] [2021-06-05 16:30:14,436 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 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 16:30:14,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:30:14,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:30:14,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:30:14,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:30:17,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:17,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:17,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 69 [2021-06-05 16:30:17,754 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:30:17,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:17,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:17,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:30:17,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:17,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 57 [2021-06-05 16:30:17,874 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:30:17,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:17,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:30:17,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:30:18,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:30:18,744 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 118 [2021-06-05 16:30:18,745 INFO L628 ElimStorePlain]: treesize reduction 632, result has 68.1 percent of original size [2021-06-05 16:30:19,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:30:19,094 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:63 [2021-06-05 16:30:19,147 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 16:30:19,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684384689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:30:19,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:30:19,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:30:19,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113307334] [2021-06-05 16:30:19,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:30:19,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:30:19,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:30:19,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=277, Unknown=2, NotChecked=0, Total=342 [2021-06-05 16:30:19,147 INFO L87 Difference]: Start difference. First operand 1676 states and 5708 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:18,163 INFO L93 Difference]: Finished difference Result 2373 states and 7814 transitions. [2021-06-05 16:31:18,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:31:18,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:31:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:18,167 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 16:31:18,167 INFO L226 Difference]: Without dead ends: 2358 [2021-06-05 16:31:18,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 28854.9ms TimeCoverageRelationStatistics Valid=360, Invalid=1784, Unknown=18, NotChecked=0, Total=2162 [2021-06-05 16:31:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-06-05 16:31:18,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1672. [2021-06-05 16:31:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.40754039497307) internal successors, (5694), 1671 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:18,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5694 transitions. [2021-06-05 16:31:18,188 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5694 transitions. Word has length 26 [2021-06-05 16:31:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:18,188 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5694 transitions. [2021-06-05 16:31:18,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5694 transitions. [2021-06-05 16:31:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:18,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:18,190 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 16:31:18,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4490,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:18,391 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:18,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1130156151, now seen corresponding path program 58 times [2021-06-05 16:31:18,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:18,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007213741] [2021-06-05 16:31:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:18,518 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 16:31:18,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:18,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007213741] [2021-06-05 16:31:18,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007213741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:18,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198924568] [2021-06-05 16:31:18,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:31:18,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:31:18,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:18,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:31:18,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:18,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:18,713 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 16:31:18,713 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 217 [2021-06-05 16:31:18,777 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:18,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:18,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:18,830 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 16:31:18,830 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 195 [2021-06-05 16:31:18,985 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:19,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:19,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:19,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 193 treesize of output 177 [2021-06-05 16:31:19,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:19,753 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 125 [2021-06-05 16:31:19,754 INFO L628 ElimStorePlain]: treesize reduction 178, result has 90.9 percent of original size [2021-06-05 16:31:19,941 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 148 [2021-06-05 16:31:20,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:31:20,163 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:242, output treesize:27 [2021-06-05 16:31:20,196 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 16:31:20,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198924568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:20,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:20,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:31:20,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329872421] [2021-06-05 16:31:20,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:31:20,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:20,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:31:20,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:31:20,197 INFO L87 Difference]: Start difference. First operand 1672 states and 5694 transitions. Second operand has 20 states, 20 states have (on average 2.4) 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 16:31:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:20,882 INFO L93 Difference]: Finished difference Result 2003 states and 6539 transitions. [2021-06-05 16:31:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:31:20,882 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) 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 16:31:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:20,885 INFO L225 Difference]: With dead ends: 2003 [2021-06-05 16:31:20,885 INFO L226 Difference]: Without dead ends: 1981 [2021-06-05 16:31:20,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 667.7ms TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:31:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-06-05 16:31:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1674. [2021-06-05 16:31:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.4076509264793784) internal successors, (5701), 1673 states have internal predecessors, (5701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5701 transitions. [2021-06-05 16:31:20,905 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5701 transitions. Word has length 26 [2021-06-05 16:31:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:20,905 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5701 transitions. [2021-06-05 16:31:20,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) 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 16:31:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5701 transitions. [2021-06-05 16:31:20,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:20,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:20,907 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 16:31:21,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4602,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:21,107 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:21,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2096936581, now seen corresponding path program 59 times [2021-06-05 16:31:21,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:21,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808513487] [2021-06-05 16:31:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:21,260 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 16:31:21,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:21,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808513487] [2021-06-05 16:31:21,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808513487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:21,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869992491] [2021-06-05 16:31:21,260 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 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 16:31:21,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:31:21,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:21,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:31:21,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:22,988 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 16:31:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:22,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:22,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:22,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 16:31:22,999 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:23,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:23,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:23,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:23,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:23,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:23,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 27 [2021-06-05 16:31:23,011 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:23,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:23,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:23,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:31:23,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:23,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:23,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:31:23,044 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:31:23,061 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 16:31:23,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869992491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:23,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:23,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 16:31:23,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218933208] [2021-06-05 16:31:23,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:31:23,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:23,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:31:23,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2021-06-05 16:31:23,061 INFO L87 Difference]: Start difference. First operand 1674 states and 5701 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 16:31:26,252 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 16:31:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:28,546 INFO L93 Difference]: Finished difference Result 2047 states and 6837 transitions. [2021-06-05 16:31:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:31:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 26 [2021-06-05 16:31:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:28,549 INFO L225 Difference]: With dead ends: 2047 [2021-06-05 16:31:28,549 INFO L226 Difference]: Without dead ends: 2016 [2021-06-05 16:31:28,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2785.6ms TimeCoverageRelationStatistics Valid=152, Invalid=549, Unknown=1, NotChecked=0, Total=702 [2021-06-05 16:31:28,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-06-05 16:31:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1680. [2021-06-05 16:31:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.405598570577725) internal successors, (5718), 1679 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5718 transitions. [2021-06-05 16:31:28,567 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5718 transitions. Word has length 26 [2021-06-05 16:31:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:28,567 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5718 transitions. [2021-06-05 16:31:28,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 16:31:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5718 transitions. [2021-06-05 16:31:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:28,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:28,570 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 16:31:28,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4721,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:28,770 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:28,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:28,770 INFO L82 PathProgramCache]: Analyzing trace with hash 540764283, now seen corresponding path program 60 times [2021-06-05 16:31:28,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:28,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657567303] [2021-06-05 16:31:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:28,897 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 16:31:28,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:28,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657567303] [2021-06-05 16:31:28,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657567303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:28,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645054169] [2021-06-05 16:31:28,897 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 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 16:31:28,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:31:28,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:28,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:31:28,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:31,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:31,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:31,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:31,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:31,463 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 47 treesize of output 37 [2021-06-05 16:31:31,465 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:31,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:31,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:31,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:31,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:31,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:31:31,476 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 37 treesize of output 27 [2021-06-05 16:31:31,477 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:31,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:31,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:31,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:31:31,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:31,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:31,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:31:31,500 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:31:31,516 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 16:31:31,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645054169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:31,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:31,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:31:31,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990289560] [2021-06-05 16:31:31,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:31:31,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:31,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:31:31,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=212, Unknown=3, NotChecked=0, Total=272 [2021-06-05 16:31:31,517 INFO L87 Difference]: Start difference. First operand 1680 states and 5718 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 16:31:43,578 WARN L205 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 16:31:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:46,401 INFO L93 Difference]: Finished difference Result 2079 states and 6921 transitions. [2021-06-05 16:31:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:31:46,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 26 [2021-06-05 16:31:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:46,404 INFO L225 Difference]: With dead ends: 2079 [2021-06-05 16:31:46,404 INFO L226 Difference]: Without dead ends: 2064 [2021-06-05 16:31:46,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6914.0ms TimeCoverageRelationStatistics Valid=158, Invalid=592, Unknown=6, NotChecked=0, Total=756 [2021-06-05 16:31:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-06-05 16:31:46,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1680. [2021-06-05 16:31:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.405598570577725) internal successors, (5718), 1679 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5718 transitions. [2021-06-05 16:31:46,424 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5718 transitions. Word has length 26 [2021-06-05 16:31:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:46,424 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5718 transitions. [2021-06-05 16:31:46,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 16:31:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5718 transitions. [2021-06-05 16:31:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:46,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:46,426 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 16:31:46,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4722 [2021-06-05 16:31:46,630 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:46,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1112511237, now seen corresponding path program 50 times [2021-06-05 16:31:46,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:46,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947095455] [2021-06-05 16:31:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:46,813 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 16:31:46,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:46,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947095455] [2021-06-05 16:31:46,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947095455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:46,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899563486] [2021-06-05 16:31:46,813 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 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 16:31:46,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:31:46,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:46,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:31:46,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:46,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:46,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:46,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 43 [2021-06-05 16:31:46,975 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:46,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:46,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:46,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:46,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:31:47,013 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:47,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:47,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:47,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:31:47,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:31:47,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:47,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:31:47,108 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 16:31:47,139 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 16:31:47,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899563486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:47,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:47,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:31:47,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746508920] [2021-06-05 16:31:47,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:31:47,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:47,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:31:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:31:47,140 INFO L87 Difference]: Start difference. First operand 1680 states and 5718 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) 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 16:31:48,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:48,294 INFO L93 Difference]: Finished difference Result 2348 states and 7703 transitions. [2021-06-05 16:31:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:31:48,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:31:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:48,297 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 16:31:48,297 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 16:31:48,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 900.0ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:31:48,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 16:31:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1687. [2021-06-05 16:31:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.4056939501779357) internal successors, (5742), 1686 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5742 transitions. [2021-06-05 16:31:48,318 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5742 transitions. Word has length 26 [2021-06-05 16:31:48,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:48,318 INFO L482 AbstractCegarLoop]: Abstraction has 1687 states and 5742 transitions. [2021-06-05 16:31:48,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:31:48,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5742 transitions. [2021-06-05 16:31:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:48,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:48,320 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 16:31:48,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4723,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:48,521 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash 437870327, now seen corresponding path program 61 times [2021-06-05 16:31:48,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:48,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556907807] [2021-06-05 16:31:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:48,621 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 16:31:48,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:48,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556907807] [2021-06-05 16:31:48,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556907807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:48,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915307446] [2021-06-05 16:31:48,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:48,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:31:48,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:48,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:48,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:48,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 16:31:48,900 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:48,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:48,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:48,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:48,936 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 37 treesize of output 53 [2021-06-05 16:31:49,014 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:49,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:49,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:49,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:31:49,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:31:49,674 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2021-06-05 16:31:49,674 INFO L628 ElimStorePlain]: treesize reduction 120, result has 92.5 percent of original size [2021-06-05 16:31:50,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:31:50,027 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:98 [2021-06-05 16:31:50,060 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 16:31:50,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915307446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:50,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:50,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:31:50,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515231] [2021-06-05 16:31:50,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:31:50,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:50,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:31:50,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:31:50,061 INFO L87 Difference]: Start difference. First operand 1687 states and 5742 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 16:31:51,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:51,614 INFO L93 Difference]: Finished difference Result 2521 states and 7986 transitions. [2021-06-05 16:31:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:31:51,614 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 16:31:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:51,617 INFO L225 Difference]: With dead ends: 2521 [2021-06-05 16:31:51,617 INFO L226 Difference]: Without dead ends: 2484 [2021-06-05 16:31:51,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1226.9ms TimeCoverageRelationStatistics Valid=353, Invalid=1999, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:31:51,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-05 16:31:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1718. [2021-06-05 16:31:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.4111822947000583) internal successors, (5857), 1717 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5857 transitions. [2021-06-05 16:31:51,641 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5857 transitions. Word has length 26 [2021-06-05 16:31:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:51,641 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5857 transitions. [2021-06-05 16:31:51,641 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 16:31:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5857 transitions. [2021-06-05 16:31:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:51,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:51,643 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 16:31:51,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4741,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:51,844 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash 663863851, now seen corresponding path program 62 times [2021-06-05 16:31:51,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:51,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420179918] [2021-06-05 16:31:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:51,980 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 16:31:51,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:51,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420179918] [2021-06-05 16:31:51,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420179918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:51,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602084396] [2021-06-05 16:31:51,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:52,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:31:52,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:52,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:31:52,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:52,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:52,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:52,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:52,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 16:31:52,210 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:52,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:52,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:52,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:31:52,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:52,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 53 [2021-06-05 16:31:52,319 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:52,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:52,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:52,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:31:52,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:31:53,060 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 123 [2021-06-05 16:31:53,061 INFO L628 ElimStorePlain]: treesize reduction 260, result has 86.7 percent of original size [2021-06-05 16:31:53,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,601 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:149 [2021-06-05 16:31:53,652 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 16:31:53,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602084396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:53,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:53,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:31:53,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508832833] [2021-06-05 16:31:53,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:31:53,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:53,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:31:53,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:31:53,653 INFO L87 Difference]: Start difference. First operand 1718 states and 5857 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) 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 16:31:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:54,499 INFO L93 Difference]: Finished difference Result 2981 states and 9498 transitions. [2021-06-05 16:31:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:31:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 16:31:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:54,503 INFO L225 Difference]: With dead ends: 2981 [2021-06-05 16:31:54,503 INFO L226 Difference]: Without dead ends: 2944 [2021-06-05 16:31:54,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 656.8ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:31:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-06-05 16:31:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 1737. [2021-06-05 16:31:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 3.4164746543778803) internal successors, (5931), 1736 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 5931 transitions. [2021-06-05 16:31:54,529 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 5931 transitions. Word has length 26 [2021-06-05 16:31:54,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:54,529 INFO L482 AbstractCegarLoop]: Abstraction has 1737 states and 5931 transitions. [2021-06-05 16:31:54,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 16:31:54,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 5931 transitions. [2021-06-05 16:31:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:31:54,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:54,531 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 16:31:54,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4890 [2021-06-05 16:31:54,733 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash 53047903, now seen corresponding path program 51 times [2021-06-05 16:31:54,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:54,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513025187] [2021-06-05 16:31:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:54,876 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 16:31:54,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:54,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513025187] [2021-06-05 16:31:54,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513025187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:54,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384763162] [2021-06-05 16:31:54,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:31:54,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:31:54,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:54,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:31:54,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:56,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:56,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 59 [2021-06-05 16:31:56,264 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:56,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:56,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:56,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 16:31:56,383 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:31:56,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:56,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:56,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:31:56,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:31:56,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:56,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 9 xjuncts. [2021-06-05 16:31:56,648 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:61, output treesize:349 [2021-06-05 16:31:56,822 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-05 16:31:56,844 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 16:31:56,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384763162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:56,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:56,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 16:31:56,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721437746] [2021-06-05 16:31:56,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:31:56,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:56,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:31:56,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=251, Unknown=1, NotChecked=0, Total=306 [2021-06-05 16:31:56,845 INFO L87 Difference]: Start difference. First operand 1737 states and 5931 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:32:38,854 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 16:32:43,952 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 16:33:06,768 WARN L205 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 16:33:15,479 WARN L205 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 16:33:16,709 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 16:33:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:29,712 INFO L93 Difference]: Finished difference Result 2397 states and 7851 transitions. [2021-06-05 16:33:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:33:29,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:33:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:29,715 INFO L225 Difference]: With dead ends: 2397 [2021-06-05 16:33:29,715 INFO L226 Difference]: Without dead ends: 2382 [2021-06-05 16:33:29,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 37444.9ms TimeCoverageRelationStatistics Valid=297, Invalid=1666, Unknown=17, NotChecked=0, Total=1980 [2021-06-05 16:33:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-05 16:33:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1750. [2021-06-05 16:33:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 3.4128073184676957) internal successors, (5969), 1749 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 5969 transitions. [2021-06-05 16:33:29,737 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 5969 transitions. Word has length 26 [2021-06-05 16:33:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:29,737 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 5969 transitions. [2021-06-05 16:33:29,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:33:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 5969 transitions. [2021-06-05 16:33:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:29,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:29,739 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 16:33:29,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5045 [2021-06-05 16:33:29,953 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:29,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:29,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1564484877, now seen corresponding path program 52 times [2021-06-05 16:33:29,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:29,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424520652] [2021-06-05 16:33:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:30,074 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 16:33:30,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:30,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424520652] [2021-06-05 16:33:30,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424520652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:30,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074983195] [2021-06-05 16:33:30,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:30,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:33:30,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:30,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:30,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:30,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:30,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 43 [2021-06-05 16:33:30,226 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:30,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:30,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:30,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:30,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:33:30,270 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:30,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:30,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:30,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:33:30,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:33:30,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:30,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:33:30,358 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 16:33:30,392 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 16:33:30,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074983195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:30,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:30,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:33:30,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745135909] [2021-06-05 16:33:30,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:30,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:30,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:30,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:33:30,393 INFO L87 Difference]: Start difference. First operand 1750 states and 5969 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:33:31,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:31,271 INFO L93 Difference]: Finished difference Result 2548 states and 8435 transitions. [2021-06-05 16:33:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:33:31,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 16:33:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:31,275 INFO L225 Difference]: With dead ends: 2548 [2021-06-05 16:33:31,275 INFO L226 Difference]: Without dead ends: 2533 [2021-06-05 16:33:31,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 585.7ms TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:33:31,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-06-05 16:33:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1753. [2021-06-05 16:33:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.4121004566210047) internal successors, (5978), 1752 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5978 transitions. [2021-06-05 16:33:31,297 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5978 transitions. Word has length 26 [2021-06-05 16:33:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:31,297 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 5978 transitions. [2021-06-05 16:33:31,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 16:33:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5978 transitions. [2021-06-05 16:33:31,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:31,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:31,299 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 16:33:31,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5156 [2021-06-05 16:33:31,500 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:31,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:31,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1040539515, now seen corresponding path program 53 times [2021-06-05 16:33:31,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:31,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159453717] [2021-06-05 16:33:31,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:31,616 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 16:33:31,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:31,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159453717] [2021-06-05 16:33:31,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159453717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:31,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353921602] [2021-06-05 16:33:31,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:31,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:33:31,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:31,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:31,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 43 [2021-06-05 16:33:31,761 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:31,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:33:31,792 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:31,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:33:31,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:33:31,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:33:31,874 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 16:33:31,913 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 16:33:31,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353921602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:31,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:31,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:33:31,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627160258] [2021-06-05 16:33:31,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:31,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:31,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:31,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:31,914 INFO L87 Difference]: Start difference. First operand 1753 states and 5978 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) 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 16:33:32,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:32,728 INFO L93 Difference]: Finished difference Result 2448 states and 8097 transitions. [2021-06-05 16:33:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:33:32,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:33:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:32,731 INFO L225 Difference]: With dead ends: 2448 [2021-06-05 16:33:32,731 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 16:33:32,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 650.2ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:33:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 16:33:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1739. [2021-06-05 16:33:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1738 states have (on average 3.4177215189873418) internal successors, (5940), 1738 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 5940 transitions. [2021-06-05 16:33:32,752 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 5940 transitions. Word has length 26 [2021-06-05 16:33:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:32,752 INFO L482 AbstractCegarLoop]: Abstraction has 1739 states and 5940 transitions. [2021-06-05 16:33:32,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) 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 16:33:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 5940 transitions. [2021-06-05 16:33:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:32,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:32,754 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 16:33:32,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5175 [2021-06-05 16:33:32,970 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:32,970 INFO L82 PathProgramCache]: Analyzing trace with hash -366405619, now seen corresponding path program 63 times [2021-06-05 16:33:32,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:32,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688924078] [2021-06-05 16:33:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:33,075 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 16:33:33,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:33,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688924078] [2021-06-05 16:33:33,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688924078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:33,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031859542] [2021-06-05 16:33:33,076 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 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 16:33:33,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:33:33,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:33,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:33,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:33,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:33,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:33,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:33,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-05 16:33:33,301 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:33,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:33,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:33,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:33,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:33,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 16:33:33,422 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:33,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:33,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:33,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:33:33,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:33:34,119 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 116 [2021-06-05 16:33:34,119 INFO L628 ElimStorePlain]: treesize reduction 230, result has 87.5 percent of original size [2021-06-05 16:33:34,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:33:34,425 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:88 [2021-06-05 16:33:34,468 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 16:33:34,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031859542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:34,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:34,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:33:34,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564740406] [2021-06-05 16:33:34,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:33:34,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:33:34,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:33:34,469 INFO L87 Difference]: Start difference. First operand 1739 states and 5940 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 16:33:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:35,456 INFO L93 Difference]: Finished difference Result 3292 states and 10488 transitions. [2021-06-05 16:33:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:33:35,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 26 [2021-06-05 16:33:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:35,461 INFO L225 Difference]: With dead ends: 3292 [2021-06-05 16:33:35,461 INFO L226 Difference]: Without dead ends: 3248 [2021-06-05 16:33:35,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 719.3ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:33:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-06-05 16:33:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 1786. [2021-06-05 16:33:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.4252100840336133) internal successors, (6114), 1785 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6114 transitions. [2021-06-05 16:33:35,489 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6114 transitions. Word has length 26 [2021-06-05 16:33:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:35,489 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 6114 transitions. [2021-06-05 16:33:35,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 16:33:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6114 transitions. [2021-06-05 16:33:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:35,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:35,491 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 16:33:35,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5192,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:35,691 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:35,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:35,692 INFO L82 PathProgramCache]: Analyzing trace with hash -356659183, now seen corresponding path program 64 times [2021-06-05 16:33:35,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:35,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547755951] [2021-06-05 16:33:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:35,817 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 16:33:35,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:35,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547755951] [2021-06-05 16:33:35,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547755951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:35,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196872114] [2021-06-05 16:33:35,818 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 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 16:33:35,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:33:35,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:35,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:35,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:35,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:35,999 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 16:33:35,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 175 [2021-06-05 16:33:36,002 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:36,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,022 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 16:33:36,023 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 98 [2021-06-05 16:33:36,025 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:36,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:36,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:36,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:33:36,040 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:36,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,049 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:212, output treesize:3 [2021-06-05 16:33:36,062 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 16:33:36,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196872114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:36,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:36,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:33:36,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768872533] [2021-06-05 16:33:36,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:36,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:36,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:36,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:33:36,063 INFO L87 Difference]: Start difference. First operand 1786 states and 6114 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 16:33:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:36,841 INFO L93 Difference]: Finished difference Result 2484 states and 8179 transitions. [2021-06-05 16:33:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:33:36,841 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 16:33:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:36,844 INFO L225 Difference]: With dead ends: 2484 [2021-06-05 16:33:36,845 INFO L226 Difference]: Without dead ends: 2462 [2021-06-05 16:33:36,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 707.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:33:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-06-05 16:33:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1807. [2021-06-05 16:33:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 3.4186046511627906) internal successors, (6174), 1806 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 6174 transitions. [2021-06-05 16:33:36,870 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 6174 transitions. Word has length 26 [2021-06-05 16:33:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:36,870 INFO L482 AbstractCegarLoop]: Abstraction has 1807 states and 6174 transitions. [2021-06-05 16:33:36,870 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 16:33:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 6174 transitions. [2021-06-05 16:33:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:36,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:36,872 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 16:33:37,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5363 [2021-06-05 16:33:37,081 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:37,081 INFO L82 PathProgramCache]: Analyzing trace with hash 568834683, now seen corresponding path program 65 times [2021-06-05 16:33:37,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:37,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131555674] [2021-06-05 16:33:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:37,220 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 16:33:37,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:37,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131555674] [2021-06-05 16:33:37,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131555674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:37,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791320178] [2021-06-05 16:33:37,220 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 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 16:33:37,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:33:37,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:37,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:37,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:39,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:39,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:39,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:39,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:39,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 37 [2021-06-05 16:33:39,262 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:39,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:39,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:39,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:39,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:39,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:39,272 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 37 treesize of output 27 [2021-06-05 16:33:39,274 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:39,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:39,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:39,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:33:39,287 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:39,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:39,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:33:39,296 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:33:39,313 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 16:33:39,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791320178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:39,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:39,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:33:39,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020256560] [2021-06-05 16:33:39,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:33:39,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:39,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:33:39,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=209, Unknown=2, NotChecked=0, Total=272 [2021-06-05 16:33:39,314 INFO L87 Difference]: Start difference. First operand 1807 states and 6174 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) 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 16:33:43,040 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 16:33:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:44,393 INFO L93 Difference]: Finished difference Result 2669 states and 8779 transitions. [2021-06-05 16:33:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:33:44,393 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) 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 26 [2021-06-05 16:33:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:44,397 INFO L225 Difference]: With dead ends: 2669 [2021-06-05 16:33:44,397 INFO L226 Difference]: Without dead ends: 2650 [2021-06-05 16:33:44,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 3656.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1157, Unknown=2, NotChecked=0, Total=1482 [2021-06-05 16:33:44,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-06-05 16:33:44,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 1827. [2021-06-05 16:33:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.423329682365827) internal successors, (6251), 1826 states have internal predecessors, (6251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6251 transitions. [2021-06-05 16:33:44,419 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6251 transitions. Word has length 26 [2021-06-05 16:33:44,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:44,419 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6251 transitions. [2021-06-05 16:33:44,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) 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 16:33:44,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6251 transitions. [2021-06-05 16:33:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:44,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:44,421 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 16:33:44,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5364 [2021-06-05 16:33:44,622 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:44,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:44,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1843182409, now seen corresponding path program 54 times [2021-06-05 16:33:44,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:44,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939227588] [2021-06-05 16:33:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:44,732 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 16:33:44,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:44,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939227588] [2021-06-05 16:33:44,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939227588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:44,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913584379] [2021-06-05 16:33:44,733 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 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 16:33:44,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:33:44,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:44,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:33:44,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:44,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 16:33:44,953 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:44,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:44,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:33:45,020 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:45,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:45,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:45,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:33:45,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:33:45,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:45,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:33:45,194 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:110 [2021-06-05 16:33:45,310 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 16:33:45,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913584379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:45,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:45,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:33:45,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355548434] [2021-06-05 16:33:45,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:45,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:45,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:45,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:45,311 INFO L87 Difference]: Start difference. First operand 1827 states and 6251 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 16:33:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:46,850 INFO L93 Difference]: Finished difference Result 2809 states and 9183 transitions. [2021-06-05 16:33:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:33:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 16:33:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:46,854 INFO L225 Difference]: With dead ends: 2809 [2021-06-05 16:33:46,854 INFO L226 Difference]: Without dead ends: 2794 [2021-06-05 16:33:46,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1031.6ms TimeCoverageRelationStatistics Valid=280, Invalid=1442, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:33:46,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-06-05 16:33:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1827. [2021-06-05 16:33:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.41894852135816) internal successors, (6243), 1826 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 16:33:46,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6243 transitions. [2021-06-05 16:33:46,879 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6243 transitions. Word has length 26 [2021-06-05 16:33:46,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:46,879 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6243 transitions. [2021-06-05 16:33:46,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 16:33:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6243 transitions. [2021-06-05 16:33:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:46,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:46,881 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 16:33:47,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5365 [2021-06-05 16:33:47,082 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash 761841983, now seen corresponding path program 55 times [2021-06-05 16:33:47,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:47,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016254573] [2021-06-05 16:33:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:47,207 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 16:33:47,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:47,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016254573] [2021-06-05 16:33:47,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016254573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:47,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709154197] [2021-06-05 16:33:47,207 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 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 16:33:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:47,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:47,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:48,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:48,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:48,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 43 [2021-06-05 16:33:48,855 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:48,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:48,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:48,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:48,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:33:48,889 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:48,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:48,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:48,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:33:48,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:33:48,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:48,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:33:48,979 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 16:33:49,015 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 16:33:49,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709154197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:49,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:49,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:33:49,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830036862] [2021-06-05 16:33:49,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:49,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:49,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:49,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=235, Unknown=1, NotChecked=0, Total=306 [2021-06-05 16:33:49,016 INFO L87 Difference]: Start difference. First operand 1827 states and 6243 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:33:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:49,501 INFO L93 Difference]: Finished difference Result 2450 states and 8163 transitions. [2021-06-05 16:33:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:33:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-05 16:33:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:49,505 INFO L225 Difference]: With dead ends: 2450 [2021-06-05 16:33:49,505 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 16:33:49,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1900.2ms TimeCoverageRelationStatistics Valid=172, Invalid=639, Unknown=1, NotChecked=0, Total=812 [2021-06-05 16:33:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 16:33:49,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1821. [2021-06-05 16:33:49,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 3.4164835164835163) internal successors, (6218), 1820 states have internal predecessors, (6218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:49,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 6218 transitions. [2021-06-05 16:33:49,539 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 6218 transitions. Word has length 26 [2021-06-05 16:33:49,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:49,539 INFO L482 AbstractCegarLoop]: Abstraction has 1821 states and 6218 transitions. [2021-06-05 16:33:49,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:33:49,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 6218 transitions. [2021-06-05 16:33:49,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:49,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:49,541 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 16:33:49,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5425,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:49,742 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:49,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1900688067, now seen corresponding path program 56 times [2021-06-05 16:33:49,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:49,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158664234] [2021-06-05 16:33:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:49,863 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 16:33:49,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:49,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158664234] [2021-06-05 16:33:49,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158664234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:49,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619748181] [2021-06-05 16:33:49,863 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 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 16:33:49,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:33:49,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:49,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:49,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:50,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,007 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 43 treesize of output 43 [2021-06-05 16:33:50,023 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:50,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:33:50,054 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:50,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:33:50,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:33:50,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,138 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 16:33:50,171 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 16:33:50,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619748181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:50,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:50,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:33:50,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020257977] [2021-06-05 16:33:50,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:50,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:50,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:50,172 INFO L87 Difference]: Start difference. First operand 1821 states and 6218 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:33:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:50,975 INFO L93 Difference]: Finished difference Result 2386 states and 7961 transitions. [2021-06-05 16:33:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:33:50,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:33:50,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:50,978 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 16:33:50,978 INFO L226 Difference]: Without dead ends: 2371 [2021-06-05 16:33:50,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 597.4ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:33:50,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-06-05 16:33:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1810. [2021-06-05 16:33:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 3.4201216141514648) internal successors, (6187), 1809 states have internal predecessors, (6187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 6187 transitions. [2021-06-05 16:33:51,001 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 6187 transitions. Word has length 26 [2021-06-05 16:33:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:51,001 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 6187 transitions. [2021-06-05 16:33:51,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 16:33:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 6187 transitions. [2021-06-05 16:33:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:51,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:51,003 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 16:33:51,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5444,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:51,203 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:51,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:51,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1048584581, now seen corresponding path program 57 times [2021-06-05 16:33:51,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:51,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854615354] [2021-06-05 16:33:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:51,322 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 16:33:51,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:51,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854615354] [2021-06-05 16:33:51,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854615354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:51,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679866629] [2021-06-05 16:33:51,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:33:51,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:33:51,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:51,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:51,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:53,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:53,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:53,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 51 [2021-06-05 16:33:53,062 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:53,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:53,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:53,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:53,091 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:33:53,131 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:33:53,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:53,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:53,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:33:53,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:33:53,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:53,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:33:53,301 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:219 [2021-06-05 16:33:53,416 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 16:33:53,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679866629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:53,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:53,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:33:53,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306842073] [2021-06-05 16:33:53,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:53,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:53,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:53,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=236, Unknown=1, NotChecked=0, Total=306 [2021-06-05 16:33:53,417 INFO L87 Difference]: Start difference. First operand 1810 states and 6187 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:34:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:14,418 INFO L93 Difference]: Finished difference Result 2381 states and 7969 transitions. [2021-06-05 16:34:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:34:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-06-05 16:34:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:14,422 INFO L225 Difference]: With dead ends: 2381 [2021-06-05 16:34:14,422 INFO L226 Difference]: Without dead ends: 2366 [2021-06-05 16:34:14,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2034.1ms TimeCoverageRelationStatistics Valid=166, Invalid=589, Unknown=1, NotChecked=0, Total=756 [2021-06-05 16:34:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-06-05 16:34:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 1804. [2021-06-05 16:34:14,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.4215196894065447) internal successors, (6169), 1803 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6169 transitions. [2021-06-05 16:34:14,443 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6169 transitions. Word has length 26 [2021-06-05 16:34:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:14,443 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 6169 transitions. [2021-06-05 16:34:14,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 16:34:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6169 transitions. [2021-06-05 16:34:14,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:14,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:14,446 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 16:34:14,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5462,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:14,646 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:14,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:14,646 INFO L82 PathProgramCache]: Analyzing trace with hash 203762543, now seen corresponding path program 66 times [2021-06-05 16:34:14,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:14,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330523361] [2021-06-05 16:34:14,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:14,791 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 16:34:14,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:14,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330523361] [2021-06-05 16:34:14,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330523361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:14,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685764776] [2021-06-05 16:34:14,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:14,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:34:14,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:14,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:34:14,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:14,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:14,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:14,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:14,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:14,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 16:34:14,949 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:34:14,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:14,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:14,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:14,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:14,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:14,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 27 [2021-06-05 16:34:14,960 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:34:14,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:14,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:14,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:34:14,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:14,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:14,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:34:14,982 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:34:15,000 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 16:34:15,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685764776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:15,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:15,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:34:15,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956069432] [2021-06-05 16:34:15,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:15,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:15,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:15,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:15,001 INFO L87 Difference]: Start difference. First operand 1804 states and 6169 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 16:34:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:16,318 INFO L93 Difference]: Finished difference Result 2506 states and 8313 transitions. [2021-06-05 16:34:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:34:16,318 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-06-05 16:34:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:16,322 INFO L225 Difference]: With dead ends: 2506 [2021-06-05 16:34:16,322 INFO L226 Difference]: Without dead ends: 2484 [2021-06-05 16:34:16,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1094.1ms TimeCoverageRelationStatistics Valid=432, Invalid=1730, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:34:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-05 16:34:16,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1798. [2021-06-05 16:34:16,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 3.4201446855870894) internal successors, (6146), 1797 states have internal predecessors, (6146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 6146 transitions. [2021-06-05 16:34:16,346 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 6146 transitions. Word has length 26 [2021-06-05 16:34:16,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:16,346 INFO L482 AbstractCegarLoop]: Abstraction has 1798 states and 6146 transitions. [2021-06-05 16:34:16,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 16:34:16,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 6146 transitions. [2021-06-05 16:34:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:16,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:16,348 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 16:34:16,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5517,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:16,548 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:16,549 INFO L82 PathProgramCache]: Analyzing trace with hash -82162369, now seen corresponding path program 67 times [2021-06-05 16:34:16,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:16,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489721150] [2021-06-05 16:34:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:16,697 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 16:34:16,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:16,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489721150] [2021-06-05 16:34:16,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489721150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:16,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198213339] [2021-06-05 16:34:16,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:16,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:34:16,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:17,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:17,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:17,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:17,671 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 47 treesize of output 37 [2021-06-05 16:34:17,672 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:34:17,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:17,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:17,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:17,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:17,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 27 [2021-06-05 16:34:17,685 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:34:17,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:17,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:17,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 16:34:17,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:17,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:17,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:34:17,707 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:34:17,724 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 16:34:17,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198213339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:17,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:17,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:34:17,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044158534] [2021-06-05 16:34:17,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:34:17,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:17,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:34:17,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2021-06-05 16:34:17,725 INFO L87 Difference]: Start difference. First operand 1798 states and 6146 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 16:34:19,975 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 16:34:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:20,019 INFO L93 Difference]: Finished difference Result 2433 states and 8050 transitions. [2021-06-05 16:34:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:34:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-05 16:34:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:20,023 INFO L225 Difference]: With dead ends: 2433 [2021-06-05 16:34:20,023 INFO L226 Difference]: Without dead ends: 2414 [2021-06-05 16:34:20,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 3017.7ms TimeCoverageRelationStatistics Valid=302, Invalid=1179, Unknown=1, NotChecked=0, Total=1482 [2021-06-05 16:34:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-05 16:34:20,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1788. [2021-06-05 16:34:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.420817011751539) internal successors, (6113), 1787 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6113 transitions. [2021-06-05 16:34:20,044 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6113 transitions. Word has length 26 [2021-06-05 16:34:20,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:20,044 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6113 transitions. [2021-06-05 16:34:20,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 16:34:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6113 transitions. [2021-06-05 16:34:20,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:20,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:20,046 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 16:34:20,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5518,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:20,253 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:20,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1381576581, now seen corresponding path program 68 times [2021-06-05 16:34:20,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:20,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345458844] [2021-06-05 16:34:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:20,407 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 16:34:20,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:20,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345458844] [2021-06-05 16:34:20,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345458844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:20,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123449415] [2021-06-05 16:34:20,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:20,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:34:20,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:34:20,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:24,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:24,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:24,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:24,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-05 16:34:24,420 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:34:24,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:24,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:24,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:24,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:24,459 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 37 treesize of output 55 [2021-06-05 16:34:24,533 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:34:24,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:24,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:24,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:34:24,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:34:25,512 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 111 [2021-06-05 16:34:25,513 INFO L628 ElimStorePlain]: treesize reduction 862, result has 54.9 percent of original size [2021-06-05 16:34:25,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:34:25,772 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:78 [2021-06-05 16:34:25,809 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 16:34:25,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123449415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:25,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:25,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 16:34:25,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547692312] [2021-06-05 16:34:25,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:34:25,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:25,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:34:25,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=275, Unknown=2, NotChecked=0, Total=342 [2021-06-05 16:34:25,810 INFO L87 Difference]: Start difference. First operand 1788 states and 6113 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 16:34:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:26,658 INFO L93 Difference]: Finished difference Result 2410 states and 8027 transitions. [2021-06-05 16:34:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:34:26,659 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 26 [2021-06-05 16:34:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:26,662 INFO L225 Difference]: With dead ends: 2410 [2021-06-05 16:34:26,662 INFO L226 Difference]: Without dead ends: 2395 [2021-06-05 16:34:26,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 4460.8ms TimeCoverageRelationStatistics Valid=238, Invalid=1092, Unknown=2, NotChecked=0, Total=1332 [2021-06-05 16:34:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-06-05 16:34:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1793. [2021-06-05 16:34:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1792 states have (on average 3.42578125) internal successors, (6139), 1792 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 6139 transitions. [2021-06-05 16:34:26,684 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 6139 transitions. Word has length 26 [2021-06-05 16:34:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:26,684 INFO L482 AbstractCegarLoop]: Abstraction has 1793 states and 6139 transitions. [2021-06-05 16:34:26,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 16:34:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 6139 transitions. [2021-06-05 16:34:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:26,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:26,686 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 16:34:26,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5519 [2021-06-05 16:34:26,889 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1841060543, now seen corresponding path program 69 times [2021-06-05 16:34:26,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:26,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130501365] [2021-06-05 16:34:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:27,028 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 16:34:27,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130501365] [2021-06-05 16:34:27,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130501365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:27,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352415176] [2021-06-05 16:34:27,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:27,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:34:27,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:27,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:34:27,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:29,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:29,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:29,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:29,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-05 16:34:29,239 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:34:29,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:29,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:29,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:29,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:29,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 16:34:29,352 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:34:29,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:29,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:29,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 16:34:29,704 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:34:30,218 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2021-06-05 16:34:30,219 INFO L628 ElimStorePlain]: treesize reduction 708, result has 70.2 percent of original size [2021-06-05 16:34:30,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:34:30,593 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:43 [2021-06-05 16:34:30,639 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 16:34:30,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352415176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:30,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:30,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:34:30,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895971449] [2021-06-05 16:34:30,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:34:30,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:30,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:34:30,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=187, Unknown=1, NotChecked=0, Total=240 [2021-06-05 16:34:30,640 INFO L87 Difference]: Start difference. First operand 1793 states and 6139 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 16:34:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:46,159 INFO L93 Difference]: Finished difference Result 2526 states and 8347 transitions. [2021-06-05 16:34:46,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:34:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:46,163 INFO L225 Difference]: With dead ends: 2526 [2021-06-05 16:34:46,163 INFO L226 Difference]: Without dead ends: 2496 [2021-06-05 16:34:46,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2534.0ms TimeCoverageRelationStatistics Valid=206, Invalid=849, Unknown=1, NotChecked=0, Total=1056 [2021-06-05 16:34:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-05 16:34:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1788. [2021-06-05 16:34:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.4191382204812535) internal successors, (6110), 1787 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 16:34:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6110 transitions. [2021-06-05 16:34:46,184 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6110 transitions. Word has length 26 [2021-06-05 16:34:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:46,185 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6110 transitions. [2021-06-05 16:34:46,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 16:34:46,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6110 transitions. [2021-06-05 16:34:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:46,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:46,187 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 16:34:46,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5662 [2021-06-05 16:34:46,396 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:46,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1705681877, now seen corresponding path program 58 times [2021-06-05 16:34:46,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:46,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598574495] [2021-06-05 16:34:46,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:46,433 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 16:34:46,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:46,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598574495] [2021-06-05 16:34:46,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598574495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:46,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012425190] [2021-06-05 16:34:46,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:46,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:34:46,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:34:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:46,553 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 16:34:46,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012425190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:46,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:46,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:34:46,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943036620] [2021-06-05 16:34:46,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:34:46,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:46,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:34:46,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:34:46,554 INFO L87 Difference]: Start difference. First operand 1788 states and 6110 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 16:34:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:47,559 INFO L93 Difference]: Finished difference Result 4735 states and 14630 transitions. [2021-06-05 16:34:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:34:47,559 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 16:34:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:47,565 INFO L225 Difference]: With dead ends: 4735 [2021-06-05 16:34:47,566 INFO L226 Difference]: Without dead ends: 4735 [2021-06-05 16:34:47,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 521.0ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:34:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-06-05 16:34:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 1981. [2021-06-05 16:34:47,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.4752525252525253) internal successors, (6881), 1980 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6881 transitions. [2021-06-05 16:34:47,604 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6881 transitions. Word has length 28 [2021-06-05 16:34:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:47,604 INFO L482 AbstractCegarLoop]: Abstraction has 1981 states and 6881 transitions. [2021-06-05 16:34:47,605 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 16:34:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6881 transitions. [2021-06-05 16:34:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:47,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:47,607 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 16:34:47,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5784 [2021-06-05 16:34:47,823 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash 729363033, now seen corresponding path program 59 times [2021-06-05 16:34:47,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:47,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448681359] [2021-06-05 16:34:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:47,869 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 16:34:47,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:47,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448681359] [2021-06-05 16:34:47,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448681359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:47,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691632737] [2021-06-05 16:34:47,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:47,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:34:47,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:47,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:34:47,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:48,015 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 16:34:48,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691632737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:48,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:48,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:34:48,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349154406] [2021-06-05 16:34:48,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:34:48,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:48,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:34:48,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:34:48,017 INFO L87 Difference]: Start difference. First operand 1981 states and 6881 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 16:34:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:49,199 INFO L93 Difference]: Finished difference Result 6281 states and 19109 transitions. [2021-06-05 16:34:49,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:34:49,200 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 16:34:49,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:49,208 INFO L225 Difference]: With dead ends: 6281 [2021-06-05 16:34:49,208 INFO L226 Difference]: Without dead ends: 6281 [2021-06-05 16:34:49,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 744.2ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:34:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6281 states. [2021-06-05 16:34:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6281 to 1992. [2021-06-05 16:34:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 3.4831742842792566) internal successors, (6935), 1991 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 6935 transitions. [2021-06-05 16:34:49,255 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 6935 transitions. Word has length 28 [2021-06-05 16:34:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:49,255 INFO L482 AbstractCegarLoop]: Abstraction has 1992 states and 6935 transitions. [2021-06-05 16:34:49,255 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 16:34:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 6935 transitions. [2021-06-05 16:34:49,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:49,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:49,258 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 16:34:49,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5785,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:49,465 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1296315113, now seen corresponding path program 60 times [2021-06-05 16:34:49,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:49,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66612625] [2021-06-05 16:34:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:49,504 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 16:34:49,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:49,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66612625] [2021-06-05 16:34:49,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66612625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:49,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123388907] [2021-06-05 16:34:49,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:34:49,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:34:49,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:49,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:34:49,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:49,641 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 16:34:49,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123388907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:49,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:49,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:34:49,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047209906] [2021-06-05 16:34:49,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:34:49,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:49,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:34:49,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:34:49,642 INFO L87 Difference]: Start difference. First operand 1992 states and 6935 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 16:34:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:50,803 INFO L93 Difference]: Finished difference Result 5674 states and 17641 transitions. [2021-06-05 16:34:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:34:50,804 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 16:34:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:50,811 INFO L225 Difference]: With dead ends: 5674 [2021-06-05 16:34:50,811 INFO L226 Difference]: Without dead ends: 5674 [2021-06-05 16:34:50,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 699.1ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:34:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2021-06-05 16:34:50,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 1940. [2021-06-05 16:34:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1939 states have (on average 3.4569365652398143) internal successors, (6703), 1939 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 6703 transitions. [2021-06-05 16:34:50,851 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 6703 transitions. Word has length 28 [2021-06-05 16:34:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:50,851 INFO L482 AbstractCegarLoop]: Abstraction has 1940 states and 6703 transitions. [2021-06-05 16:34:50,851 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 16:34:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 6703 transitions. [2021-06-05 16:34:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:50,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:50,853 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 16:34:51,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5786,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:51,069 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1816623861, now seen corresponding path program 61 times [2021-06-05 16:34:51,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:51,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515851760] [2021-06-05 16:34:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:51,108 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 16:34:51,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:51,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515851760] [2021-06-05 16:34:51,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515851760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:51,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267042278] [2021-06-05 16:34:51,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:51,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:34:51,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:51,220 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 16:34:51,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267042278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:51,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:51,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:34:51,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725610489] [2021-06-05 16:34:51,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:34:51,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:51,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:34:51,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:34:51,221 INFO L87 Difference]: Start difference. First operand 1940 states and 6703 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 16:34:52,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:52,253 INFO L93 Difference]: Finished difference Result 4821 states and 14797 transitions. [2021-06-05 16:34:52,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:34:52,254 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 16:34:52,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:52,260 INFO L225 Difference]: With dead ends: 4821 [2021-06-05 16:34:52,260 INFO L226 Difference]: Without dead ends: 4821 [2021-06-05 16:34:52,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 619.5ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:34:52,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4821 states. [2021-06-05 16:34:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4821 to 1950. [2021-06-05 16:34:52,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.452539763981529) internal successors, (6729), 1949 states have internal predecessors, (6729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 6729 transitions. [2021-06-05 16:34:52,298 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 6729 transitions. Word has length 28 [2021-06-05 16:34:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:52,298 INFO L482 AbstractCegarLoop]: Abstraction has 1950 states and 6729 transitions. [2021-06-05 16:34:52,298 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 16:34:52,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 6729 transitions. [2021-06-05 16:34:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:52,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:52,300 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 16:34:52,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5787,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:52,500 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1268713169, now seen corresponding path program 70 times [2021-06-05 16:34:52,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:52,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177483573] [2021-06-05 16:34:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:52,540 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 16:34:52,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:52,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177483573] [2021-06-05 16:34:52,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177483573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:52,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241750753] [2021-06-05 16:34:52,540 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 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 16:34:52,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:34:52,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:52,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:34:52,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:52,666 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 16:34:52,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241750753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:52,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:52,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:34:52,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224354953] [2021-06-05 16:34:52,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:34:52,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:52,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:34:52,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:34:52,667 INFO L87 Difference]: Start difference. First operand 1950 states and 6729 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 16:34:53,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:53,237 INFO L93 Difference]: Finished difference Result 4242 states and 13200 transitions. [2021-06-05 16:34:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:34:53,237 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 16:34:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:53,242 INFO L225 Difference]: With dead ends: 4242 [2021-06-05 16:34:53,242 INFO L226 Difference]: Without dead ends: 4242 [2021-06-05 16:34:53,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:34:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4242 states. [2021-06-05 16:34:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4242 to 2006. [2021-06-05 16:34:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 3.437406483790524) internal successors, (6892), 2005 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 6892 transitions. [2021-06-05 16:34:53,275 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 6892 transitions. Word has length 28 [2021-06-05 16:34:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:53,275 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 6892 transitions. [2021-06-05 16:34:53,275 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 16:34:53,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 6892 transitions. [2021-06-05 16:34:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:53,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:53,278 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 16:34:53,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5788,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:53,478 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:53,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:53,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1127344537, now seen corresponding path program 62 times [2021-06-05 16:34:53,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:53,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314791096] [2021-06-05 16:34:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:53,504 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 16:34:53,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:53,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314791096] [2021-06-05 16:34:53,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314791096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:53,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939505100] [2021-06-05 16:34:53,505 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 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 16:34:53,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:34:53,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:34:53,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:53,581 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 16:34:53,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939505100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:53,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:53,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:34:53,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100634911] [2021-06-05 16:34:53,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:34:53,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:53,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:34:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:34:53,582 INFO L87 Difference]: Start difference. First operand 2006 states and 6892 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 16:34:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:53,741 INFO L93 Difference]: Finished difference Result 3508 states and 11418 transitions. [2021-06-05 16:34:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:34:53,741 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 16:34:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:53,745 INFO L225 Difference]: With dead ends: 3508 [2021-06-05 16:34:53,746 INFO L226 Difference]: Without dead ends: 3490 [2021-06-05 16:34:53,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:53,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-05 16:34:53,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2393. [2021-06-05 16:34:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 3.5100334448160537) internal successors, (8396), 2392 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 8396 transitions. [2021-06-05 16:34:53,777 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 8396 transitions. Word has length 28 [2021-06-05 16:34:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:53,777 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 8396 transitions. [2021-06-05 16:34:53,777 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 16:34:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 8396 transitions. [2021-06-05 16:34:53,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:53,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:53,780 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 16:34:53,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5789 [2021-06-05 16:34:53,981 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:53,981 INFO L82 PathProgramCache]: Analyzing trace with hash 690375829, now seen corresponding path program 63 times [2021-06-05 16:34:53,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:53,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60858266] [2021-06-05 16:34:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:54,013 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 16:34:54,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:54,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60858266] [2021-06-05 16:34:54,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60858266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:54,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103830475] [2021-06-05 16:34:54,013 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 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 16:34:54,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:34:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:54,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:34:54,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:54,109 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 16:34:54,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103830475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:54,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:54,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:34:54,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811573192] [2021-06-05 16:34:54,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:34:54,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:54,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:34:54,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:34:54,110 INFO L87 Difference]: Start difference. First operand 2393 states and 8396 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 16:34:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:54,684 INFO L93 Difference]: Finished difference Result 4165 states and 13279 transitions. [2021-06-05 16:34:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:34:54,685 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 16:34:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:54,690 INFO L225 Difference]: With dead ends: 4165 [2021-06-05 16:34:54,690 INFO L226 Difference]: Without dead ends: 4118 [2021-06-05 16:34:54,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:34:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2021-06-05 16:34:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 2561. [2021-06-05 16:34:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 3.53046875) internal successors, (9038), 2560 states have internal predecessors, (9038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 9038 transitions. [2021-06-05 16:34:54,733 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 9038 transitions. Word has length 28 [2021-06-05 16:34:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:54,733 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 9038 transitions. [2021-06-05 16:34:54,734 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 16:34:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 9038 transitions. [2021-06-05 16:34:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:54,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:54,737 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 16:34:54,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5790 [2021-06-05 16:34:54,937 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:54,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:54,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1670242449, now seen corresponding path program 71 times [2021-06-05 16:34:54,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:54,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114352354] [2021-06-05 16:34:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:54,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:54,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114352354] [2021-06-05 16:34:54,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114352354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:54,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196348609] [2021-06-05 16:34:54,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:54,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:34:54,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:54,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:34:54,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:55,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196348609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:55,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:55,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 16:34:55,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678883228] [2021-06-05 16:34:55,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:34:55,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:55,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:34:55,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:34:55,089 INFO L87 Difference]: Start difference. First operand 2561 states and 9038 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 16:34:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:55,476 INFO L93 Difference]: Finished difference Result 5014 states and 16655 transitions. [2021-06-05 16:34:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:34:55,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 16:34:55,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:55,483 INFO L225 Difference]: With dead ends: 5014 [2021-06-05 16:34:55,483 INFO L226 Difference]: Without dead ends: 4927 [2021-06-05 16:34:55,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:34:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4927 states. [2021-06-05 16:34:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4927 to 3219. [2021-06-05 16:34:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 3218 states have (on average 3.550652579241765) internal successors, (11426), 3218 states have internal predecessors, (11426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 11426 transitions. [2021-06-05 16:34:55,535 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 11426 transitions. Word has length 28 [2021-06-05 16:34:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:55,535 INFO L482 AbstractCegarLoop]: Abstraction has 3219 states and 11426 transitions. [2021-06-05 16:34:55,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 16:34:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 11426 transitions. [2021-06-05 16:34:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:55,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:55,540 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 16:34:55,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5791,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:55,740 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:55,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:55,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2068501991, now seen corresponding path program 64 times [2021-06-05 16:34:55,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:55,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646862367] [2021-06-05 16:34:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:55,772 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 16:34:55,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:55,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646862367] [2021-06-05 16:34:55,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646862367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:55,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899317813] [2021-06-05 16:34:55,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:34:55,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:34:55,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:55,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:34:55,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:55,878 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 16:34:55,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899317813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:55,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:55,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:34:55,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445780909] [2021-06-05 16:34:55,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:34:55,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:55,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:34:55,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:34:55,879 INFO L87 Difference]: Start difference. First operand 3219 states and 11426 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 16:34:56,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:56,530 INFO L93 Difference]: Finished difference Result 5456 states and 17327 transitions. [2021-06-05 16:34:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:34:56,531 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 16:34:56,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:56,537 INFO L225 Difference]: With dead ends: 5456 [2021-06-05 16:34:56,538 INFO L226 Difference]: Without dead ends: 5430 [2021-06-05 16:34:56,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:34:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2021-06-05 16:34:56,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 3237. [2021-06-05 16:34:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 3.5559332509270702) internal successors, (11507), 3236 states have internal predecessors, (11507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 11507 transitions. [2021-06-05 16:34:56,593 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 11507 transitions. Word has length 28 [2021-06-05 16:34:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:56,593 INFO L482 AbstractCegarLoop]: Abstraction has 3237 states and 11507 transitions. [2021-06-05 16:34:56,593 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 16:34:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 11507 transitions. [2021-06-05 16:34:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:56,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:56,597 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 16:34:56,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5792 [2021-06-05 16:34:56,797 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:56,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:56,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1396089209, now seen corresponding path program 65 times [2021-06-05 16:34:56,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:56,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497196939] [2021-06-05 16:34:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:56,828 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 16:34:56,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:56,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497196939] [2021-06-05 16:34:56,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497196939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:56,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62357599] [2021-06-05 16:34:56,829 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 16:34:56,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:34:56,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:56,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:34:56,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:56,945 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 16:34:56,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62357599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:56,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:56,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:34:56,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062383462] [2021-06-05 16:34:56,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:34:56,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:56,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:34:56,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:34:56,946 INFO L87 Difference]: Start difference. First operand 3237 states and 11507 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 16:34:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:57,582 INFO L93 Difference]: Finished difference Result 5511 states and 17519 transitions. [2021-06-05 16:34:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:34:57,583 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 16:34:57,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:57,590 INFO L225 Difference]: With dead ends: 5511 [2021-06-05 16:34:57,590 INFO L226 Difference]: Without dead ends: 5480 [2021-06-05 16:34:57,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:34:57,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2021-06-05 16:34:57,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 3230. [2021-06-05 16:34:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 3.562403220811397) internal successors, (11503), 3229 states have internal predecessors, (11503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 11503 transitions. [2021-06-05 16:34:57,649 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 11503 transitions. Word has length 28 [2021-06-05 16:34:57,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:57,649 INFO L482 AbstractCegarLoop]: Abstraction has 3230 states and 11503 transitions. [2021-06-05 16:34:57,649 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 16:34:57,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 11503 transitions. [2021-06-05 16:34:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:57,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:57,653 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 16:34:57,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5793 [2021-06-05 16:34:57,854 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:57,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:57,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1850079165, now seen corresponding path program 66 times [2021-06-05 16:34:57,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:57,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197298410] [2021-06-05 16:34:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:57,885 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 16:34:57,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:57,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197298410] [2021-06-05 16:34:57,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197298410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:57,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321283605] [2021-06-05 16:34:57,885 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 16:34:57,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:34:57,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:57,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:34:57,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:57,975 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 16:34:57,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321283605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:57,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:57,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:34:57,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358484465] [2021-06-05 16:34:57,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:34:57,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:57,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:34:57,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:34:57,976 INFO L87 Difference]: Start difference. First operand 3230 states and 11503 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 16:34:58,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:58,531 INFO L93 Difference]: Finished difference Result 6692 states and 21656 transitions. [2021-06-05 16:34:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:34:58,531 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 16:34:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:58,540 INFO L225 Difference]: With dead ends: 6692 [2021-06-05 16:34:58,540 INFO L226 Difference]: Without dead ends: 6645 [2021-06-05 16:34:58,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:34:58,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6645 states. [2021-06-05 16:34:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6645 to 3393. [2021-06-05 16:34:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 3.608490566037736) internal successors, (12240), 3392 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 12240 transitions. [2021-06-05 16:34:58,608 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 12240 transitions. Word has length 28 [2021-06-05 16:34:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:58,608 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 12240 transitions. [2021-06-05 16:34:58,608 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 16:34:58,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 12240 transitions. [2021-06-05 16:34:58,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:58,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:58,612 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 16:34:58,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5794 [2021-06-05 16:34:58,813 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:58,813 INFO L82 PathProgramCache]: Analyzing trace with hash -361109379, now seen corresponding path program 67 times [2021-06-05 16:34:58,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:58,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217441566] [2021-06-05 16:34:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:58,835 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 16:34:58,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:58,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217441566] [2021-06-05 16:34:58,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217441566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:58,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276120808] [2021-06-05 16:34:58,835 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 16:34:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:58,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:34:58,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:58,913 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 16:34:58,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276120808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:58,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:58,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:34:58,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690063996] [2021-06-05 16:34:58,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:34:58,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:58,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:34:58,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:34:58,914 INFO L87 Difference]: Start difference. First operand 3393 states and 12240 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 16:34:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:59,068 INFO L93 Difference]: Finished difference Result 5080 states and 16859 transitions. [2021-06-05 16:34:59,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:34:59,068 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 16:34:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:59,075 INFO L225 Difference]: With dead ends: 5080 [2021-06-05 16:34:59,075 INFO L226 Difference]: Without dead ends: 5080 [2021-06-05 16:34:59,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:34:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2021-06-05 16:34:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 3225. [2021-06-05 16:34:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 3.5688585607940446) internal successors, (11506), 3224 states have internal predecessors, (11506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 11506 transitions. [2021-06-05 16:34:59,127 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 11506 transitions. Word has length 28 [2021-06-05 16:34:59,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:59,127 INFO L482 AbstractCegarLoop]: Abstraction has 3225 states and 11506 transitions. [2021-06-05 16:34:59,127 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 16:34:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 11506 transitions. [2021-06-05 16:34:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:34:59,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:59,131 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 16:34:59,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5795 [2021-06-05 16:34:59,332 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:59,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1707790945, now seen corresponding path program 68 times [2021-06-05 16:34:59,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:59,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038395854] [2021-06-05 16:34:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:59,379 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 16:34:59,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:59,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038395854] [2021-06-05 16:34:59,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038395854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:59,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476226175] [2021-06-05 16:34:59,379 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 16:34:59,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:34:59,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:59,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:34:59,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:59,475 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 16:34:59,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476226175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:59,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:59,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:34:59,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709057276] [2021-06-05 16:34:59,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:34:59,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:34:59,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:34:59,476 INFO L87 Difference]: Start difference. First operand 3225 states and 11506 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 16:35:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:00,107 INFO L93 Difference]: Finished difference Result 7140 states and 22841 transitions. [2021-06-05 16:35:00,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:35:00,108 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 16:35:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:00,117 INFO L225 Difference]: With dead ends: 7140 [2021-06-05 16:35:00,117 INFO L226 Difference]: Without dead ends: 7140 [2021-06-05 16:35:00,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 370.5ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:35:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-06-05 16:35:00,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 3255. [2021-06-05 16:35:00,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 3254 states have (on average 3.5682237246465887) internal successors, (11611), 3254 states have internal predecessors, (11611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 11611 transitions. [2021-06-05 16:35:00,184 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 11611 transitions. Word has length 28 [2021-06-05 16:35:00,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:00,184 INFO L482 AbstractCegarLoop]: Abstraction has 3255 states and 11611 transitions. [2021-06-05 16:35:00,184 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 16:35:00,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 11611 transitions. [2021-06-05 16:35:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:00,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:00,188 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 16:35:00,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5796,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:00,389 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:00,389 INFO L82 PathProgramCache]: Analyzing trace with hash -922876851, now seen corresponding path program 69 times [2021-06-05 16:35:00,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:00,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868490192] [2021-06-05 16:35:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:00,424 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 16:35:00,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:00,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868490192] [2021-06-05 16:35:00,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868490192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:00,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929119755] [2021-06-05 16:35:00,425 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 16:35:00,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:35:00,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:00,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:00,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:00,529 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 16:35:00,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929119755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:00,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:00,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:35:00,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653104738] [2021-06-05 16:35:00,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:00,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:00,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:00,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:00,530 INFO L87 Difference]: Start difference. First operand 3255 states and 11611 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 16:35:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:01,276 INFO L93 Difference]: Finished difference Result 7432 states and 23809 transitions. [2021-06-05 16:35:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:35:01,276 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 16:35:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:01,287 INFO L225 Difference]: With dead ends: 7432 [2021-06-05 16:35:01,288 INFO L226 Difference]: Without dead ends: 7432 [2021-06-05 16:35:01,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:35:01,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2021-06-05 16:35:01,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 3385. [2021-06-05 16:35:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 3.551418439716312) internal successors, (12018), 3384 states have internal predecessors, (12018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 12018 transitions. [2021-06-05 16:35:01,361 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 12018 transitions. Word has length 28 [2021-06-05 16:35:01,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:01,362 INFO L482 AbstractCegarLoop]: Abstraction has 3385 states and 12018 transitions. [2021-06-05 16:35:01,362 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 16:35:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 12018 transitions. [2021-06-05 16:35:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:01,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:01,366 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 16:35:01,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5797,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:01,566 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:01,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2005899507, now seen corresponding path program 70 times [2021-06-05 16:35:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:01,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049636127] [2021-06-05 16:35:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:01,607 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 16:35:01,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:01,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049636127] [2021-06-05 16:35:01,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049636127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:01,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576444317] [2021-06-05 16:35:01,608 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 16:35:01,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:01,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:01,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:01,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:01,699 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 16:35:01,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576444317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:01,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:01,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:35:01,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745622716] [2021-06-05 16:35:01,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:01,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:01,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:01,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:01,700 INFO L87 Difference]: Start difference. First operand 3385 states and 12018 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 16:35:02,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:02,320 INFO L93 Difference]: Finished difference Result 7940 states and 25456 transitions. [2021-06-05 16:35:02,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:35:02,321 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 16:35:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:02,333 INFO L225 Difference]: With dead ends: 7940 [2021-06-05 16:35:02,333 INFO L226 Difference]: Without dead ends: 7927 [2021-06-05 16:35:02,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:35:02,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-06-05 16:35:02,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 4042. [2021-06-05 16:35:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 4041 states have (on average 3.5921801534273694) internal successors, (14516), 4041 states have internal predecessors, (14516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 14516 transitions. [2021-06-05 16:35:02,438 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 14516 transitions. Word has length 28 [2021-06-05 16:35:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:02,439 INFO L482 AbstractCegarLoop]: Abstraction has 4042 states and 14516 transitions. [2021-06-05 16:35:02,439 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 16:35:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 14516 transitions. [2021-06-05 16:35:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:02,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:02,444 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 16:35:02,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5798,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:02,645 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:02,645 INFO L82 PathProgramCache]: Analyzing trace with hash -534821389, now seen corresponding path program 71 times [2021-06-05 16:35:02,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:02,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811630292] [2021-06-05 16:35:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:02,684 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 16:35:02,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:02,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811630292] [2021-06-05 16:35:02,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811630292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:02,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991835384] [2021-06-05 16:35:02,685 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 16:35:02,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:35:02,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:02,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:02,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:02,779 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 16:35:02,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991835384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:02,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:02,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:35:02,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85633333] [2021-06-05 16:35:02,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:02,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:02,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:02,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:02,780 INFO L87 Difference]: Start difference. First operand 4042 states and 14516 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 16:35:03,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:03,532 INFO L93 Difference]: Finished difference Result 8192 states and 26150 transitions. [2021-06-05 16:35:03,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:35:03,533 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 16:35:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:03,547 INFO L225 Difference]: With dead ends: 8192 [2021-06-05 16:35:03,547 INFO L226 Difference]: Without dead ends: 8192 [2021-06-05 16:35:03,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:35:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8192 states. [2021-06-05 16:35:03,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8192 to 3795. [2021-06-05 16:35:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 3.5579862941486557) internal successors, (13499), 3794 states have internal predecessors, (13499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 13499 transitions. [2021-06-05 16:35:03,651 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 13499 transitions. Word has length 28 [2021-06-05 16:35:03,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:03,651 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 13499 transitions. [2021-06-05 16:35:03,651 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 16:35:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 13499 transitions. [2021-06-05 16:35:03,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:03,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:03,657 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 16:35:03,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5799,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:03,872 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:03,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:03,872 INFO L82 PathProgramCache]: Analyzing trace with hash -967697993, now seen corresponding path program 72 times [2021-06-05 16:35:03,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:03,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856459908] [2021-06-05 16:35:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:03,903 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 16:35:03,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:03,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856459908] [2021-06-05 16:35:03,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856459908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:03,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292001898] [2021-06-05 16:35:03,904 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 16:35:03,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:35:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:03,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:03,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:03,994 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 16:35:03,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292001898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:03,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:03,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:35:03,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304531270] [2021-06-05 16:35:03,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:03,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:03,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:03,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:03,995 INFO L87 Difference]: Start difference. First operand 3795 states and 13499 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 16:35:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:04,748 INFO L93 Difference]: Finished difference Result 7285 states and 23940 transitions. [2021-06-05 16:35:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:35:04,748 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 16:35:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:04,763 INFO L225 Difference]: With dead ends: 7285 [2021-06-05 16:35:04,763 INFO L226 Difference]: Without dead ends: 7281 [2021-06-05 16:35:04,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 446.9ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:35:04,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7281 states. [2021-06-05 16:35:04,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7281 to 3428. [2021-06-05 16:35:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 3.604610446454625) internal successors, (12353), 3427 states have internal predecessors, (12353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 12353 transitions. [2021-06-05 16:35:04,848 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 12353 transitions. Word has length 28 [2021-06-05 16:35:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:04,848 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 12353 transitions. [2021-06-05 16:35:04,848 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 16:35:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 12353 transitions. [2021-06-05 16:35:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:04,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:04,854 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 16:35:05,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5800,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:05,055 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:05,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:05,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1239707183, now seen corresponding path program 73 times [2021-06-05 16:35:05,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:05,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456107359] [2021-06-05 16:35:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:05,097 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 16:35:05,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:05,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456107359] [2021-06-05 16:35:05,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456107359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:05,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027183127] [2021-06-05 16:35:05,097 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 16:35:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:05,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:05,246 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 16:35:05,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027183127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:05,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:05,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:35:05,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174300053] [2021-06-05 16:35:05,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:05,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:05,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:05,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:05,247 INFO L87 Difference]: Start difference. First operand 3428 states and 12353 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 16:35:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:06,489 INFO L93 Difference]: Finished difference Result 11601 states and 38335 transitions. [2021-06-05 16:35:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:35:06,492 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 16:35:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:06,512 INFO L225 Difference]: With dead ends: 11601 [2021-06-05 16:35:06,513 INFO L226 Difference]: Without dead ends: 11601 [2021-06-05 16:35:06,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 692.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:35:06,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11601 states. [2021-06-05 16:35:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11601 to 3716. [2021-06-05 16:35:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 3.6855989232839836) internal successors, (13692), 3715 states have internal predecessors, (13692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 13692 transitions. [2021-06-05 16:35:06,639 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 13692 transitions. Word has length 28 [2021-06-05 16:35:06,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:06,639 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 13692 transitions. [2021-06-05 16:35:06,639 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 16:35:06,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 13692 transitions. [2021-06-05 16:35:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:06,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:06,644 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 16:35:06,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5801 [2021-06-05 16:35:06,845 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash -672755103, now seen corresponding path program 74 times [2021-06-05 16:35:06,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:06,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032081645] [2021-06-05 16:35:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:06,880 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 16:35:06,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:06,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032081645] [2021-06-05 16:35:06,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032081645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:06,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890522958] [2021-06-05 16:35:06,880 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 16:35:06,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:06,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:06,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:06,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:07,003 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 16:35:07,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890522958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:07,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:07,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:35:07,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109021540] [2021-06-05 16:35:07,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:07,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:07,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:07,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:07,004 INFO L87 Difference]: Start difference. First operand 3716 states and 13692 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 16:35:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:08,246 INFO L93 Difference]: Finished difference Result 11295 states and 37518 transitions. [2021-06-05 16:35:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:35:08,246 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 16:35:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:08,265 INFO L225 Difference]: With dead ends: 11295 [2021-06-05 16:35:08,265 INFO L226 Difference]: Without dead ends: 11295 [2021-06-05 16:35:08,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 636.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:35:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2021-06-05 16:35:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 3670. [2021-06-05 16:35:08,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 3.666121559007904) internal successors, (13451), 3669 states have internal predecessors, (13451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 13451 transitions. [2021-06-05 16:35:08,376 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 13451 transitions. Word has length 28 [2021-06-05 16:35:08,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:08,377 INFO L482 AbstractCegarLoop]: Abstraction has 3670 states and 13451 transitions. [2021-06-05 16:35:08,377 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 16:35:08,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 13451 transitions. [2021-06-05 16:35:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:08,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:08,382 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 16:35:08,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5802,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:08,582 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:08,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1845100961, now seen corresponding path program 75 times [2021-06-05 16:35:08,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:08,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371810443] [2021-06-05 16:35:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:08,614 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 16:35:08,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:08,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371810443] [2021-06-05 16:35:08,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371810443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:08,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167742538] [2021-06-05 16:35:08,614 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 16:35:08,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:35:08,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:08,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:08,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:08,718 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 16:35:08,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167742538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:08,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:08,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:35:08,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803806823] [2021-06-05 16:35:08,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:08,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:08,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:08,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:08,719 INFO L87 Difference]: Start difference. First operand 3670 states and 13451 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 16:35:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:09,594 INFO L93 Difference]: Finished difference Result 10610 states and 34061 transitions. [2021-06-05 16:35:09,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:35:09,594 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 16:35:09,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:09,611 INFO L225 Difference]: With dead ends: 10610 [2021-06-05 16:35:09,611 INFO L226 Difference]: Without dead ends: 10610 [2021-06-05 16:35:09,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:35:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10610 states. [2021-06-05 16:35:09,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10610 to 3710. [2021-06-05 16:35:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3710 states, 3709 states have (on average 3.6702615260177947) internal successors, (13613), 3709 states have internal predecessors, (13613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 13613 transitions. [2021-06-05 16:35:09,727 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 13613 transitions. Word has length 28 [2021-06-05 16:35:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:09,727 INFO L482 AbstractCegarLoop]: Abstraction has 3710 states and 13613 transitions. [2021-06-05 16:35:09,727 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 16:35:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 13613 transitions. [2021-06-05 16:35:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:09,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:09,732 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 16:35:09,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5803,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:09,933 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1763724873, now seen corresponding path program 76 times [2021-06-05 16:35:09,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:09,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220128265] [2021-06-05 16:35:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:09,965 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 16:35:09,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:09,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220128265] [2021-06-05 16:35:09,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220128265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:09,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194656949] [2021-06-05 16:35:09,966 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 16:35:09,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:09,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:09,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:10,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:10,072 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 16:35:10,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194656949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:10,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:10,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:35:10,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611063667] [2021-06-05 16:35:10,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:10,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:10,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:10,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:10,073 INFO L87 Difference]: Start difference. First operand 3710 states and 13613 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 16:35:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:11,013 INFO L93 Difference]: Finished difference Result 9989 states and 32538 transitions. [2021-06-05 16:35:11,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:35:11,014 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 16:35:11,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:11,029 INFO L225 Difference]: With dead ends: 9989 [2021-06-05 16:35:11,030 INFO L226 Difference]: Without dead ends: 9981 [2021-06-05 16:35:11,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:35:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-06-05 16:35:11,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 3676. [2021-06-05 16:35:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3675 states have (on average 3.6653061224489796) internal successors, (13470), 3675 states have internal predecessors, (13470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 13470 transitions. [2021-06-05 16:35:11,141 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 13470 transitions. Word has length 28 [2021-06-05 16:35:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:11,141 INFO L482 AbstractCegarLoop]: Abstraction has 3676 states and 13470 transitions. [2021-06-05 16:35:11,141 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 16:35:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 13470 transitions. [2021-06-05 16:35:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:11,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:11,146 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 16:35:11,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5804,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:11,361 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash -833067657, now seen corresponding path program 77 times [2021-06-05 16:35:11,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:11,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950361868] [2021-06-05 16:35:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:11,393 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 16:35:11,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:11,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950361868] [2021-06-05 16:35:11,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950361868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:11,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827269961] [2021-06-05 16:35:11,394 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 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 16:35:11,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:35:11,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:11,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:11,518 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 16:35:11,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827269961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:11,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:11,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:35:11,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518723488] [2021-06-05 16:35:11,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:11,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:11,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:11,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:11,519 INFO L87 Difference]: Start difference. First operand 3676 states and 13470 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 16:35:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:12,484 INFO L93 Difference]: Finished difference Result 9584 states and 31413 transitions. [2021-06-05 16:35:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 16:35:12,484 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 16:35:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:12,500 INFO L225 Difference]: With dead ends: 9584 [2021-06-05 16:35:12,500 INFO L226 Difference]: Without dead ends: 9584 [2021-06-05 16:35:12,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 521.7ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:35:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9584 states. [2021-06-05 16:35:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9584 to 3692. [2021-06-05 16:35:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3692 states, 3691 states have (on average 3.666756976429152) internal successors, (13534), 3691 states have internal predecessors, (13534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3692 states to 3692 states and 13534 transitions. [2021-06-05 16:35:12,601 INFO L78 Accepts]: Start accepts. Automaton has 3692 states and 13534 transitions. Word has length 28 [2021-06-05 16:35:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:12,601 INFO L482 AbstractCegarLoop]: Abstraction has 3692 states and 13534 transitions. [2021-06-05 16:35:12,601 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 16:35:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3692 states and 13534 transitions. [2021-06-05 16:35:12,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:12,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:12,606 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 16:35:12,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5805 [2021-06-05 16:35:12,809 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:12,809 INFO L82 PathProgramCache]: Analyzing trace with hash 809971497, now seen corresponding path program 78 times [2021-06-05 16:35:12,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:12,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73052735] [2021-06-05 16:35:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:12,851 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 16:35:12,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:12,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73052735] [2021-06-05 16:35:12,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73052735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:12,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913039087] [2021-06-05 16:35:12,852 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 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 16:35:12,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:35:12,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:12,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:12,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:12,963 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 16:35:12,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913039087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:12,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:12,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:35:12,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381234011] [2021-06-05 16:35:12,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:12,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:12,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:12,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:12,964 INFO L87 Difference]: Start difference. First operand 3692 states and 13534 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 16:35:14,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:14,013 INFO L93 Difference]: Finished difference Result 9249 states and 30618 transitions. [2021-06-05 16:35:14,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:35:14,013 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 16:35:14,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:14,028 INFO L225 Difference]: With dead ends: 9249 [2021-06-05 16:35:14,028 INFO L226 Difference]: Without dead ends: 9241 [2021-06-05 16:35:14,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 616.7ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:35:14,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2021-06-05 16:35:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 3360. [2021-06-05 16:35:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.5802322119678474) internal successors, (12026), 3359 states have internal predecessors, (12026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 12026 transitions. [2021-06-05 16:35:14,128 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 12026 transitions. Word has length 28 [2021-06-05 16:35:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:14,128 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 12026 transitions. [2021-06-05 16:35:14,128 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 16:35:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 12026 transitions. [2021-06-05 16:35:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:14,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:14,132 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 16:35:14,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5806 [2021-06-05 16:35:14,349 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:14,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:14,349 INFO L82 PathProgramCache]: Analyzing trace with hash 893375077, now seen corresponding path program 79 times [2021-06-05 16:35:14,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:14,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350828660] [2021-06-05 16:35:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:14,383 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 16:35:14,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:14,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350828660] [2021-06-05 16:35:14,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350828660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:14,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400154919] [2021-06-05 16:35:14,383 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 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 16:35:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:14,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:14,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:14,528 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 16:35:14,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400154919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:14,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:14,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:35:14,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769185914] [2021-06-05 16:35:14,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:14,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:14,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:14,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:14,529 INFO L87 Difference]: Start difference. First operand 3360 states and 12026 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 16:35:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:15,386 INFO L93 Difference]: Finished difference Result 7017 states and 22977 transitions. [2021-06-05 16:35:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:35:15,386 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 16:35:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:15,396 INFO L225 Difference]: With dead ends: 7017 [2021-06-05 16:35:15,397 INFO L226 Difference]: Without dead ends: 7017 [2021-06-05 16:35:15,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:35:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-06-05 16:35:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 3372. [2021-06-05 16:35:15,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3371 states have (on average 3.5787600118659153) internal successors, (12064), 3371 states have internal predecessors, (12064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 12064 transitions. [2021-06-05 16:35:15,479 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 12064 transitions. Word has length 28 [2021-06-05 16:35:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:15,479 INFO L482 AbstractCegarLoop]: Abstraction has 3372 states and 12064 transitions. [2021-06-05 16:35:15,479 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 16:35:15,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 12064 transitions. [2021-06-05 16:35:15,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:15,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:15,484 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 16:35:15,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5807 [2021-06-05 16:35:15,684 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:15,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:15,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1748232043, now seen corresponding path program 80 times [2021-06-05 16:35:15,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:15,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241072190] [2021-06-05 16:35:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:15,754 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 16:35:15,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:15,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241072190] [2021-06-05 16:35:15,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241072190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:15,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845951511] [2021-06-05 16:35:15,754 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 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 16:35:15,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:15,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:15,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:15,886 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 16:35:15,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845951511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:15,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:15,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:35:15,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350080159] [2021-06-05 16:35:15,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:15,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:15,887 INFO L87 Difference]: Start difference. First operand 3372 states and 12064 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 16:35:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:16,974 INFO L93 Difference]: Finished difference Result 7945 states and 25366 transitions. [2021-06-05 16:35:16,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:35:16,974 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 16:35:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:16,986 INFO L225 Difference]: With dead ends: 7945 [2021-06-05 16:35:16,986 INFO L226 Difference]: Without dead ends: 7945 [2021-06-05 16:35:16,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 735.9ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:35:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-05 16:35:17,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 3438. [2021-06-05 16:35:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.5731742798952575) internal successors, (12281), 3437 states have internal predecessors, (12281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 12281 transitions. [2021-06-05 16:35:17,071 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 12281 transitions. Word has length 28 [2021-06-05 16:35:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:17,071 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 12281 transitions. [2021-06-05 16:35:17,071 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 16:35:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 12281 transitions. [2021-06-05 16:35:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:17,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:17,075 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 16:35:17,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5808 [2021-06-05 16:35:17,276 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:17,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:17,276 INFO L82 PathProgramCache]: Analyzing trace with hash -105192889, now seen corresponding path program 81 times [2021-06-05 16:35:17,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:17,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543561416] [2021-06-05 16:35:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:17,309 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 16:35:17,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:17,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543561416] [2021-06-05 16:35:17,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543561416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:17,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947787256] [2021-06-05 16:35:17,309 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 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 16:35:17,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:35:17,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:17,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:17,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:17,428 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 16:35:17,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947787256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:17,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:17,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:35:17,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579659360] [2021-06-05 16:35:17,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:17,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:17,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:17,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:17,429 INFO L87 Difference]: Start difference. First operand 3438 states and 12281 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 16:35:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:18,366 INFO L93 Difference]: Finished difference Result 7328 states and 23738 transitions. [2021-06-05 16:35:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:35:18,366 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 16:35:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:18,378 INFO L225 Difference]: With dead ends: 7328 [2021-06-05 16:35:18,378 INFO L226 Difference]: Without dead ends: 7324 [2021-06-05 16:35:18,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:35:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2021-06-05 16:35:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 3373. [2021-06-05 16:35:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3372 states have (on average 3.5711743772241995) internal successors, (12042), 3372 states have internal predecessors, (12042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 12042 transitions. [2021-06-05 16:35:18,475 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 12042 transitions. Word has length 28 [2021-06-05 16:35:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:18,475 INFO L482 AbstractCegarLoop]: Abstraction has 3373 states and 12042 transitions. [2021-06-05 16:35:18,475 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 16:35:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 12042 transitions. [2021-06-05 16:35:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:18,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:18,479 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 16:35:18,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5809 [2021-06-05 16:35:18,680 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:18,680 INFO L82 PathProgramCache]: Analyzing trace with hash 474250335, now seen corresponding path program 72 times [2021-06-05 16:35:18,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:18,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518258603] [2021-06-05 16:35:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:18,721 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 16:35:18,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:18,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518258603] [2021-06-05 16:35:18,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518258603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:18,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415091488] [2021-06-05 16:35:18,722 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 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 16:35:18,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:35:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:18,817 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 16:35:18,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415091488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:18,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:18,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:35:18,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629991868] [2021-06-05 16:35:18,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:18,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:18,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:18,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:18,818 INFO L87 Difference]: Start difference. First operand 3373 states and 12042 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 16:35:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:19,377 INFO L93 Difference]: Finished difference Result 6471 states and 21326 transitions. [2021-06-05 16:35:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:35:19,377 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 16:35:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:19,387 INFO L225 Difference]: With dead ends: 6471 [2021-06-05 16:35:19,387 INFO L226 Difference]: Without dead ends: 6471 [2021-06-05 16:35:19,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:35:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-05 16:35:19,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 3377. [2021-06-05 16:35:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 3.572867298578199) internal successors, (12062), 3376 states have internal predecessors, (12062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 12062 transitions. [2021-06-05 16:35:19,453 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 12062 transitions. Word has length 28 [2021-06-05 16:35:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:19,453 INFO L482 AbstractCegarLoop]: Abstraction has 3377 states and 12062 transitions. [2021-06-05 16:35:19,453 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 16:35:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 12062 transitions. [2021-06-05 16:35:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:19,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:19,458 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 16:35:19,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:19,658 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:19,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:19,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1137549427, now seen corresponding path program 73 times [2021-06-05 16:35:19,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:19,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746910843] [2021-06-05 16:35:19,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:19,696 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 16:35:19,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:19,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746910843] [2021-06-05 16:35:19,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746910843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:19,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220968493] [2021-06-05 16:35:19,696 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 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 16:35:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:19,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:19,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:19,797 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 16:35:19,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220968493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:19,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:19,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:35:19,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602983955] [2021-06-05 16:35:19,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:19,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:19,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:19,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:19,798 INFO L87 Difference]: Start difference. First operand 3377 states and 12062 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 16:35:20,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:20,556 INFO L93 Difference]: Finished difference Result 6945 states and 22648 transitions. [2021-06-05 16:35:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:35:20,557 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 16:35:20,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:20,567 INFO L225 Difference]: With dead ends: 6945 [2021-06-05 16:35:20,567 INFO L226 Difference]: Without dead ends: 6945 [2021-06-05 16:35:20,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 466.5ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:35:20,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6945 states. [2021-06-05 16:35:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6945 to 3391. [2021-06-05 16:35:20,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 3390 states have (on average 3.5702064896755163) internal successors, (12103), 3390 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 12103 transitions. [2021-06-05 16:35:20,642 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 12103 transitions. Word has length 28 [2021-06-05 16:35:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:20,642 INFO L482 AbstractCegarLoop]: Abstraction has 3391 states and 12103 transitions. [2021-06-05 16:35:20,642 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 16:35:20,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 12103 transitions. [2021-06-05 16:35:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:20,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:20,646 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 16:35:20,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5811 [2021-06-05 16:35:20,847 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:20,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:20,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1369089075, now seen corresponding path program 74 times [2021-06-05 16:35:20,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:20,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21678600] [2021-06-05 16:35:20,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:20,901 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 16:35:20,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21678600] [2021-06-05 16:35:20,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21678600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:20,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397519244] [2021-06-05 16:35:20,901 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 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 16:35:20,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:20,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:20,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:20,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:21,006 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 16:35:21,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397519244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:21,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:21,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:35:21,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256521545] [2021-06-05 16:35:21,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:21,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:21,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:21,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:21,007 INFO L87 Difference]: Start difference. First operand 3391 states and 12103 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 16:35:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:21,861 INFO L93 Difference]: Finished difference Result 7449 states and 24075 transitions. [2021-06-05 16:35:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:35:21,861 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 16:35:21,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:21,872 INFO L225 Difference]: With dead ends: 7449 [2021-06-05 16:35:21,872 INFO L226 Difference]: Without dead ends: 7449 [2021-06-05 16:35:21,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:35:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7449 states. [2021-06-05 16:35:21,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7449 to 3471. [2021-06-05 16:35:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 3.563400576368876) internal successors, (12365), 3470 states have internal predecessors, (12365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 12365 transitions. [2021-06-05 16:35:21,953 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 12365 transitions. Word has length 28 [2021-06-05 16:35:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:21,953 INFO L482 AbstractCegarLoop]: Abstraction has 3471 states and 12365 transitions. [2021-06-05 16:35:21,953 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 16:35:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 12365 transitions. [2021-06-05 16:35:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:21,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:21,957 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 16:35:22,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5812,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:22,158 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:22,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1349373261, now seen corresponding path program 75 times [2021-06-05 16:35:22,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:22,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221052613] [2021-06-05 16:35:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:22,199 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 16:35:22,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:22,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221052613] [2021-06-05 16:35:22,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221052613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:22,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085404357] [2021-06-05 16:35:22,200 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 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 16:35:22,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:35:22,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:22,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:22,320 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 16:35:22,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085404357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:22,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:22,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:35:22,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276695133] [2021-06-05 16:35:22,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:22,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:22,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:22,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:22,321 INFO L87 Difference]: Start difference. First operand 3471 states and 12365 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 16:35:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:22,833 INFO L93 Difference]: Finished difference Result 7261 states and 24833 transitions. [2021-06-05 16:35:22,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:35:22,833 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 16:35:22,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:22,844 INFO L225 Difference]: With dead ends: 7261 [2021-06-05 16:35:22,844 INFO L226 Difference]: Without dead ends: 7261 [2021-06-05 16:35:22,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:35:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7261 states. [2021-06-05 16:35:22,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7261 to 4582. [2021-06-05 16:35:22,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4581 states have (on average 3.6797642436149314) internal successors, (16857), 4581 states have internal predecessors, (16857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:22,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 16857 transitions. [2021-06-05 16:35:22,932 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 16857 transitions. Word has length 28 [2021-06-05 16:35:22,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:22,932 INFO L482 AbstractCegarLoop]: Abstraction has 4582 states and 16857 transitions. [2021-06-05 16:35:22,932 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 16:35:22,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 16857 transitions. [2021-06-05 16:35:22,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:22,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:22,939 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 16:35:23,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5813,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:23,145 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1413910217, now seen corresponding path program 76 times [2021-06-05 16:35:23,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:23,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162391159] [2021-06-05 16:35:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:23,186 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 16:35:23,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:23,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162391159] [2021-06-05 16:35:23,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162391159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:23,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971398314] [2021-06-05 16:35:23,186 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 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 16:35:23,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:23,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:23,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:23,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:23,280 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 16:35:23,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971398314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:23,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:23,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:35:23,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533325498] [2021-06-05 16:35:23,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:23,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:23,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:23,281 INFO L87 Difference]: Start difference. First operand 4582 states and 16857 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 16:35:24,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:24,052 INFO L93 Difference]: Finished difference Result 8354 states and 28597 transitions. [2021-06-05 16:35:24,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:35:24,052 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 16:35:24,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:24,065 INFO L225 Difference]: With dead ends: 8354 [2021-06-05 16:35:24,066 INFO L226 Difference]: Without dead ends: 8350 [2021-06-05 16:35:24,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:35:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8350 states. [2021-06-05 16:35:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8350 to 4474. [2021-06-05 16:35:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 3.6908115358819584) internal successors, (16509), 4473 states have internal predecessors, (16509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 16509 transitions. [2021-06-05 16:35:24,157 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 16509 transitions. Word has length 28 [2021-06-05 16:35:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:24,157 INFO L482 AbstractCegarLoop]: Abstraction has 4474 states and 16509 transitions. [2021-06-05 16:35:24,158 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 16:35:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 16509 transitions. [2021-06-05 16:35:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:24,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:24,164 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, 1, 1] [2021-06-05 16:35:24,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5814,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:24,364 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:24,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:24,364 INFO L82 PathProgramCache]: Analyzing trace with hash 606347251, now seen corresponding path program 82 times [2021-06-05 16:35:24,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:24,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870304682] [2021-06-05 16:35:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:24,404 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 16:35:24,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:24,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870304682] [2021-06-05 16:35:24,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870304682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:24,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624368998] [2021-06-05 16:35:24,404 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 16:35:24,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:24,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:24,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:24,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:24,508 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 16:35:24,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624368998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:24,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:24,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:35:24,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067578780] [2021-06-05 16:35:24,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:24,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:24,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:24,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:24,509 INFO L87 Difference]: Start difference. First operand 4474 states and 16509 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 16:35:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:25,346 INFO L93 Difference]: Finished difference Result 9509 states and 32189 transitions. [2021-06-05 16:35:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:35:25,346 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 16:35:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:25,362 INFO L225 Difference]: With dead ends: 9509 [2021-06-05 16:35:25,362 INFO L226 Difference]: Without dead ends: 9497 [2021-06-05 16:35:25,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 454.6ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:35:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-06-05 16:35:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 4945. [2021-06-05 16:35:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4945 states, 4944 states have (on average 3.7744741100323624) internal successors, (18661), 4944 states have internal predecessors, (18661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4945 states to 4945 states and 18661 transitions. [2021-06-05 16:35:25,468 INFO L78 Accepts]: Start accepts. Automaton has 4945 states and 18661 transitions. Word has length 28 [2021-06-05 16:35:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:25,468 INFO L482 AbstractCegarLoop]: Abstraction has 4945 states and 18661 transitions. [2021-06-05 16:35:25,468 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 16:35:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 4945 states and 18661 transitions. [2021-06-05 16:35:25,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:25,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:25,474 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 16:35:25,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5815 [2021-06-05 16:35:25,675 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:25,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1647278645, now seen corresponding path program 83 times [2021-06-05 16:35:25,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:25,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763764509] [2021-06-05 16:35:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:25,702 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 16:35:25,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:25,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763764509] [2021-06-05 16:35:25,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763764509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:25,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411776216] [2021-06-05 16:35:25,702 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 16:35:25,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:35:25,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:25,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:25,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:25,807 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 16:35:25,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411776216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:25,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:25,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:35:25,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030335981] [2021-06-05 16:35:25,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:25,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:25,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:25,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:25,808 INFO L87 Difference]: Start difference. First operand 4945 states and 18661 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 16:35:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:26,642 INFO L93 Difference]: Finished difference Result 9844 states and 33233 transitions. [2021-06-05 16:35:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:35:26,643 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 16:35:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:26,659 INFO L225 Difference]: With dead ends: 9844 [2021-06-05 16:35:26,659 INFO L226 Difference]: Without dead ends: 9844 [2021-06-05 16:35:26,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 477.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:35:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9844 states. [2021-06-05 16:35:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9844 to 4966. [2021-06-05 16:35:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4966 states, 4965 states have (on average 3.7593152064451156) internal successors, (18665), 4965 states have internal predecessors, (18665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4966 states to 4966 states and 18665 transitions. [2021-06-05 16:35:26,771 INFO L78 Accepts]: Start accepts. Automaton has 4966 states and 18665 transitions. Word has length 28 [2021-06-05 16:35:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:26,771 INFO L482 AbstractCegarLoop]: Abstraction has 4966 states and 18665 transitions. [2021-06-05 16:35:26,771 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 16:35:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4966 states and 18665 transitions. [2021-06-05 16:35:26,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:26,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:26,778 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 16:35:26,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5816,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:26,979 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:26,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:26,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1444282361, now seen corresponding path program 84 times [2021-06-05 16:35:26,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:26,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102860437] [2021-06-05 16:35:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:27,010 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 16:35:27,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:27,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102860437] [2021-06-05 16:35:27,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102860437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:27,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527258049] [2021-06-05 16:35:27,010 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 16:35:27,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:35:27,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:27,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:27,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:27,090 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 16:35:27,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527258049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:27,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:27,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:35:27,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646468758] [2021-06-05 16:35:27,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:35:27,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:27,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:35:27,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:35:27,091 INFO L87 Difference]: Start difference. First operand 4966 states and 18665 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 16:35:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:27,486 INFO L93 Difference]: Finished difference Result 9292 states and 33167 transitions. [2021-06-05 16:35:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:35:27,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:35:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:27,503 INFO L225 Difference]: With dead ends: 9292 [2021-06-05 16:35:27,503 INFO L226 Difference]: Without dead ends: 9209 [2021-06-05 16:35:27,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:35:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9209 states. [2021-06-05 16:35:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9209 to 6387. [2021-06-05 16:35:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6387 states, 6386 states have (on average 3.8042593172564985) internal successors, (24294), 6386 states have internal predecessors, (24294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6387 states to 6387 states and 24294 transitions. [2021-06-05 16:35:27,639 INFO L78 Accepts]: Start accepts. Automaton has 6387 states and 24294 transitions. Word has length 28 [2021-06-05 16:35:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:27,639 INFO L482 AbstractCegarLoop]: Abstraction has 6387 states and 24294 transitions. [2021-06-05 16:35:27,639 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 16:35:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 6387 states and 24294 transitions. [2021-06-05 16:35:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:27,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:27,649 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 16:35:27,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5817 [2021-06-05 16:35:27,850 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:27,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1642669955, now seen corresponding path program 85 times [2021-06-05 16:35:27,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:27,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989954510] [2021-06-05 16:35:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:27,875 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 16:35:27,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:27,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989954510] [2021-06-05 16:35:27,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989954510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:27,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484180235] [2021-06-05 16:35:27,875 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 16:35:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:27,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:35:27,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:27,948 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 16:35:27,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484180235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:27,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:27,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:35:27,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821325116] [2021-06-05 16:35:27,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:35:27,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:27,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:35:27,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:35:27,949 INFO L87 Difference]: Start difference. First operand 6387 states and 24294 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 16:35:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:28,125 INFO L93 Difference]: Finished difference Result 8813 states and 31347 transitions. [2021-06-05 16:35:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:35:28,126 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 16:35:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:28,141 INFO L225 Difference]: With dead ends: 8813 [2021-06-05 16:35:28,142 INFO L226 Difference]: Without dead ends: 8813 [2021-06-05 16:35:28,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:35:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2021-06-05 16:35:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 6533. [2021-06-05 16:35:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6533 states, 6532 states have (on average 3.7819963257807716) internal successors, (24704), 6532 states have internal predecessors, (24704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 24704 transitions. [2021-06-05 16:35:28,292 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 24704 transitions. Word has length 28 [2021-06-05 16:35:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:28,292 INFO L482 AbstractCegarLoop]: Abstraction has 6533 states and 24704 transitions. [2021-06-05 16:35:28,292 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 16:35:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 24704 transitions. [2021-06-05 16:35:28,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:28,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:28,302 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 16:35:28,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5818,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:28,509 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:28,509 INFO L82 PathProgramCache]: Analyzing trace with hash -712470211, now seen corresponding path program 86 times [2021-06-05 16:35:28,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:28,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399809705] [2021-06-05 16:35:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:28,551 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 16:35:28,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:28,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399809705] [2021-06-05 16:35:28,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399809705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:28,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371459665] [2021-06-05 16:35:28,552 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 16:35:28,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:28,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:28,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:28,635 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 16:35:28,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371459665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:28,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:28,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:35:28,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52784781] [2021-06-05 16:35:28,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:28,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:28,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:28,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:28,636 INFO L87 Difference]: Start difference. First operand 6533 states and 24704 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 16:35:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:29,422 INFO L93 Difference]: Finished difference Result 13541 states and 47408 transitions. [2021-06-05 16:35:29,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:35:29,423 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 16:35:29,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:29,449 INFO L225 Difference]: With dead ends: 13541 [2021-06-05 16:35:29,450 INFO L226 Difference]: Without dead ends: 13541 [2021-06-05 16:35:29,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 487.5ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:35:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13541 states. [2021-06-05 16:35:29,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13541 to 7282. [2021-06-05 16:35:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7282 states, 7281 states have (on average 3.7915121549237742) internal successors, (27606), 7281 states have internal predecessors, (27606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:29,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7282 states to 7282 states and 27606 transitions. [2021-06-05 16:35:29,624 INFO L78 Accepts]: Start accepts. Automaton has 7282 states and 27606 transitions. Word has length 28 [2021-06-05 16:35:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:29,624 INFO L482 AbstractCegarLoop]: Abstraction has 7282 states and 27606 transitions. [2021-06-05 16:35:29,624 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 16:35:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 7282 states and 27606 transitions. [2021-06-05 16:35:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:29,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:29,635 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 16:35:29,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5819 [2021-06-05 16:35:29,836 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1190209241, now seen corresponding path program 87 times [2021-06-05 16:35:29,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:29,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036605918] [2021-06-05 16:35:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:29,868 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 16:35:29,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:29,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036605918] [2021-06-05 16:35:29,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036605918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:29,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187308921] [2021-06-05 16:35:29,868 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 16:35:29,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:35:29,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:29,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:29,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:29,951 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 16:35:29,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187308921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:29,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:29,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:35:29,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392357954] [2021-06-05 16:35:29,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:35:29,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:29,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:35:29,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:35:29,951 INFO L87 Difference]: Start difference. First operand 7282 states and 27606 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 16:35:30,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:30,571 INFO L93 Difference]: Finished difference Result 13742 states and 48131 transitions. [2021-06-05 16:35:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:35:30,572 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 16:35:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:30,632 INFO L225 Difference]: With dead ends: 13742 [2021-06-05 16:35:30,632 INFO L226 Difference]: Without dead ends: 13742 [2021-06-05 16:35:30,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:35:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-06-05 16:35:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7548. [2021-06-05 16:35:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7548 states, 7547 states have (on average 3.7695773154895984) internal successors, (28449), 7547 states have internal predecessors, (28449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7548 states to 7548 states and 28449 transitions. [2021-06-05 16:35:30,786 INFO L78 Accepts]: Start accepts. Automaton has 7548 states and 28449 transitions. Word has length 28 [2021-06-05 16:35:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:30,786 INFO L482 AbstractCegarLoop]: Abstraction has 7548 states and 28449 transitions. [2021-06-05 16:35:30,786 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 16:35:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7548 states and 28449 transitions. [2021-06-05 16:35:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:30,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:30,799 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 16:35:30,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5820 [2021-06-05 16:35:30,999 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:31,000 INFO L82 PathProgramCache]: Analyzing trace with hash 107186585, now seen corresponding path program 88 times [2021-06-05 16:35:31,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:31,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756818809] [2021-06-05 16:35:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:31,025 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 16:35:31,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:31,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756818809] [2021-06-05 16:35:31,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756818809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:31,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037272803] [2021-06-05 16:35:31,026 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 16:35:31,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:31,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:31,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:31,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:31,105 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 16:35:31,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037272803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:31,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:31,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:35:31,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413031583] [2021-06-05 16:35:31,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:35:31,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:31,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:35:31,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:35:31,106 INFO L87 Difference]: Start difference. First operand 7548 states and 28449 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 16:35:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:31,455 INFO L93 Difference]: Finished difference Result 10106 states and 36610 transitions. [2021-06-05 16:35:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:35:31,455 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 16:35:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:31,472 INFO L225 Difference]: With dead ends: 10106 [2021-06-05 16:35:31,472 INFO L226 Difference]: Without dead ends: 10076 [2021-06-05 16:35:31,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:35:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10076 states. [2021-06-05 16:35:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10076 to 8389. [2021-06-05 16:35:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8389 states, 8388 states have (on average 3.790414878397711) internal successors, (31794), 8388 states have internal predecessors, (31794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8389 states to 8389 states and 31794 transitions. [2021-06-05 16:35:31,626 INFO L78 Accepts]: Start accepts. Automaton has 8389 states and 31794 transitions. Word has length 28 [2021-06-05 16:35:31,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:31,626 INFO L482 AbstractCegarLoop]: Abstraction has 8389 states and 31794 transitions. [2021-06-05 16:35:31,626 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 16:35:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 8389 states and 31794 transitions. [2021-06-05 16:35:31,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:31,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:31,638 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 16:35:31,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5821,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:31,839 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:31,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:31,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1578264703, now seen corresponding path program 89 times [2021-06-05 16:35:31,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:31,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453782086] [2021-06-05 16:35:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:31,865 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 16:35:31,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:31,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453782086] [2021-06-05 16:35:31,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453782086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:31,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140713026] [2021-06-05 16:35:31,866 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 16:35:31,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:35:31,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:31,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:31,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:31,949 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 16:35:31,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140713026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:31,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:31,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:35:31,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056853665] [2021-06-05 16:35:31,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:35:31,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:31,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:35:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:35:31,950 INFO L87 Difference]: Start difference. First operand 8389 states and 31794 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 16:35:32,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:32,268 INFO L93 Difference]: Finished difference Result 10680 states and 38512 transitions. [2021-06-05 16:35:32,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:35:32,269 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 16:35:32,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:32,287 INFO L225 Difference]: With dead ends: 10680 [2021-06-05 16:35:32,287 INFO L226 Difference]: Without dead ends: 10680 [2021-06-05 16:35:32,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:35:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10680 states. [2021-06-05 16:35:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10680 to 8429. [2021-06-05 16:35:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8429 states, 8428 states have (on average 3.786544850498339) internal successors, (31913), 8428 states have internal predecessors, (31913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8429 states to 8429 states and 31913 transitions. [2021-06-05 16:35:32,465 INFO L78 Accepts]: Start accepts. Automaton has 8429 states and 31913 transitions. Word has length 28 [2021-06-05 16:35:32,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:32,465 INFO L482 AbstractCegarLoop]: Abstraction has 8429 states and 31913 transitions. [2021-06-05 16:35:32,465 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 16:35:32,465 INFO L276 IsEmpty]: Start isEmpty. Operand 8429 states and 31913 transitions. [2021-06-05 16:35:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:32,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:32,477 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 16:35:32,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5822,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:32,677 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:32,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1145388099, now seen corresponding path program 90 times [2021-06-05 16:35:32,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:32,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528863750] [2021-06-05 16:35:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:32,709 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 16:35:32,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:32,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528863750] [2021-06-05 16:35:32,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528863750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:32,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128392532] [2021-06-05 16:35:32,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:35:32,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:35:32,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:32,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:32,784 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 16:35:32,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128392532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:32,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:32,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:35:32,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535543409] [2021-06-05 16:35:32,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:35:32,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:32,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:35:32,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:35:32,785 INFO L87 Difference]: Start difference. First operand 8429 states and 31913 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 16:35:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:33,363 INFO L93 Difference]: Finished difference Result 14428 states and 51414 transitions. [2021-06-05 16:35:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:35:33,363 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 16:35:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:33,397 INFO L225 Difference]: With dead ends: 14428 [2021-06-05 16:35:33,397 INFO L226 Difference]: Without dead ends: 14424 [2021-06-05 16:35:33,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:35:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14424 states. [2021-06-05 16:35:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14424 to 8333. [2021-06-05 16:35:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8333 states, 8332 states have (on average 3.790326452232357) internal successors, (31581), 8332 states have internal predecessors, (31581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8333 states to 8333 states and 31581 transitions. [2021-06-05 16:35:33,607 INFO L78 Accepts]: Start accepts. Automaton has 8333 states and 31581 transitions. Word has length 28 [2021-06-05 16:35:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:33,607 INFO L482 AbstractCegarLoop]: Abstraction has 8333 states and 31581 transitions. [2021-06-05 16:35:33,607 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 16:35:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 8333 states and 31581 transitions. [2021-06-05 16:35:33,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:33,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:33,619 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 16:35:33,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5823,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:33,820 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:33,820 INFO L82 PathProgramCache]: Analyzing trace with hash 249567283, now seen corresponding path program 91 times [2021-06-05 16:35:33,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:33,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139511750] [2021-06-05 16:35:33,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:33,875 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 16:35:33,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:33,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139511750] [2021-06-05 16:35:33,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139511750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:33,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044388902] [2021-06-05 16:35:33,875 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 16:35:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:33,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:35:33,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:33,963 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 16:35:33,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044388902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:33,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:33,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:35:33,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481436419] [2021-06-05 16:35:33,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:35:33,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:33,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:35:33,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:35:33,965 INFO L87 Difference]: Start difference. First operand 8333 states and 31581 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 16:35:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:34,383 INFO L93 Difference]: Finished difference Result 10897 states and 39312 transitions. [2021-06-05 16:35:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:35:34,383 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 16:35:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:34,403 INFO L225 Difference]: With dead ends: 10897 [2021-06-05 16:35:34,403 INFO L226 Difference]: Without dead ends: 10897 [2021-06-05 16:35:34,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:35:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10897 states. [2021-06-05 16:35:34,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10897 to 8279. [2021-06-05 16:35:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8279 states, 8278 states have (on average 3.783884996375936) internal successors, (31323), 8278 states have internal predecessors, (31323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8279 states to 8279 states and 31323 transitions. [2021-06-05 16:35:34,583 INFO L78 Accepts]: Start accepts. Automaton has 8279 states and 31323 transitions. Word has length 28 [2021-06-05 16:35:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:34,584 INFO L482 AbstractCegarLoop]: Abstraction has 8279 states and 31323 transitions. [2021-06-05 16:35:34,584 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 16:35:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 8279 states and 31323 transitions. [2021-06-05 16:35:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:34,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:34,596 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 16:35:34,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5824,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:34,813 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:34,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1742724757, now seen corresponding path program 92 times [2021-06-05 16:35:34,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:34,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068126112] [2021-06-05 16:35:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:34,859 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 16:35:34,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:34,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068126112] [2021-06-05 16:35:34,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068126112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:34,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030539287] [2021-06-05 16:35:34,860 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 16:35:34,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:34,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:34,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:34,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:34,939 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 16:35:34,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030539287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:34,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:34,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:35:34,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217372768] [2021-06-05 16:35:34,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:35:34,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:34,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:35:34,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:35:34,940 INFO L87 Difference]: Start difference. First operand 8279 states and 31323 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 16:35:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:35,612 INFO L93 Difference]: Finished difference Result 14309 states and 50902 transitions. [2021-06-05 16:35:35,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:35:35,612 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 16:35:35,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:35,639 INFO L225 Difference]: With dead ends: 14309 [2021-06-05 16:35:35,640 INFO L226 Difference]: Without dead ends: 14297 [2021-06-05 16:35:35,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:35:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14297 states. [2021-06-05 16:35:35,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14297 to 8279. [2021-06-05 16:35:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8279 states, 8278 states have (on average 3.782918579366997) internal successors, (31315), 8278 states have internal predecessors, (31315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8279 states to 8279 states and 31315 transitions. [2021-06-05 16:35:35,824 INFO L78 Accepts]: Start accepts. Automaton has 8279 states and 31315 transitions. Word has length 28 [2021-06-05 16:35:35,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:35,824 INFO L482 AbstractCegarLoop]: Abstraction has 8279 states and 31315 transitions. [2021-06-05 16:35:35,824 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 16:35:35,824 INFO L276 IsEmpty]: Start isEmpty. Operand 8279 states and 31315 transitions. [2021-06-05 16:35:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:35,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:35,836 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 16:35:36,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5825 [2021-06-05 16:35:36,036 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash -25556159, now seen corresponding path program 93 times [2021-06-05 16:35:36,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:36,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300507868] [2021-06-05 16:35:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:36,077 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 16:35:36,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:36,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300507868] [2021-06-05 16:35:36,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300507868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:36,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413493698] [2021-06-05 16:35:36,077 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 16:35:36,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:35:36,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:36,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:36,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:36,173 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 16:35:36,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413493698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:36,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:36,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:35:36,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030359526] [2021-06-05 16:35:36,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:36,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:36,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:36,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:36,174 INFO L87 Difference]: Start difference. First operand 8279 states and 31315 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 16:35:37,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:37,463 INFO L93 Difference]: Finished difference Result 22023 states and 77007 transitions. [2021-06-05 16:35:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 16:35:37,463 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 16:35:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:37,504 INFO L225 Difference]: With dead ends: 22023 [2021-06-05 16:35:37,505 INFO L226 Difference]: Without dead ends: 22023 [2021-06-05 16:35:37,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 794.3ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:35:37,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22023 states. [2021-06-05 16:35:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22023 to 11426. [2021-06-05 16:35:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11426 states, 11425 states have (on average 3.8267833698030636) internal successors, (43721), 11425 states have internal predecessors, (43721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 43721 transitions. [2021-06-05 16:35:37,867 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 43721 transitions. Word has length 28 [2021-06-05 16:35:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:37,867 INFO L482 AbstractCegarLoop]: Abstraction has 11426 states and 43721 transitions. [2021-06-05 16:35:37,867 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 16:35:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 43721 transitions. [2021-06-05 16:35:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:37,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:37,885 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 16:35:38,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5826,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:38,101 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash 55819929, now seen corresponding path program 94 times [2021-06-05 16:35:38,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:38,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14093286] [2021-06-05 16:35:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:38,151 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 16:35:38,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:38,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14093286] [2021-06-05 16:35:38,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14093286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:38,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792561849] [2021-06-05 16:35:38,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:35:38,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:38,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:38,249 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 16:35:38,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792561849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:38,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:38,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:35:38,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083440077] [2021-06-05 16:35:38,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:38,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:38,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:38,250 INFO L87 Difference]: Start difference. First operand 11426 states and 43721 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 16:35:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:39,339 INFO L93 Difference]: Finished difference Result 21126 states and 74701 transitions. [2021-06-05 16:35:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:35:39,340 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 16:35:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:39,378 INFO L225 Difference]: With dead ends: 21126 [2021-06-05 16:35:39,378 INFO L226 Difference]: Without dead ends: 21114 [2021-06-05 16:35:39,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 626.0ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:35:39,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21114 states. [2021-06-05 16:35:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21114 to 11260. [2021-06-05 16:35:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11260 states, 11259 states have (on average 3.8314237498889776) internal successors, (43138), 11259 states have internal predecessors, (43138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11260 states to 11260 states and 43138 transitions. [2021-06-05 16:35:39,689 INFO L78 Accepts]: Start accepts. Automaton has 11260 states and 43138 transitions. Word has length 28 [2021-06-05 16:35:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:39,689 INFO L482 AbstractCegarLoop]: Abstraction has 11260 states and 43138 transitions. [2021-06-05 16:35:39,689 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 16:35:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 11260 states and 43138 transitions. [2021-06-05 16:35:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:39,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:39,707 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 16:35:39,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5827 [2021-06-05 16:35:39,908 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1459272043, now seen corresponding path program 95 times [2021-06-05 16:35:39,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:39,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766549357] [2021-06-05 16:35:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:39,951 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 16:35:39,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:39,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766549357] [2021-06-05 16:35:39,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766549357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:39,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004326784] [2021-06-05 16:35:39,951 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 16:35:39,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:35:39,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:39,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:40,040 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 16:35:40,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004326784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:40,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:40,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:35:40,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592855104] [2021-06-05 16:35:40,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:35:40,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:40,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:35:40,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:35:40,043 INFO L87 Difference]: Start difference. First operand 11260 states and 43138 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 16:35:40,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:40,983 INFO L93 Difference]: Finished difference Result 21002 states and 74111 transitions. [2021-06-05 16:35:40,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:35:40,984 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 16:35:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:41,022 INFO L225 Difference]: With dead ends: 21002 [2021-06-05 16:35:41,022 INFO L226 Difference]: Without dead ends: 20966 [2021-06-05 16:35:41,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 543.4ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:35:41,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20966 states. [2021-06-05 16:35:41,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20966 to 11300. [2021-06-05 16:35:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11300 states, 11299 states have (on average 3.8306044782724133) internal successors, (43282), 11299 states have internal predecessors, (43282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:41,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11300 states to 11300 states and 43282 transitions. [2021-06-05 16:35:41,375 INFO L78 Accepts]: Start accepts. Automaton has 11300 states and 43282 transitions. Word has length 28 [2021-06-05 16:35:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:41,375 INFO L482 AbstractCegarLoop]: Abstraction has 11300 states and 43282 transitions. [2021-06-05 16:35:41,375 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 16:35:41,375 INFO L276 IsEmpty]: Start isEmpty. Operand 11300 states and 43282 transitions. [2021-06-05 16:35:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:41,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:41,392 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 16:35:41,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5828,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:41,613 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:41,613 INFO L82 PathProgramCache]: Analyzing trace with hash 137854673, now seen corresponding path program 96 times [2021-06-05 16:35:41,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:41,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642126695] [2021-06-05 16:35:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:41,651 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 16:35:41,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:41,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642126695] [2021-06-05 16:35:41,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642126695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:41,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994563655] [2021-06-05 16:35:41,651 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 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 16:35:41,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:35:41,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:41,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:41,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:41,765 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 16:35:41,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994563655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:41,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:41,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:35:41,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328089134] [2021-06-05 16:35:41,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:41,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:41,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:41,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:41,766 INFO L87 Difference]: Start difference. First operand 11300 states and 43282 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 16:35:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:43,149 INFO L93 Difference]: Finished difference Result 20773 states and 73526 transitions. [2021-06-05 16:35:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:35:43,149 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 16:35:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:43,188 INFO L225 Difference]: With dead ends: 20773 [2021-06-05 16:35:43,188 INFO L226 Difference]: Without dead ends: 20773 [2021-06-05 16:35:43,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 853.3ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:35:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20773 states. [2021-06-05 16:35:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20773 to 11492. [2021-06-05 16:35:43,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11492 states, 11491 states have (on average 3.8215995126620834) internal successors, (43914), 11491 states have internal predecessors, (43914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11492 states to 11492 states and 43914 transitions. [2021-06-05 16:35:43,544 INFO L78 Accepts]: Start accepts. Automaton has 11492 states and 43914 transitions. Word has length 28 [2021-06-05 16:35:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:43,544 INFO L482 AbstractCegarLoop]: Abstraction has 11492 states and 43914 transitions. [2021-06-05 16:35:43,544 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 16:35:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 11492 states and 43914 transitions. [2021-06-05 16:35:43,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:43,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:43,560 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 16:35:43,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5829 [2021-06-05 16:35:43,761 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:43,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1780893827, now seen corresponding path program 97 times [2021-06-05 16:35:43,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:43,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699251746] [2021-06-05 16:35:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:43,802 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 16:35:43,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:43,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699251746] [2021-06-05 16:35:43,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699251746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:43,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831315312] [2021-06-05 16:35:43,803 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 16:35:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:43,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:43,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:43,914 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 16:35:43,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831315312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:43,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:43,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:35:43,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156576380] [2021-06-05 16:35:43,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:43,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:43,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:43,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:43,915 INFO L87 Difference]: Start difference. First operand 11492 states and 43914 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 16:35:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:45,152 INFO L93 Difference]: Finished difference Result 20234 states and 72057 transitions. [2021-06-05 16:35:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:35:45,153 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 16:35:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:45,193 INFO L225 Difference]: With dead ends: 20234 [2021-06-05 16:35:45,193 INFO L226 Difference]: Without dead ends: 20222 [2021-06-05 16:35:45,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 723.6ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:35:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20222 states. [2021-06-05 16:35:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20222 to 11374. [2021-06-05 16:35:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11374 states, 11373 states have (on average 3.8259913831003254) internal successors, (43513), 11373 states have internal predecessors, (43513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11374 states to 11374 states and 43513 transitions. [2021-06-05 16:35:45,496 INFO L78 Accepts]: Start accepts. Automaton has 11374 states and 43513 transitions. Word has length 28 [2021-06-05 16:35:45,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:45,496 INFO L482 AbstractCegarLoop]: Abstraction has 11374 states and 43513 transitions. [2021-06-05 16:35:45,496 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 16:35:45,496 INFO L276 IsEmpty]: Start isEmpty. Operand 11374 states and 43513 transitions. [2021-06-05 16:35:45,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:45,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:45,514 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 16:35:45,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5830,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:45,721 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:45,721 INFO L82 PathProgramCache]: Analyzing trace with hash 513436649, now seen corresponding path program 98 times [2021-06-05 16:35:45,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:45,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979093332] [2021-06-05 16:35:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:45,764 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 16:35:45,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:45,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979093332] [2021-06-05 16:35:45,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979093332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:45,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205803339] [2021-06-05 16:35:45,764 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 16:35:45,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:45,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:45,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:45,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:45,865 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 16:35:45,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205803339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:45,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:45,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:35:45,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776767858] [2021-06-05 16:35:45,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:45,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:45,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:45,866 INFO L87 Difference]: Start difference. First operand 11374 states and 43513 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 16:35:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:47,026 INFO L93 Difference]: Finished difference Result 19474 states and 69973 transitions. [2021-06-05 16:35:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:35:47,026 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 16:35:47,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:47,064 INFO L225 Difference]: With dead ends: 19474 [2021-06-05 16:35:47,064 INFO L226 Difference]: Without dead ends: 19438 [2021-06-05 16:35:47,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:35:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19438 states. [2021-06-05 16:35:47,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19438 to 11398. [2021-06-05 16:35:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11398 states, 11397 states have (on average 3.8249539352461173) internal successors, (43593), 11397 states have internal predecessors, (43593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11398 states to 11398 states and 43593 transitions. [2021-06-05 16:35:47,340 INFO L78 Accepts]: Start accepts. Automaton has 11398 states and 43593 transitions. Word has length 28 [2021-06-05 16:35:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:47,340 INFO L482 AbstractCegarLoop]: Abstraction has 11398 states and 43593 transitions. [2021-06-05 16:35:47,340 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 16:35:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 11398 states and 43593 transitions. [2021-06-05 16:35:47,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:47,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:47,357 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 16:35:47,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5831,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:47,557 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:47,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1989550525, now seen corresponding path program 99 times [2021-06-05 16:35:47,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:47,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175199416] [2021-06-05 16:35:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:47,596 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 16:35:47,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:47,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175199416] [2021-06-05 16:35:47,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175199416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:47,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201121022] [2021-06-05 16:35:47,597 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 16:35:47,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:35:47,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:47,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:47,716 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 16:35:47,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201121022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:47,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:47,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:35:47,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293149792] [2021-06-05 16:35:47,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:47,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:47,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:47,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:47,717 INFO L87 Difference]: Start difference. First operand 11398 states and 43593 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 16:35:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:49,041 INFO L93 Difference]: Finished difference Result 28545 states and 102022 transitions. [2021-06-05 16:35:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 16:35:49,041 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 16:35:49,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:49,106 INFO L225 Difference]: With dead ends: 28545 [2021-06-05 16:35:49,106 INFO L226 Difference]: Without dead ends: 28545 [2021-06-05 16:35:49,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 788.4ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 16:35:49,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28545 states. [2021-06-05 16:35:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28545 to 11732. [2021-06-05 16:35:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11732 states, 11731 states have (on average 3.8504816298695763) internal successors, (45170), 11731 states have internal predecessors, (45170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11732 states to 11732 states and 45170 transitions. [2021-06-05 16:35:49,507 INFO L78 Accepts]: Start accepts. Automaton has 11732 states and 45170 transitions. Word has length 28 [2021-06-05 16:35:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:49,507 INFO L482 AbstractCegarLoop]: Abstraction has 11732 states and 45170 transitions. [2021-06-05 16:35:49,507 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 16:35:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 11732 states and 45170 transitions. [2021-06-05 16:35:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:49,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:49,525 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 16:35:49,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5832,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:49,726 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:49,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:49,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1738464691, now seen corresponding path program 100 times [2021-06-05 16:35:49,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:49,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300547796] [2021-06-05 16:35:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:49,758 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 16:35:49,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:49,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300547796] [2021-06-05 16:35:49,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300547796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:49,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649994041] [2021-06-05 16:35:49,758 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 16:35:49,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:49,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:49,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:49,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:49,876 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 16:35:49,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649994041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:49,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:49,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:35:49,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232404511] [2021-06-05 16:35:49,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:49,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:49,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:49,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:49,877 INFO L87 Difference]: Start difference. First operand 11732 states and 45170 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 16:35:51,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:51,085 INFO L93 Difference]: Finished difference Result 27990 states and 100748 transitions. [2021-06-05 16:35:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 16:35:51,085 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 16:35:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:51,143 INFO L225 Difference]: With dead ends: 27990 [2021-06-05 16:35:51,144 INFO L226 Difference]: Without dead ends: 27990 [2021-06-05 16:35:51,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 717.9ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:35:51,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27990 states. [2021-06-05 16:35:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27990 to 11622. [2021-06-05 16:35:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11622 states, 11621 states have (on average 3.83779364942776) internal successors, (44599), 11621 states have internal predecessors, (44599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11622 states to 11622 states and 44599 transitions. [2021-06-05 16:35:51,540 INFO L78 Accepts]: Start accepts. Automaton has 11622 states and 44599 transitions. Word has length 28 [2021-06-05 16:35:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:51,540 INFO L482 AbstractCegarLoop]: Abstraction has 11622 states and 44599 transitions. [2021-06-05 16:35:51,540 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 16:35:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 11622 states and 44599 transitions. [2021-06-05 16:35:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:51,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:51,557 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 16:35:51,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5833,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:51,758 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:51,759 INFO L82 PathProgramCache]: Analyzing trace with hash 495642803, now seen corresponding path program 101 times [2021-06-05 16:35:51,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:51,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345835805] [2021-06-05 16:35:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:51,802 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 16:35:51,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:51,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345835805] [2021-06-05 16:35:51,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345835805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:51,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980515805] [2021-06-05 16:35:51,802 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 16:35:51,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:35:51,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:51,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:51,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:51,922 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 16:35:51,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980515805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:51,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:51,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:35:51,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613138364] [2021-06-05 16:35:51,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:51,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:51,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:51,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:51,923 INFO L87 Difference]: Start difference. First operand 11622 states and 44599 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 16:35:52,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:52,771 INFO L93 Difference]: Finished difference Result 22146 states and 80034 transitions. [2021-06-05 16:35:52,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:35:52,772 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 16:35:52,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:52,815 INFO L225 Difference]: With dead ends: 22146 [2021-06-05 16:35:52,815 INFO L226 Difference]: Without dead ends: 22146 [2021-06-05 16:35:52,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:35:52,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22146 states. [2021-06-05 16:35:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22146 to 11631. [2021-06-05 16:35:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11631 states, 11630 states have (on average 3.8368013757523647) internal successors, (44622), 11630 states have internal predecessors, (44622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11631 states to 11631 states and 44622 transitions. [2021-06-05 16:35:53,118 INFO L78 Accepts]: Start accepts. Automaton has 11631 states and 44622 transitions. Word has length 28 [2021-06-05 16:35:53,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:53,119 INFO L482 AbstractCegarLoop]: Abstraction has 11631 states and 44622 transitions. [2021-06-05 16:35:53,119 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 16:35:53,119 INFO L276 IsEmpty]: Start isEmpty. Operand 11631 states and 44622 transitions. [2021-06-05 16:35:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:53,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:53,135 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 16:35:53,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5834 [2021-06-05 16:35:53,336 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash -179079075, now seen corresponding path program 102 times [2021-06-05 16:35:53,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:53,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626158057] [2021-06-05 16:35:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:53,369 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 16:35:53,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:53,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626158057] [2021-06-05 16:35:53,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626158057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:53,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369836139] [2021-06-05 16:35:53,369 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 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 16:35:53,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:35:53,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:53,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:53,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:53,477 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 16:35:53,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369836139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:53,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:53,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:35:53,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592439226] [2021-06-05 16:35:53,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:35:53,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:53,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:35:53,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:35:53,478 INFO L87 Difference]: Start difference. First operand 11631 states and 44622 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 16:35:54,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:54,246 INFO L93 Difference]: Finished difference Result 20505 states and 74794 transitions. [2021-06-05 16:35:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:35:54,246 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 16:35:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:54,284 INFO L225 Difference]: With dead ends: 20505 [2021-06-05 16:35:54,284 INFO L226 Difference]: Without dead ends: 20505 [2021-06-05 16:35:54,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:35:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20505 states. [2021-06-05 16:35:54,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20505 to 11643. [2021-06-05 16:35:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11643 states, 11642 states have (on average 3.836110633911699) internal successors, (44660), 11642 states have internal predecessors, (44660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11643 states to 11643 states and 44660 transitions. [2021-06-05 16:35:54,567 INFO L78 Accepts]: Start accepts. Automaton has 11643 states and 44660 transitions. Word has length 28 [2021-06-05 16:35:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:54,567 INFO L482 AbstractCegarLoop]: Abstraction has 11643 states and 44660 transitions. [2021-06-05 16:35:54,567 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 16:35:54,568 INFO L276 IsEmpty]: Start isEmpty. Operand 11643 states and 44660 transitions. [2021-06-05 16:35:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:54,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:54,585 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 16:35:54,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5835,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:54,785 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1474281101, now seen corresponding path program 103 times [2021-06-05 16:35:54,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:54,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343569428] [2021-06-05 16:35:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:54,818 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 16:35:54,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343569428] [2021-06-05 16:35:54,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343569428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615088978] [2021-06-05 16:35:54,818 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 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 16:35:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:54,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:54,935 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 16:35:54,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615088978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:54,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:54,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:35:54,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802018949] [2021-06-05 16:35:54,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:54,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:54,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:54,936 INFO L87 Difference]: Start difference. First operand 11643 states and 44660 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 16:35:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:55,981 INFO L93 Difference]: Finished difference Result 21288 states and 77031 transitions. [2021-06-05 16:35:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 16:35:55,982 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 16:35:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:56,021 INFO L225 Difference]: With dead ends: 21288 [2021-06-05 16:35:56,021 INFO L226 Difference]: Without dead ends: 21288 [2021-06-05 16:35:56,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 656.1ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 16:35:56,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21288 states. [2021-06-05 16:35:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21288 to 11751. [2021-06-05 16:35:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11751 states, 11750 states have (on average 3.829276595744681) internal successors, (44994), 11750 states have internal predecessors, (44994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11751 states to 11751 states and 44994 transitions. [2021-06-05 16:35:56,322 INFO L78 Accepts]: Start accepts. Automaton has 11751 states and 44994 transitions. Word has length 28 [2021-06-05 16:35:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:56,322 INFO L482 AbstractCegarLoop]: Abstraction has 11751 states and 44994 transitions. [2021-06-05 16:35:56,322 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 16:35:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 11751 states and 44994 transitions. [2021-06-05 16:35:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:56,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:56,341 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 16:35:56,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5836,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:56,541 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:56,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:56,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1177647041, now seen corresponding path program 104 times [2021-06-05 16:35:56,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:56,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839679971] [2021-06-05 16:35:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:56,638 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 16:35:56,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:56,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839679971] [2021-06-05 16:35:56,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839679971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:56,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025680341] [2021-06-05 16:35:56,639 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 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 16:35:56,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:56,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:56,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:56,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:56,751 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 16:35:56,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025680341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:56,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:56,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:35:56,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874754782] [2021-06-05 16:35:56,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:56,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:56,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:56,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:56,752 INFO L87 Difference]: Start difference. First operand 11751 states and 44994 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 16:35:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:57,652 INFO L93 Difference]: Finished difference Result 20669 states and 75327 transitions. [2021-06-05 16:35:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:35:57,652 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 16:35:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:57,693 INFO L225 Difference]: With dead ends: 20669 [2021-06-05 16:35:57,693 INFO L226 Difference]: Without dead ends: 20665 [2021-06-05 16:35:57,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:35:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20665 states. [2021-06-05 16:35:57,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20665 to 11677. [2021-06-05 16:35:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11677 states, 11676 states have (on average 3.833076396026036) internal successors, (44755), 11676 states have internal predecessors, (44755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11677 states to 11677 states and 44755 transitions. [2021-06-05 16:35:57,982 INFO L78 Accepts]: Start accepts. Automaton has 11677 states and 44755 transitions. Word has length 28 [2021-06-05 16:35:57,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:57,982 INFO L482 AbstractCegarLoop]: Abstraction has 11677 states and 44755 transitions. [2021-06-05 16:35:57,982 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 16:35:57,982 INFO L276 IsEmpty]: Start isEmpty. Operand 11677 states and 44755 transitions. [2021-06-05 16:35:57,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:57,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:57,999 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 16:35:58,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5837 [2021-06-05 16:35:58,199 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:58,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1027792075, now seen corresponding path program 105 times [2021-06-05 16:35:58,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:58,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977555808] [2021-06-05 16:35:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:58,240 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 16:35:58,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:58,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977555808] [2021-06-05 16:35:58,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977555808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:58,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328997245] [2021-06-05 16:35:58,241 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 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 16:35:58,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:35:58,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:58,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:35:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:58,350 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 16:35:58,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328997245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:58,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:58,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:35:58,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843839625] [2021-06-05 16:35:58,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:35:58,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:58,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:35:58,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:35:58,350 INFO L87 Difference]: Start difference. First operand 11677 states and 44755 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 16:35:59,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:59,399 INFO L93 Difference]: Finished difference Result 19974 states and 72092 transitions. [2021-06-05 16:35:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:35:59,400 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 16:35:59,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:59,438 INFO L225 Difference]: With dead ends: 19974 [2021-06-05 16:35:59,438 INFO L226 Difference]: Without dead ends: 19974 [2021-06-05 16:35:59,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 640.6ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:35:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19974 states. [2021-06-05 16:35:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19974 to 11904. [2021-06-05 16:35:59,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11904 states, 11903 states have (on average 3.835419642107032) internal successors, (45653), 11903 states have internal predecessors, (45653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11904 states to 11904 states and 45653 transitions. [2021-06-05 16:35:59,772 INFO L78 Accepts]: Start accepts. Automaton has 11904 states and 45653 transitions. Word has length 28 [2021-06-05 16:35:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:59,772 INFO L482 AbstractCegarLoop]: Abstraction has 11904 states and 45653 transitions. [2021-06-05 16:35:59,772 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 16:35:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 11904 states and 45653 transitions. [2021-06-05 16:35:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:35:59,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:59,793 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 16:35:59,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5838,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:59,993 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:59,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2086855541, now seen corresponding path program 106 times [2021-06-05 16:35:59,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:59,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80036078] [2021-06-05 16:35:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:00,031 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 16:36:00,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:00,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80036078] [2021-06-05 16:36:00,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80036078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:00,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770139395] [2021-06-05 16:36:00,032 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 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 16:36:00,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:00,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:00,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:00,135 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 16:36:00,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770139395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:00,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:00,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:36:00,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415517852] [2021-06-05 16:36:00,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:00,136 INFO L87 Difference]: Start difference. First operand 11904 states and 45653 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 16:36:01,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:01,042 INFO L93 Difference]: Finished difference Result 19505 states and 70801 transitions. [2021-06-05 16:36:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:36:01,042 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 16:36:01,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:01,080 INFO L225 Difference]: With dead ends: 19505 [2021-06-05 16:36:01,081 INFO L226 Difference]: Without dead ends: 19493 [2021-06-05 16:36:01,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 533.3ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:36:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19493 states. [2021-06-05 16:36:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19493 to 12006. [2021-06-05 16:36:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12006 states, 12005 states have (on average 3.829737609329446) internal successors, (45976), 12005 states have internal predecessors, (45976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12006 states to 12006 states and 45976 transitions. [2021-06-05 16:36:01,363 INFO L78 Accepts]: Start accepts. Automaton has 12006 states and 45976 transitions. Word has length 28 [2021-06-05 16:36:01,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:01,363 INFO L482 AbstractCegarLoop]: Abstraction has 12006 states and 45976 transitions. [2021-06-05 16:36:01,363 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 16:36:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 12006 states and 45976 transitions. [2021-06-05 16:36:01,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:01,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:01,381 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 16:36:01,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5839 [2021-06-05 16:36:01,581 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2013038777, now seen corresponding path program 77 times [2021-06-05 16:36:01,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:01,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835754155] [2021-06-05 16:36:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:01,621 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 16:36:01,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:01,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835754155] [2021-06-05 16:36:01,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835754155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:01,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482075841] [2021-06-05 16:36:01,622 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 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 16:36:01,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:36:01,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:01,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:01,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:01,703 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 16:36:01,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482075841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:01,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:01,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:36:01,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868662502] [2021-06-05 16:36:01,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:01,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:01,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:01,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:01,704 INFO L87 Difference]: Start difference. First operand 12006 states and 45976 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 16:36:02,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:02,197 INFO L93 Difference]: Finished difference Result 16927 states and 62911 transitions. [2021-06-05 16:36:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:36:02,198 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 16:36:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:02,230 INFO L225 Difference]: With dead ends: 16927 [2021-06-05 16:36:02,230 INFO L226 Difference]: Without dead ends: 16927 [2021-06-05 16:36:02,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:36:02,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16927 states. [2021-06-05 16:36:02,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16927 to 12078. [2021-06-05 16:36:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12078 states, 12077 states have (on average 3.8251221329800447) internal successors, (46196), 12077 states have internal predecessors, (46196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12078 states to 12078 states and 46196 transitions. [2021-06-05 16:36:02,473 INFO L78 Accepts]: Start accepts. Automaton has 12078 states and 46196 transitions. Word has length 28 [2021-06-05 16:36:02,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:02,474 INFO L482 AbstractCegarLoop]: Abstraction has 12078 states and 46196 transitions. [2021-06-05 16:36:02,474 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 16:36:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 12078 states and 46196 transitions. [2021-06-05 16:36:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:02,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:02,491 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 16:36:02,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5840,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:02,691 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:02,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:02,691 INFO L82 PathProgramCache]: Analyzing trace with hash -570762731, now seen corresponding path program 78 times [2021-06-05 16:36:02,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:02,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862412519] [2021-06-05 16:36:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:02,722 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 16:36:02,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:02,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862412519] [2021-06-05 16:36:02,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862412519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:02,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033554511] [2021-06-05 16:36:02,722 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 16:36:02,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:36:02,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:02,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:02,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:02,831 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 16:36:02,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033554511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:02,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:02,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:36:02,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923276289] [2021-06-05 16:36:02,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:02,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:02,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:02,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:02,832 INFO L87 Difference]: Start difference. First operand 12078 states and 46196 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 16:36:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:03,219 INFO L93 Difference]: Finished difference Result 15219 states and 56335 transitions. [2021-06-05 16:36:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:36:03,220 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 16:36:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:03,248 INFO L225 Difference]: With dead ends: 15219 [2021-06-05 16:36:03,248 INFO L226 Difference]: Without dead ends: 15168 [2021-06-05 16:36:03,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:36:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15168 states. [2021-06-05 16:36:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15168 to 11725. [2021-06-05 16:36:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11725 states, 11724 states have (on average 3.8169566700784716) internal successors, (44750), 11724 states have internal predecessors, (44750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11725 states to 11725 states and 44750 transitions. [2021-06-05 16:36:03,483 INFO L78 Accepts]: Start accepts. Automaton has 11725 states and 44750 transitions. Word has length 28 [2021-06-05 16:36:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:03,483 INFO L482 AbstractCegarLoop]: Abstraction has 11725 states and 44750 transitions. [2021-06-05 16:36:03,483 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 16:36:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 11725 states and 44750 transitions. [2021-06-05 16:36:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:03,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:03,503 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 16:36:03,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5841,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:03,703 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:03,703 INFO L82 PathProgramCache]: Analyzing trace with hash 242532185, now seen corresponding path program 79 times [2021-06-05 16:36:03,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:03,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862921165] [2021-06-05 16:36:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:03,736 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 16:36:03,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:03,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862921165] [2021-06-05 16:36:03,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862921165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:03,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147608383] [2021-06-05 16:36:03,737 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 16:36:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:03,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:03,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:03,820 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 16:36:03,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147608383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:03,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:03,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:36:03,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798120706] [2021-06-05 16:36:03,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:36:03,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:36:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:36:03,821 INFO L87 Difference]: Start difference. First operand 11725 states and 44750 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 16:36:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:04,307 INFO L93 Difference]: Finished difference Result 17575 states and 64328 transitions. [2021-06-05 16:36:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:36:04,308 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 16:36:04,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:04,341 INFO L225 Difference]: With dead ends: 17575 [2021-06-05 16:36:04,341 INFO L226 Difference]: Without dead ends: 17575 [2021-06-05 16:36:04,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:36:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17575 states. [2021-06-05 16:36:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17575 to 12033. [2021-06-05 16:36:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12033 states, 12032 states have (on average 3.8006981382978724) internal successors, (45730), 12032 states have internal predecessors, (45730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12033 states to 12033 states and 45730 transitions. [2021-06-05 16:36:04,636 INFO L78 Accepts]: Start accepts. Automaton has 12033 states and 45730 transitions. Word has length 28 [2021-06-05 16:36:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:04,636 INFO L482 AbstractCegarLoop]: Abstraction has 12033 states and 45730 transitions. [2021-06-05 16:36:04,636 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 16:36:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 12033 states and 45730 transitions. [2021-06-05 16:36:04,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:04,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:04,653 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 16:36:04,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5842,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:04,854 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:04,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:04,854 INFO L82 PathProgramCache]: Analyzing trace with hash 197711043, now seen corresponding path program 80 times [2021-06-05 16:36:04,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:04,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184248384] [2021-06-05 16:36:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:04,886 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 16:36:04,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:04,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184248384] [2021-06-05 16:36:04,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184248384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:04,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825145151] [2021-06-05 16:36:04,886 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 16:36:04,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:04,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:04,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:04,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:04,961 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 16:36:04,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825145151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:04,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:04,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:36:04,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43879446] [2021-06-05 16:36:04,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:36:04,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:04,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:36:04,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:36:04,962 INFO L87 Difference]: Start difference. First operand 12033 states and 45730 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 16:36:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:05,375 INFO L93 Difference]: Finished difference Result 17039 states and 62930 transitions. [2021-06-05 16:36:05,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:36:05,377 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 16:36:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:05,411 INFO L225 Difference]: With dead ends: 17039 [2021-06-05 16:36:05,411 INFO L226 Difference]: Without dead ends: 17031 [2021-06-05 16:36:05,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:36:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17031 states. [2021-06-05 16:36:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17031 to 11973. [2021-06-05 16:36:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11973 states, 11972 states have (on average 3.8028733711994653) internal successors, (45528), 11972 states have internal predecessors, (45528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11973 states to 11973 states and 45528 transitions. [2021-06-05 16:36:05,674 INFO L78 Accepts]: Start accepts. Automaton has 11973 states and 45528 transitions. Word has length 28 [2021-06-05 16:36:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:05,674 INFO L482 AbstractCegarLoop]: Abstraction has 11973 states and 45528 transitions. [2021-06-05 16:36:05,674 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 16:36:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 11973 states and 45528 transitions. [2021-06-05 16:36:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:05,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:05,691 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 16:36:05,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5843,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:05,891 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:05,891 INFO L82 PathProgramCache]: Analyzing trace with hash 795047701, now seen corresponding path program 81 times [2021-06-05 16:36:05,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:05,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289357868] [2021-06-05 16:36:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:05,928 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 16:36:05,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:05,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289357868] [2021-06-05 16:36:05,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289357868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:05,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302668704] [2021-06-05 16:36:05,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:36:05,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:36:05,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:05,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:06,004 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 16:36:06,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302668704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:06,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:06,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:36:06,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818679085] [2021-06-05 16:36:06,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:06,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:06,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:06,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:06,005 INFO L87 Difference]: Start difference. First operand 11973 states and 45528 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 16:36:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:06,446 INFO L93 Difference]: Finished difference Result 16939 states and 62644 transitions. [2021-06-05 16:36:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:36:06,446 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 16:36:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:06,478 INFO L225 Difference]: With dead ends: 16939 [2021-06-05 16:36:06,479 INFO L226 Difference]: Without dead ends: 16927 [2021-06-05 16:36:06,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:36:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16927 states. [2021-06-05 16:36:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16927 to 11945. [2021-06-05 16:36:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11945 states, 11944 states have (on average 3.8044206296048224) internal successors, (45440), 11944 states have internal predecessors, (45440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11945 states to 11945 states and 45440 transitions. [2021-06-05 16:36:06,813 INFO L78 Accepts]: Start accepts. Automaton has 11945 states and 45440 transitions. Word has length 28 [2021-06-05 16:36:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:06,813 INFO L482 AbstractCegarLoop]: Abstraction has 11945 states and 45440 transitions. [2021-06-05 16:36:06,813 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 16:36:06,813 INFO L276 IsEmpty]: Start isEmpty. Operand 11945 states and 45440 transitions. [2021-06-05 16:36:06,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:06,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:06,831 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 16:36:07,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5844,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:07,031 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:07,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:07,032 INFO L82 PathProgramCache]: Analyzing trace with hash 139638229, now seen corresponding path program 82 times [2021-06-05 16:36:07,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:07,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284454405] [2021-06-05 16:36:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:07,067 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 16:36:07,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:07,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284454405] [2021-06-05 16:36:07,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284454405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:07,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009556523] [2021-06-05 16:36:07,068 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 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 16:36:07,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:07,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:07,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:07,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:07,190 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 16:36:07,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009556523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:07,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:07,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:36:07,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835800240] [2021-06-05 16:36:07,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:36:07,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:07,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:36:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:36:07,191 INFO L87 Difference]: Start difference. First operand 11945 states and 45440 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 16:36:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:08,217 INFO L93 Difference]: Finished difference Result 23123 states and 82678 transitions. [2021-06-05 16:36:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:36:08,218 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 16:36:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:08,264 INFO L225 Difference]: With dead ends: 23123 [2021-06-05 16:36:08,264 INFO L226 Difference]: Without dead ends: 23123 [2021-06-05 16:36:08,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:36:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23123 states. [2021-06-05 16:36:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23123 to 11925. [2021-06-05 16:36:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11925 states, 11924 states have (on average 3.8030862126803084) internal successors, (45348), 11924 states have internal predecessors, (45348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11925 states to 11925 states and 45348 transitions. [2021-06-05 16:36:08,559 INFO L78 Accepts]: Start accepts. Automaton has 11925 states and 45348 transitions. Word has length 28 [2021-06-05 16:36:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:08,559 INFO L482 AbstractCegarLoop]: Abstraction has 11925 states and 45348 transitions. [2021-06-05 16:36:08,559 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 16:36:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 11925 states and 45348 transitions. [2021-06-05 16:36:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:08,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:08,577 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 16:36:08,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5845,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:08,781 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash 666410137, now seen corresponding path program 107 times [2021-06-05 16:36:08,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:08,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947395817] [2021-06-05 16:36:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:08,806 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 16:36:08,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:08,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947395817] [2021-06-05 16:36:08,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947395817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:08,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446896024] [2021-06-05 16:36:08,807 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 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 16:36:08,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:36:08,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:08,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:08,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:08,910 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 16:36:08,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446896024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:08,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:08,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:36:08,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583217878] [2021-06-05 16:36:08,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:08,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:08,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:08,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:08,911 INFO L87 Difference]: Start difference. First operand 11925 states and 45348 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 16:36:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:09,628 INFO L93 Difference]: Finished difference Result 18992 states and 68940 transitions. [2021-06-05 16:36:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:36:09,629 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 16:36:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:09,667 INFO L225 Difference]: With dead ends: 18992 [2021-06-05 16:36:09,667 INFO L226 Difference]: Without dead ends: 18979 [2021-06-05 16:36:09,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 361.2ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:36:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18979 states. [2021-06-05 16:36:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18979 to 13439. [2021-06-05 16:36:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13439 states, 13438 states have (on average 3.8746093168626285) internal successors, (52067), 13438 states have internal predecessors, (52067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13439 states to 13439 states and 52067 transitions. [2021-06-05 16:36:09,971 INFO L78 Accepts]: Start accepts. Automaton has 13439 states and 52067 transitions. Word has length 28 [2021-06-05 16:36:09,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:09,971 INFO L482 AbstractCegarLoop]: Abstraction has 13439 states and 52067 transitions. [2021-06-05 16:36:09,971 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 16:36:09,971 INFO L276 IsEmpty]: Start isEmpty. Operand 13439 states and 52067 transitions. [2021-06-05 16:36:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:10,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:10,065 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 16:36:10,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5846 [2021-06-05 16:36:10,273 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:10,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1338822919, now seen corresponding path program 108 times [2021-06-05 16:36:10,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:10,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811776431] [2021-06-05 16:36:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:10,298 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 16:36:10,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:10,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811776431] [2021-06-05 16:36:10,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811776431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:10,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13349917] [2021-06-05 16:36:10,298 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 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 16:36:10,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:36:10,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:10,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:10,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:10,408 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 16:36:10,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13349917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:10,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:10,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:36:10,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125632718] [2021-06-05 16:36:10,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:10,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:10,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:10,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:10,408 INFO L87 Difference]: Start difference. First operand 13439 states and 52067 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 16:36:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:11,137 INFO L93 Difference]: Finished difference Result 19144 states and 69363 transitions. [2021-06-05 16:36:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:36:11,137 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 16:36:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:11,173 INFO L225 Difference]: With dead ends: 19144 [2021-06-05 16:36:11,174 INFO L226 Difference]: Without dead ends: 19129 [2021-06-05 16:36:11,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:36:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19129 states. [2021-06-05 16:36:11,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19129 to 13406. [2021-06-05 16:36:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13406 states, 13405 states have (on average 3.873330846698993) internal successors, (51922), 13405 states have internal predecessors, (51922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13406 states to 13406 states and 51922 transitions. [2021-06-05 16:36:11,498 INFO L78 Accepts]: Start accepts. Automaton has 13406 states and 51922 transitions. Word has length 28 [2021-06-05 16:36:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:11,498 INFO L482 AbstractCegarLoop]: Abstraction has 13406 states and 51922 transitions. [2021-06-05 16:36:11,498 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 16:36:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 13406 states and 51922 transitions. [2021-06-05 16:36:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:11,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:11,518 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 16:36:11,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5847,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:11,719 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:11,719 INFO L82 PathProgramCache]: Analyzing trace with hash -476515903, now seen corresponding path program 109 times [2021-06-05 16:36:11,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:11,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685051927] [2021-06-05 16:36:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:11,744 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 16:36:11,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:11,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685051927] [2021-06-05 16:36:11,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685051927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:11,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913448334] [2021-06-05 16:36:11,744 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 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 16:36:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:11,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:11,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:11,837 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 16:36:11,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913448334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:11,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:11,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:36:11,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104222724] [2021-06-05 16:36:11,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:11,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:11,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:11,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:11,838 INFO L87 Difference]: Start difference. First operand 13406 states and 51922 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 16:36:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:12,456 INFO L93 Difference]: Finished difference Result 21469 states and 77902 transitions. [2021-06-05 16:36:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:36:12,457 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 16:36:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:12,498 INFO L225 Difference]: With dead ends: 21469 [2021-06-05 16:36:12,498 INFO L226 Difference]: Without dead ends: 21456 [2021-06-05 16:36:12,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:36:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21456 states. [2021-06-05 16:36:12,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21456 to 13488. [2021-06-05 16:36:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13488 states, 13487 states have (on average 3.879068732853859) internal successors, (52317), 13487 states have internal predecessors, (52317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13488 states to 13488 states and 52317 transitions. [2021-06-05 16:36:12,837 INFO L78 Accepts]: Start accepts. Automaton has 13488 states and 52317 transitions. Word has length 28 [2021-06-05 16:36:12,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:12,837 INFO L482 AbstractCegarLoop]: Abstraction has 13488 states and 52317 transitions. [2021-06-05 16:36:12,837 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 16:36:12,838 INFO L276 IsEmpty]: Start isEmpty. Operand 13488 states and 52317 transitions. [2021-06-05 16:36:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:12,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:12,860 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 16:36:13,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5848,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:13,061 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:13,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1159260233, now seen corresponding path program 110 times [2021-06-05 16:36:13,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:13,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011579252] [2021-06-05 16:36:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:13,089 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 16:36:13,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:13,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011579252] [2021-06-05 16:36:13,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011579252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:13,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829991374] [2021-06-05 16:36:13,090 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 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 16:36:13,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:13,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:13,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:13,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:13,191 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 16:36:13,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829991374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:13,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:13,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:36:13,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246486508] [2021-06-05 16:36:13,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:13,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:13,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:13,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:13,192 INFO L87 Difference]: Start difference. First operand 13488 states and 52317 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 16:36:13,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:13,897 INFO L93 Difference]: Finished difference Result 22765 states and 81941 transitions. [2021-06-05 16:36:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:36:13,897 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 16:36:13,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:13,940 INFO L225 Difference]: With dead ends: 22765 [2021-06-05 16:36:13,940 INFO L226 Difference]: Without dead ends: 22765 [2021-06-05 16:36:13,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:36:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22765 states. [2021-06-05 16:36:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22765 to 13512. [2021-06-05 16:36:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13512 states, 13511 states have (on average 3.8755828584116645) internal successors, (52363), 13511 states have internal predecessors, (52363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13512 states to 13512 states and 52363 transitions. [2021-06-05 16:36:14,281 INFO L78 Accepts]: Start accepts. Automaton has 13512 states and 52363 transitions. Word has length 28 [2021-06-05 16:36:14,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:14,281 INFO L482 AbstractCegarLoop]: Abstraction has 13512 states and 52363 transitions. [2021-06-05 16:36:14,281 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 16:36:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 13512 states and 52363 transitions. [2021-06-05 16:36:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:14,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:14,304 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 16:36:14,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5849 [2021-06-05 16:36:14,504 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:14,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1083104517, now seen corresponding path program 83 times [2021-06-05 16:36:14,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:14,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836072752] [2021-06-05 16:36:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:14,536 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 16:36:14,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:14,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836072752] [2021-06-05 16:36:14,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836072752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:14,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004826327] [2021-06-05 16:36:14,537 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 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 16:36:14,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:36:14,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:14,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:14,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:14,638 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 16:36:14,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004826327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:14,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:14,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:36:14,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259009102] [2021-06-05 16:36:14,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:14,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:14,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:14,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:14,639 INFO L87 Difference]: Start difference. First operand 13512 states and 52363 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 16:36:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:15,532 INFO L93 Difference]: Finished difference Result 23563 states and 86937 transitions. [2021-06-05 16:36:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:36:15,532 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 16:36:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:15,577 INFO L225 Difference]: With dead ends: 23563 [2021-06-05 16:36:15,577 INFO L226 Difference]: Without dead ends: 23559 [2021-06-05 16:36:15,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 505.6ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:36:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23559 states. [2021-06-05 16:36:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23559 to 13808. [2021-06-05 16:36:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13808 states, 13807 states have (on average 3.86390961106685) internal successors, (53349), 13807 states have internal predecessors, (53349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13808 states to 13808 states and 53349 transitions. [2021-06-05 16:36:15,927 INFO L78 Accepts]: Start accepts. Automaton has 13808 states and 53349 transitions. Word has length 28 [2021-06-05 16:36:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:15,927 INFO L482 AbstractCegarLoop]: Abstraction has 13808 states and 53349 transitions. [2021-06-05 16:36:15,928 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 16:36:15,928 INFO L276 IsEmpty]: Start isEmpty. Operand 13808 states and 53349 transitions. [2021-06-05 16:36:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:15,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:15,949 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 16:36:16,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5850 [2021-06-05 16:36:16,149 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -217720579, now seen corresponding path program 111 times [2021-06-05 16:36:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:16,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318337840] [2021-06-05 16:36:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:16,178 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 16:36:16,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:16,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318337840] [2021-06-05 16:36:16,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318337840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:16,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679904906] [2021-06-05 16:36:16,179 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 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 16:36:16,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:36:16,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:16,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:16,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:16,347 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 16:36:16,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679904906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:16,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:16,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:36:16,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999091143] [2021-06-05 16:36:16,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:16,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:16,348 INFO L87 Difference]: Start difference. First operand 13808 states and 53349 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 16:36:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:16,944 INFO L93 Difference]: Finished difference Result 20031 states and 73742 transitions. [2021-06-05 16:36:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:36:16,945 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 16:36:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:16,983 INFO L225 Difference]: With dead ends: 20031 [2021-06-05 16:36:16,983 INFO L226 Difference]: Without dead ends: 20008 [2021-06-05 16:36:16,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 316.0ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:36:17,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20008 states. [2021-06-05 16:36:17,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20008 to 13828. [2021-06-05 16:36:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13828 states, 13827 states have (on average 3.8711217183770885) internal successors, (53526), 13827 states have internal predecessors, (53526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13828 states to 13828 states and 53526 transitions. [2021-06-05 16:36:17,293 INFO L78 Accepts]: Start accepts. Automaton has 13828 states and 53526 transitions. Word has length 28 [2021-06-05 16:36:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:17,293 INFO L482 AbstractCegarLoop]: Abstraction has 13828 states and 53526 transitions. [2021-06-05 16:36:17,293 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 16:36:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 13828 states and 53526 transitions. [2021-06-05 16:36:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:17,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:17,313 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 16:36:17,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5851,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:17,514 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:17,514 INFO L82 PathProgramCache]: Analyzing trace with hash -900464909, now seen corresponding path program 112 times [2021-06-05 16:36:17,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:17,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723641831] [2021-06-05 16:36:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:17,543 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 16:36:17,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:17,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723641831] [2021-06-05 16:36:17,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723641831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:17,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253998386] [2021-06-05 16:36:17,543 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 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 16:36:17,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:17,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:17,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:17,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:17,633 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 16:36:17,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253998386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:17,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:17,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:36:17,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816252363] [2021-06-05 16:36:17,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:17,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:17,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:17,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:17,634 INFO L87 Difference]: Start difference. First operand 13828 states and 53526 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 16:36:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:18,325 INFO L93 Difference]: Finished difference Result 19483 states and 70764 transitions. [2021-06-05 16:36:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:36:18,326 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 16:36:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:18,364 INFO L225 Difference]: With dead ends: 19483 [2021-06-05 16:36:18,364 INFO L226 Difference]: Without dead ends: 19483 [2021-06-05 16:36:18,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 388.0ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:36:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19483 states. [2021-06-05 16:36:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19483 to 13783. [2021-06-05 16:36:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13783 states, 13782 states have (on average 3.8633725148744738) internal successors, (53245), 13782 states have internal predecessors, (53245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:18,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13783 states to 13783 states and 53245 transitions. [2021-06-05 16:36:18,682 INFO L78 Accepts]: Start accepts. Automaton has 13783 states and 53245 transitions. Word has length 28 [2021-06-05 16:36:18,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:18,682 INFO L482 AbstractCegarLoop]: Abstraction has 13783 states and 53245 transitions. [2021-06-05 16:36:18,682 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 16:36:18,682 INFO L276 IsEmpty]: Start isEmpty. Operand 13783 states and 53245 transitions. [2021-06-05 16:36:18,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:18,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:18,702 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 16:36:18,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5852,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:18,916 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:18,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1220583373, now seen corresponding path program 113 times [2021-06-05 16:36:18,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:18,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501938103] [2021-06-05 16:36:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:18,945 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 16:36:18,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:18,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501938103] [2021-06-05 16:36:18,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501938103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:18,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673596662] [2021-06-05 16:36:18,946 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 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 16:36:18,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:36:18,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:18,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:18,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:19,037 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 16:36:19,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673596662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:19,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:19,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:36:19,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836614267] [2021-06-05 16:36:19,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:19,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:19,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:19,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:19,038 INFO L87 Difference]: Start difference. First operand 13783 states and 53245 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 16:36:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:19,713 INFO L93 Difference]: Finished difference Result 20772 states and 75881 transitions. [2021-06-05 16:36:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:36:19,713 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 16:36:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:19,753 INFO L225 Difference]: With dead ends: 20772 [2021-06-05 16:36:19,753 INFO L226 Difference]: Without dead ends: 20772 [2021-06-05 16:36:19,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:36:19,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20772 states. [2021-06-05 16:36:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20772 to 14496. [2021-06-05 16:36:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14496 states, 14495 states have (on average 3.84932735426009) internal successors, (55796), 14495 states have internal predecessors, (55796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14496 states to 14496 states and 55796 transitions. [2021-06-05 16:36:20,068 INFO L78 Accepts]: Start accepts. Automaton has 14496 states and 55796 transitions. Word has length 28 [2021-06-05 16:36:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:20,068 INFO L482 AbstractCegarLoop]: Abstraction has 14496 states and 55796 transitions. [2021-06-05 16:36:20,068 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 16:36:20,068 INFO L276 IsEmpty]: Start isEmpty. Operand 14496 states and 55796 transitions. [2021-06-05 16:36:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:20,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:20,090 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 16:36:20,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5853 [2021-06-05 16:36:20,290 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:20,290 INFO L82 PathProgramCache]: Analyzing trace with hash -331180409, now seen corresponding path program 114 times [2021-06-05 16:36:20,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:20,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143285963] [2021-06-05 16:36:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:20,323 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 16:36:20,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:20,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143285963] [2021-06-05 16:36:20,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143285963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:20,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782494187] [2021-06-05 16:36:20,324 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 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 16:36:20,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:36:20,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:20,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:20,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:20,430 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 16:36:20,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782494187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:20,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:20,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:36:20,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327634476] [2021-06-05 16:36:20,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:20,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:20,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:20,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:20,431 INFO L87 Difference]: Start difference. First operand 14496 states and 55796 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 16:36:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:21,257 INFO L93 Difference]: Finished difference Result 23301 states and 83849 transitions. [2021-06-05 16:36:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:36:21,257 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 16:36:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:21,303 INFO L225 Difference]: With dead ends: 23301 [2021-06-05 16:36:21,303 INFO L226 Difference]: Without dead ends: 23301 [2021-06-05 16:36:21,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 452.0ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:36:21,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23301 states. [2021-06-05 16:36:21,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23301 to 14726. [2021-06-05 16:36:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14726 states, 14725 states have (on average 3.8604414261460103) internal successors, (56845), 14725 states have internal predecessors, (56845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14726 states to 14726 states and 56845 transitions. [2021-06-05 16:36:21,625 INFO L78 Accepts]: Start accepts. Automaton has 14726 states and 56845 transitions. Word has length 28 [2021-06-05 16:36:21,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:21,625 INFO L482 AbstractCegarLoop]: Abstraction has 14726 states and 56845 transitions. [2021-06-05 16:36:21,625 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 16:36:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 14726 states and 56845 transitions. [2021-06-05 16:36:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:21,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:21,647 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 16:36:21,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5854,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:21,847 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:21,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1653713447, now seen corresponding path program 84 times [2021-06-05 16:36:21,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:21,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404736290] [2021-06-05 16:36:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:21,880 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 16:36:21,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:21,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404736290] [2021-06-05 16:36:21,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404736290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:21,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045411452] [2021-06-05 16:36:21,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:36:21,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:36:21,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:21,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:21,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:21,999 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 16:36:21,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045411452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:21,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:21,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:36:22,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929008899] [2021-06-05 16:36:22,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:22,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:22,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:22,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:22,000 INFO L87 Difference]: Start difference. First operand 14726 states and 56845 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 16:36:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:23,454 INFO L93 Difference]: Finished difference Result 41437 states and 148960 transitions. [2021-06-05 16:36:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:36:23,454 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 16:36:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:23,545 INFO L225 Difference]: With dead ends: 41437 [2021-06-05 16:36:23,546 INFO L226 Difference]: Without dead ends: 41437 [2021-06-05 16:36:23,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 853.2ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:36:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41437 states. [2021-06-05 16:36:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41437 to 16084. [2021-06-05 16:36:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16084 states, 16083 states have (on average 3.9069825281352983) internal successors, (62836), 16083 states have internal predecessors, (62836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16084 states to 16084 states and 62836 transitions. [2021-06-05 16:36:24,108 INFO L78 Accepts]: Start accepts. Automaton has 16084 states and 62836 transitions. Word has length 28 [2021-06-05 16:36:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:24,108 INFO L482 AbstractCegarLoop]: Abstraction has 16084 states and 62836 transitions. [2021-06-05 16:36:24,108 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 16:36:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 16084 states and 62836 transitions. [2021-06-05 16:36:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:24,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:24,132 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 16:36:24,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5855,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:24,332 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1086761367, now seen corresponding path program 85 times [2021-06-05 16:36:24,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:24,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659138126] [2021-06-05 16:36:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:24,364 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 16:36:24,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:24,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659138126] [2021-06-05 16:36:24,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659138126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:24,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106690801] [2021-06-05 16:36:24,364 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 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 16:36:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:24,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:24,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:24,483 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 16:36:24,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106690801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:24,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:24,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:36:24,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884439683] [2021-06-05 16:36:24,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:24,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:24,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:24,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:24,484 INFO L87 Difference]: Start difference. First operand 16084 states and 62836 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 16:36:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:26,009 INFO L93 Difference]: Finished difference Result 40385 states and 146224 transitions. [2021-06-05 16:36:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:36:26,009 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 16:36:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:26,108 INFO L225 Difference]: With dead ends: 40385 [2021-06-05 16:36:26,108 INFO L226 Difference]: Without dead ends: 40385 [2021-06-05 16:36:26,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 935.1ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:36:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40385 states. [2021-06-05 16:36:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40385 to 16052. [2021-06-05 16:36:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16052 states, 16051 states have (on average 3.9033082050962555) internal successors, (62652), 16051 states have internal predecessors, (62652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16052 states to 16052 states and 62652 transitions. [2021-06-05 16:36:26,684 INFO L78 Accepts]: Start accepts. Automaton has 16052 states and 62652 transitions. Word has length 28 [2021-06-05 16:36:26,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:26,684 INFO L482 AbstractCegarLoop]: Abstraction has 16052 states and 62652 transitions. [2021-06-05 16:36:26,684 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 16:36:26,684 INFO L276 IsEmpty]: Start isEmpty. Operand 16052 states and 62652 transitions. [2021-06-05 16:36:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:26,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:26,707 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 16:36:26,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5856 [2021-06-05 16:36:26,907 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:26,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1368987715, now seen corresponding path program 115 times [2021-06-05 16:36:26,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:26,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224970819] [2021-06-05 16:36:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:26,939 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 16:36:26,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:26,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224970819] [2021-06-05 16:36:26,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224970819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:26,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059807434] [2021-06-05 16:36:26,939 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 16:36:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:26,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:27,010 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 16:36:27,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059807434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:27,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:27,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:36:27,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49843685] [2021-06-05 16:36:27,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:36:27,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:27,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:36:27,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:36:27,011 INFO L87 Difference]: Start difference. First operand 16052 states and 62652 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 16:36:27,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:27,268 INFO L93 Difference]: Finished difference Result 24998 states and 96107 transitions. [2021-06-05 16:36:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:36:27,268 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 16:36:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:27,324 INFO L225 Difference]: With dead ends: 24998 [2021-06-05 16:36:27,324 INFO L226 Difference]: Without dead ends: 24951 [2021-06-05 16:36:27,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:36:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24951 states. [2021-06-05 16:36:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24951 to 20735. [2021-06-05 16:36:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20735 states, 20734 states have (on average 3.910244043599884) internal successors, (81075), 20734 states have internal predecessors, (81075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20735 states to 20735 states and 81075 transitions. [2021-06-05 16:36:27,736 INFO L78 Accepts]: Start accepts. Automaton has 20735 states and 81075 transitions. Word has length 28 [2021-06-05 16:36:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:27,736 INFO L482 AbstractCegarLoop]: Abstraction has 20735 states and 81075 transitions. [2021-06-05 16:36:27,736 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 16:36:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 20735 states and 81075 transitions. [2021-06-05 16:36:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:27,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:27,766 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 16:36:27,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5857,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:27,967 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:27,967 INFO L82 PathProgramCache]: Analyzing trace with hash 541079027, now seen corresponding path program 116 times [2021-06-05 16:36:27,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:27,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733651146] [2021-06-05 16:36:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:27,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:27,993 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 16:36:27,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:27,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733651146] [2021-06-05 16:36:27,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733651146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:27,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251267942] [2021-06-05 16:36:27,994 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 16:36:28,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:28,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:28,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:28,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:28,067 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 16:36:28,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251267942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:28,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:28,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:36:28,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31027983] [2021-06-05 16:36:28,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:36:28,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:28,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:36:28,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:36:28,068 INFO L87 Difference]: Start difference. First operand 20735 states and 81075 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 16:36:28,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:28,395 INFO L93 Difference]: Finished difference Result 23483 states and 89423 transitions. [2021-06-05 16:36:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:36:28,395 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 16:36:28,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:28,451 INFO L225 Difference]: With dead ends: 23483 [2021-06-05 16:36:28,451 INFO L226 Difference]: Without dead ends: 23483 [2021-06-05 16:36:28,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:28,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23483 states. [2021-06-05 16:36:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23483 to 20238. [2021-06-05 16:36:28,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20238 states, 20237 states have (on average 3.89894747245145) internal successors, (78903), 20237 states have internal predecessors, (78903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:28,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20238 states to 20238 states and 78903 transitions. [2021-06-05 16:36:28,932 INFO L78 Accepts]: Start accepts. Automaton has 20238 states and 78903 transitions. Word has length 28 [2021-06-05 16:36:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:28,932 INFO L482 AbstractCegarLoop]: Abstraction has 20238 states and 78903 transitions. [2021-06-05 16:36:28,932 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 16:36:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 20238 states and 78903 transitions. [2021-06-05 16:36:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:28,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:28,962 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 16:36:29,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5858 [2021-06-05 16:36:29,163 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:29,163 INFO L82 PathProgramCache]: Analyzing trace with hash -410602411, now seen corresponding path program 117 times [2021-06-05 16:36:29,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:29,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913517687] [2021-06-05 16:36:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:29,198 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 16:36:29,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:29,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913517687] [2021-06-05 16:36:29,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913517687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:29,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206421285] [2021-06-05 16:36:29,198 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 16:36:29,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:36:29,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:29,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:29,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:29,301 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 16:36:29,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206421285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:29,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:29,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:36:29,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490980094] [2021-06-05 16:36:29,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:36:29,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:36:29,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:36:29,302 INFO L87 Difference]: Start difference. First operand 20238 states and 78903 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 16:36:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:30,164 INFO L93 Difference]: Finished difference Result 32137 states and 119230 transitions. [2021-06-05 16:36:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:36:30,165 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 16:36:30,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:30,236 INFO L225 Difference]: With dead ends: 32137 [2021-06-05 16:36:30,236 INFO L226 Difference]: Without dead ends: 32137 [2021-06-05 16:36:30,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:36:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32137 states. [2021-06-05 16:36:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32137 to 20300. [2021-06-05 16:36:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20300 states, 20299 states have (on average 3.8972855805704714) internal successors, (79111), 20299 states have internal predecessors, (79111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20300 states to 20300 states and 79111 transitions. [2021-06-05 16:36:30,711 INFO L78 Accepts]: Start accepts. Automaton has 20300 states and 79111 transitions. Word has length 28 [2021-06-05 16:36:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:30,712 INFO L482 AbstractCegarLoop]: Abstraction has 20300 states and 79111 transitions. [2021-06-05 16:36:30,712 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 16:36:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 20300 states and 79111 transitions. [2021-06-05 16:36:30,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:30,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:30,741 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 16:36:30,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5859,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:30,941 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:30,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:30,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1386921255, now seen corresponding path program 118 times [2021-06-05 16:36:30,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:30,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289028516] [2021-06-05 16:36:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:30,976 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 16:36:30,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:30,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289028516] [2021-06-05 16:36:30,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289028516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:30,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054717489] [2021-06-05 16:36:30,976 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 16:36:30,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:30,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:30,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:31,085 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 16:36:31,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054717489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:31,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:31,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:36:31,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883054524] [2021-06-05 16:36:31,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:31,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:31,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:31,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:31,086 INFO L87 Difference]: Start difference. First operand 20300 states and 79111 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 16:36:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:32,558 INFO L93 Difference]: Finished difference Result 41281 states and 151393 transitions. [2021-06-05 16:36:32,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:36:32,569 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 16:36:32,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:32,670 INFO L225 Difference]: With dead ends: 41281 [2021-06-05 16:36:32,670 INFO L226 Difference]: Without dead ends: 41281 [2021-06-05 16:36:32,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 820.2ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 16:36:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41281 states. [2021-06-05 16:36:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41281 to 20305. [2021-06-05 16:36:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20305 states, 20304 states have (on average 3.899330181245075) internal successors, (79172), 20304 states have internal predecessors, (79172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20305 states to 20305 states and 79172 transitions. [2021-06-05 16:36:33,236 INFO L78 Accepts]: Start accepts. Automaton has 20305 states and 79172 transitions. Word has length 28 [2021-06-05 16:36:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:33,236 INFO L482 AbstractCegarLoop]: Abstraction has 20305 states and 79172 transitions. [2021-06-05 16:36:33,236 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 16:36:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 20305 states and 79172 transitions. [2021-06-05 16:36:33,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:33,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:33,266 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 16:36:33,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5860 [2021-06-05 16:36:33,467 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:33,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:33,467 INFO L82 PathProgramCache]: Analyzing trace with hash -819969175, now seen corresponding path program 119 times [2021-06-05 16:36:33,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:33,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994720143] [2021-06-05 16:36:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:33,512 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 16:36:33,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:33,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994720143] [2021-06-05 16:36:33,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994720143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:33,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236437288] [2021-06-05 16:36:33,513 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 16:36:33,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:36:33,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:33,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:33,638 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 16:36:33,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236437288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:33,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:33,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:36:33,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40912097] [2021-06-05 16:36:33,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:33,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:33,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:33,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:33,639 INFO L87 Difference]: Start difference. First operand 20305 states and 79172 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 16:36:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:35,002 INFO L93 Difference]: Finished difference Result 40959 states and 150883 transitions. [2021-06-05 16:36:35,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:36:35,002 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 16:36:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:35,098 INFO L225 Difference]: With dead ends: 40959 [2021-06-05 16:36:35,098 INFO L226 Difference]: Without dead ends: 40959 [2021-06-05 16:36:35,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 835.1ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 16:36:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40959 states. [2021-06-05 16:36:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40959 to 20093. [2021-06-05 16:36:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20093 states, 20092 states have (on average 3.8916484172805097) internal successors, (78191), 20092 states have internal predecessors, (78191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20093 states to 20093 states and 78191 transitions. [2021-06-05 16:36:35,780 INFO L78 Accepts]: Start accepts. Automaton has 20093 states and 78191 transitions. Word has length 28 [2021-06-05 16:36:35,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:35,780 INFO L482 AbstractCegarLoop]: Abstraction has 20093 states and 78191 transitions. [2021-06-05 16:36:35,780 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 16:36:35,780 INFO L276 IsEmpty]: Start isEmpty. Operand 20093 states and 78191 transitions. [2021-06-05 16:36:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:35,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:35,809 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 16:36:36,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5861,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:36,009 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash 116169497, now seen corresponding path program 120 times [2021-06-05 16:36:36,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:36,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927511479] [2021-06-05 16:36:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:36,037 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 16:36:36,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:36,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927511479] [2021-06-05 16:36:36,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927511479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:36,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496706852] [2021-06-05 16:36:36,038 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 16:36:36,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:36:36,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:36:36,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:36,121 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 16:36:36,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496706852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:36,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:36,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:36:36,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388719470] [2021-06-05 16:36:36,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:36:36,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:36,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:36:36,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:36:36,122 INFO L87 Difference]: Start difference. First operand 20093 states and 78191 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 16:36:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:36,380 INFO L93 Difference]: Finished difference Result 29554 states and 110558 transitions. [2021-06-05 16:36:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:36:36,381 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 16:36:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:36,445 INFO L225 Difference]: With dead ends: 29554 [2021-06-05 16:36:36,446 INFO L226 Difference]: Without dead ends: 29537 [2021-06-05 16:36:36,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:36,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29537 states. [2021-06-05 16:36:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29537 to 20364. [2021-06-05 16:36:36,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20364 states, 20363 states have (on average 3.8971173206305556) internal successors, (79357), 20363 states have internal predecessors, (79357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20364 states to 20364 states and 79357 transitions. [2021-06-05 16:36:36,889 INFO L78 Accepts]: Start accepts. Automaton has 20364 states and 79357 transitions. Word has length 28 [2021-06-05 16:36:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:36,889 INFO L482 AbstractCegarLoop]: Abstraction has 20364 states and 79357 transitions. [2021-06-05 16:36:36,889 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 16:36:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 20364 states and 79357 transitions. [2021-06-05 16:36:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:36,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:36,919 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 16:36:37,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5862,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:37,120 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1026756543, now seen corresponding path program 121 times [2021-06-05 16:36:37,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:37,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343500249] [2021-06-05 16:36:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:37,147 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 16:36:37,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:37,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343500249] [2021-06-05 16:36:37,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343500249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:37,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575831441] [2021-06-05 16:36:37,148 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 16:36:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:37,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:36:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:37,227 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 16:36:37,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575831441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:37,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:37,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:36:37,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589405431] [2021-06-05 16:36:37,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:36:37,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:37,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:36:37,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:36:37,228 INFO L87 Difference]: Start difference. First operand 20364 states and 79357 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 16:36:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:37,520 INFO L93 Difference]: Finished difference Result 31323 states and 116077 transitions. [2021-06-05 16:36:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:36:37,520 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 16:36:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:37,591 INFO L225 Difference]: With dead ends: 31323 [2021-06-05 16:36:37,591 INFO L226 Difference]: Without dead ends: 31323 [2021-06-05 16:36:37,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:36:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-06-05 16:36:38,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 20033. [2021-06-05 16:36:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20033 states, 20032 states have (on average 3.8823382587859423) internal successors, (77771), 20032 states have internal predecessors, (77771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20033 states to 20033 states and 77771 transitions. [2021-06-05 16:36:38,195 INFO L78 Accepts]: Start accepts. Automaton has 20033 states and 77771 transitions. Word has length 28 [2021-06-05 16:36:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:38,195 INFO L482 AbstractCegarLoop]: Abstraction has 20033 states and 77771 transitions. [2021-06-05 16:36:38,195 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 16:36:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 20033 states and 77771 transitions. [2021-06-05 16:36:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:38,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:38,224 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 16:36:38,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5863,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:38,441 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:38,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:38,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1921529187, now seen corresponding path program 122 times [2021-06-05 16:36:38,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:38,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391357695] [2021-06-05 16:36:38,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:38,488 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 16:36:38,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:38,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391357695] [2021-06-05 16:36:38,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391357695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:38,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456975433] [2021-06-05 16:36:38,488 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 16:36:38,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:38,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:38,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:38,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:38,593 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 16:36:38,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456975433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:38,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:38,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:36:38,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820684479] [2021-06-05 16:36:38,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:38,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:38,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:38,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:38,594 INFO L87 Difference]: Start difference. First operand 20033 states and 77771 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 16:36:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:39,434 INFO L93 Difference]: Finished difference Result 29652 states and 110343 transitions. [2021-06-05 16:36:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:36:39,434 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 16:36:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:39,499 INFO L225 Difference]: With dead ends: 29652 [2021-06-05 16:36:39,499 INFO L226 Difference]: Without dead ends: 29652 [2021-06-05 16:36:39,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:36:39,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29652 states. [2021-06-05 16:36:39,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29652 to 20077. [2021-06-05 16:36:39,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20077 states, 20076 states have (on average 3.881002191671648) internal successors, (77915), 20076 states have internal predecessors, (77915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20077 states to 20077 states and 77915 transitions. [2021-06-05 16:36:39,965 INFO L78 Accepts]: Start accepts. Automaton has 20077 states and 77915 transitions. Word has length 28 [2021-06-05 16:36:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:39,966 INFO L482 AbstractCegarLoop]: Abstraction has 20077 states and 77915 transitions. [2021-06-05 16:36:39,966 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 16:36:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 20077 states and 77915 transitions. [2021-06-05 16:36:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:39,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:39,997 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 16:36:40,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5864,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:40,197 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1588524015, now seen corresponding path program 123 times [2021-06-05 16:36:40,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:40,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156017236] [2021-06-05 16:36:40,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:40,232 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 16:36:40,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:40,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156017236] [2021-06-05 16:36:40,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156017236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:40,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480169808] [2021-06-05 16:36:40,232 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 16:36:40,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:36:40,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:40,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:40,326 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 16:36:40,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480169808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:40,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:40,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:36:40,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542426814] [2021-06-05 16:36:40,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:40,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:40,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:40,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:40,327 INFO L87 Difference]: Start difference. First operand 20077 states and 77915 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 16:36:41,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:41,280 INFO L93 Difference]: Finished difference Result 31294 states and 115097 transitions. [2021-06-05 16:36:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:36:41,280 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 16:36:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:41,352 INFO L225 Difference]: With dead ends: 31294 [2021-06-05 16:36:41,353 INFO L226 Difference]: Without dead ends: 31294 [2021-06-05 16:36:41,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 526.4ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:36:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31294 states. [2021-06-05 16:36:41,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31294 to 20595. [2021-06-05 16:36:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20595 states, 20594 states have (on average 3.8609303680683693) internal successors, (79512), 20594 states have internal predecessors, (79512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20595 states to 20595 states and 79512 transitions. [2021-06-05 16:36:41,923 INFO L78 Accepts]: Start accepts. Automaton has 20595 states and 79512 transitions. Word has length 28 [2021-06-05 16:36:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:41,923 INFO L482 AbstractCegarLoop]: Abstraction has 20595 states and 79512 transitions. [2021-06-05 16:36:41,923 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 16:36:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 20595 states and 79512 transitions. [2021-06-05 16:36:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:41,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:41,952 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 16:36:42,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5865,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:42,152 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:42,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1633345157, now seen corresponding path program 124 times [2021-06-05 16:36:42,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:42,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228228966] [2021-06-05 16:36:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:42,186 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 16:36:42,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:42,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228228966] [2021-06-05 16:36:42,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228228966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:42,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527190497] [2021-06-05 16:36:42,186 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 16:36:42,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:42,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:42,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:42,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:42,271 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 16:36:42,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527190497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:42,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:42,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:36:42,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312169858] [2021-06-05 16:36:42,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:36:42,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:42,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:36:42,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:36:42,272 INFO L87 Difference]: Start difference. First operand 20595 states and 79512 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 16:36:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:43,105 INFO L93 Difference]: Finished difference Result 30356 states and 112645 transitions. [2021-06-05 16:36:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:36:43,106 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 16:36:43,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:43,171 INFO L225 Difference]: With dead ends: 30356 [2021-06-05 16:36:43,171 INFO L226 Difference]: Without dead ends: 30352 [2021-06-05 16:36:43,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 435.7ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:36:43,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30352 states. [2021-06-05 16:36:43,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30352 to 20487. [2021-06-05 16:36:43,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20487 states, 20486 states have (on average 3.863711803182661) internal successors, (79152), 20486 states have internal predecessors, (79152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20487 states to 20487 states and 79152 transitions. [2021-06-05 16:36:43,660 INFO L78 Accepts]: Start accepts. Automaton has 20487 states and 79152 transitions. Word has length 28 [2021-06-05 16:36:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:43,660 INFO L482 AbstractCegarLoop]: Abstraction has 20487 states and 79152 transitions. [2021-06-05 16:36:43,660 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 16:36:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 20487 states and 79152 transitions. [2021-06-05 16:36:43,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:43,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:43,689 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 16:36:43,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5866,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:43,889 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:43,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:43,889 INFO L82 PathProgramCache]: Analyzing trace with hash -767961219, now seen corresponding path program 125 times [2021-06-05 16:36:43,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:43,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709068238] [2021-06-05 16:36:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:43,920 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 16:36:43,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:43,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709068238] [2021-06-05 16:36:43,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709068238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:43,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560682230] [2021-06-05 16:36:43,920 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 16:36:43,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:36:43,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:43,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:36:43,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:44,011 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 16:36:44,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560682230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:44,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:44,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:36:44,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194549512] [2021-06-05 16:36:44,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:36:44,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:44,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:36:44,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:36:44,012 INFO L87 Difference]: Start difference. First operand 20487 states and 79152 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 16:36:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:44,229 INFO L93 Difference]: Finished difference Result 25467 states and 94990 transitions. [2021-06-05 16:36:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:36:44,229 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 16:36:44,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:44,283 INFO L225 Difference]: With dead ends: 25467 [2021-06-05 16:36:44,283 INFO L226 Difference]: Without dead ends: 25467 [2021-06-05 16:36:44,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:36:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25467 states. [2021-06-05 16:36:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25467 to 20797. [2021-06-05 16:36:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20797 states, 20796 states have (on average 3.854827851509906) internal successors, (80165), 20796 states have internal predecessors, (80165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20797 states to 20797 states and 80165 transitions. [2021-06-05 16:36:44,750 INFO L78 Accepts]: Start accepts. Automaton has 20797 states and 80165 transitions. Word has length 28 [2021-06-05 16:36:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:44,750 INFO L482 AbstractCegarLoop]: Abstraction has 20797 states and 80165 transitions. [2021-06-05 16:36:44,750 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 16:36:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 20797 states and 80165 transitions. [2021-06-05 16:36:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:44,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:44,781 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 16:36:44,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5867,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:44,981 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:44,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:44,981 INFO L82 PathProgramCache]: Analyzing trace with hash 162238525, now seen corresponding path program 126 times [2021-06-05 16:36:44,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:44,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139496037] [2021-06-05 16:36:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:45,015 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 16:36:45,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:45,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139496037] [2021-06-05 16:36:45,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139496037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:45,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153000838] [2021-06-05 16:36:45,016 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 16:36:45,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:36:45,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:45,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:45,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:45,104 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 16:36:45,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153000838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:45,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:45,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:36:45,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744303722] [2021-06-05 16:36:45,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:45,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:45,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:45,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:45,105 INFO L87 Difference]: Start difference. First operand 20797 states and 80165 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 16:36:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:45,881 INFO L93 Difference]: Finished difference Result 31245 states and 114624 transitions. [2021-06-05 16:36:45,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:36:45,881 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 16:36:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:45,952 INFO L225 Difference]: With dead ends: 31245 [2021-06-05 16:36:45,952 INFO L226 Difference]: Without dead ends: 31245 [2021-06-05 16:36:45,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 417.3ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:36:45,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31245 states. [2021-06-05 16:36:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31245 to 22412. [2021-06-05 16:36:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22412 states, 22411 states have (on average 3.866538753290795) internal successors, (86653), 22411 states have internal predecessors, (86653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22412 states to 22412 states and 86653 transitions. [2021-06-05 16:36:46,465 INFO L78 Accepts]: Start accepts. Automaton has 22412 states and 86653 transitions. Word has length 28 [2021-06-05 16:36:46,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:46,465 INFO L482 AbstractCegarLoop]: Abstraction has 22412 states and 86653 transitions. [2021-06-05 16:36:46,465 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 16:36:46,465 INFO L276 IsEmpty]: Start isEmpty. Operand 22412 states and 86653 transitions. [2021-06-05 16:36:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:46,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:46,498 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 16:36:46,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5868,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:46,698 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:46,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1677533803, now seen corresponding path program 127 times [2021-06-05 16:36:46,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:46,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28195804] [2021-06-05 16:36:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:46,732 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 16:36:46,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:46,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28195804] [2021-06-05 16:36:46,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28195804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:46,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181509960] [2021-06-05 16:36:46,733 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 16:36:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:46,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:46,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:46,812 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 16:36:46,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181509960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:46,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:46,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:36:46,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739281313] [2021-06-05 16:36:46,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:46,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:46,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:46,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:46,813 INFO L87 Difference]: Start difference. First operand 22412 states and 86653 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 16:36:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:47,493 INFO L93 Difference]: Finished difference Result 29507 states and 110143 transitions. [2021-06-05 16:36:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:36:47,493 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 16:36:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:47,560 INFO L225 Difference]: With dead ends: 29507 [2021-06-05 16:36:47,560 INFO L226 Difference]: Without dead ends: 29495 [2021-06-05 16:36:47,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 351.7ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:36:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29495 states. [2021-06-05 16:36:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29495 to 22542. [2021-06-05 16:36:48,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 3.861763009626902) internal successors, (87048), 22541 states have internal predecessors, (87048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 87048 transitions. [2021-06-05 16:36:48,191 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 87048 transitions. Word has length 28 [2021-06-05 16:36:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:48,191 INFO L482 AbstractCegarLoop]: Abstraction has 22542 states and 87048 transitions. [2021-06-05 16:36:48,191 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 16:36:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 87048 transitions. [2021-06-05 16:36:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:48,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:48,227 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 16:36:48,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5869,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:48,428 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:48,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:48,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1986650177, now seen corresponding path program 128 times [2021-06-05 16:36:48,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:48,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258488800] [2021-06-05 16:36:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:48,459 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 16:36:48,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:48,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258488800] [2021-06-05 16:36:48,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258488800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:48,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554846985] [2021-06-05 16:36:48,460 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 16:36:48,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:48,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:36:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:48,544 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 16:36:48,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554846985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:48,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:48,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:36:48,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071664993] [2021-06-05 16:36:48,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:36:48,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:48,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:36:48,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:36:48,545 INFO L87 Difference]: Start difference. First operand 22542 states and 87048 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 16:36:48,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:48,803 INFO L93 Difference]: Finished difference Result 25801 states and 98005 transitions. [2021-06-05 16:36:48,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:36:48,804 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 16:36:48,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:48,866 INFO L225 Difference]: With dead ends: 25801 [2021-06-05 16:36:48,866 INFO L226 Difference]: Without dead ends: 25801 [2021-06-05 16:36:48,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:36:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25801 states. [2021-06-05 16:36:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25801 to 23345. [2021-06-05 16:36:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23345 states, 23344 states have (on average 3.8565370116518163) internal successors, (90027), 23344 states have internal predecessors, (90027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23345 states to 23345 states and 90027 transitions. [2021-06-05 16:36:49,320 INFO L78 Accepts]: Start accepts. Automaton has 23345 states and 90027 transitions. Word has length 28 [2021-06-05 16:36:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:49,320 INFO L482 AbstractCegarLoop]: Abstraction has 23345 states and 90027 transitions. [2021-06-05 16:36:49,320 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 16:36:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 23345 states and 90027 transitions. [2021-06-05 16:36:49,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:49,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:49,356 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 16:36:49,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5870 [2021-06-05 16:36:49,557 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:49,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1864655551, now seen corresponding path program 129 times [2021-06-05 16:36:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:49,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292082397] [2021-06-05 16:36:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:49,593 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 16:36:49,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:49,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292082397] [2021-06-05 16:36:49,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292082397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:49,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108176832] [2021-06-05 16:36:49,593 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 16:36:49,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:36:49,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:49,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:49,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:49,676 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 16:36:49,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108176832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:49,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:49,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:36:49,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60167886] [2021-06-05 16:36:49,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:36:49,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:49,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:36:49,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:36:49,677 INFO L87 Difference]: Start difference. First operand 23345 states and 90027 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 16:36:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:50,418 INFO L93 Difference]: Finished difference Result 31278 states and 115554 transitions. [2021-06-05 16:36:50,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:36:50,418 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 16:36:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:50,491 INFO L225 Difference]: With dead ends: 31278 [2021-06-05 16:36:50,491 INFO L226 Difference]: Without dead ends: 31278 [2021-06-05 16:36:50,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 401.3ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:36:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31278 states. [2021-06-05 16:36:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31278 to 24529. [2021-06-05 16:36:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24529 states, 24528 states have (on average 3.8241601435094585) internal successors, (93799), 24528 states have internal predecessors, (93799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24529 states to 24529 states and 93799 transitions. [2021-06-05 16:36:51,037 INFO L78 Accepts]: Start accepts. Automaton has 24529 states and 93799 transitions. Word has length 28 [2021-06-05 16:36:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:51,037 INFO L482 AbstractCegarLoop]: Abstraction has 24529 states and 93799 transitions. [2021-06-05 16:36:51,037 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 16:36:51,037 INFO L276 IsEmpty]: Start isEmpty. Operand 24529 states and 93799 transitions. [2021-06-05 16:36:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:51,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:51,073 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 16:36:51,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5871 [2021-06-05 16:36:51,273 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1124562599, now seen corresponding path program 130 times [2021-06-05 16:36:51,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:51,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639126027] [2021-06-05 16:36:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:51,305 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 16:36:51,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:51,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639126027] [2021-06-05 16:36:51,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639126027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:51,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963534412] [2021-06-05 16:36:51,305 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 16:36:51,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:51,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:51,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:51,390 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 16:36:51,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963534412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:51,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:51,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:36:51,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786533814] [2021-06-05 16:36:51,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:36:51,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:51,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:36:51,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:36:51,391 INFO L87 Difference]: Start difference. First operand 24529 states and 93799 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 16:36:52,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:52,019 INFO L93 Difference]: Finished difference Result 30402 states and 113216 transitions. [2021-06-05 16:36:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:36:52,019 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 16:36:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:52,087 INFO L225 Difference]: With dead ends: 30402 [2021-06-05 16:36:52,087 INFO L226 Difference]: Without dead ends: 30394 [2021-06-05 16:36:52,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:36:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30394 states. [2021-06-05 16:36:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30394 to 24351. [2021-06-05 16:36:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24351 states, 24350 states have (on average 3.830390143737166) internal successors, (93270), 24350 states have internal predecessors, (93270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:52,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24351 states to 24351 states and 93270 transitions. [2021-06-05 16:36:52,592 INFO L78 Accepts]: Start accepts. Automaton has 24351 states and 93270 transitions. Word has length 28 [2021-06-05 16:36:52,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:52,592 INFO L482 AbstractCegarLoop]: Abstraction has 24351 states and 93270 transitions. [2021-06-05 16:36:52,592 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 16:36:52,592 INFO L276 IsEmpty]: Start isEmpty. Operand 24351 states and 93270 transitions. [2021-06-05 16:36:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:52,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:52,625 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 16:36:52,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5872 [2021-06-05 16:36:52,825 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:52,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:52,826 INFO L82 PathProgramCache]: Analyzing trace with hash 325434329, now seen corresponding path program 131 times [2021-06-05 16:36:52,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:52,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869432343] [2021-06-05 16:36:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:52,855 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 16:36:52,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:52,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869432343] [2021-06-05 16:36:52,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869432343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:52,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635955180] [2021-06-05 16:36:52,856 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 16:36:52,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:36:52,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:52,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:52,937 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 16:36:52,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635955180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:52,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:52,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:36:52,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937474501] [2021-06-05 16:36:52,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:36:52,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:52,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:36:52,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:36:52,938 INFO L87 Difference]: Start difference. First operand 24351 states and 93270 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 16:36:53,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:53,628 INFO L93 Difference]: Finished difference Result 32206 states and 118699 transitions. [2021-06-05 16:36:53,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:36:53,628 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 16:36:53,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:53,700 INFO L225 Difference]: With dead ends: 32206 [2021-06-05 16:36:53,701 INFO L226 Difference]: Without dead ends: 32206 [2021-06-05 16:36:53,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:36:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32206 states. [2021-06-05 16:36:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32206 to 25303. [2021-06-05 16:36:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25303 states, 25302 states have (on average 3.807287961425974) internal successors, (96332), 25302 states have internal predecessors, (96332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25303 states to 25303 states and 96332 transitions. [2021-06-05 16:36:54,253 INFO L78 Accepts]: Start accepts. Automaton has 25303 states and 96332 transitions. Word has length 28 [2021-06-05 16:36:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:54,253 INFO L482 AbstractCegarLoop]: Abstraction has 25303 states and 96332 transitions. [2021-06-05 16:36:54,253 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 16:36:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 25303 states and 96332 transitions. [2021-06-05 16:36:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:54,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:54,288 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 16:36:54,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5873,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:54,488 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash -757588327, now seen corresponding path program 132 times [2021-06-05 16:36:54,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:54,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052570749] [2021-06-05 16:36:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:54,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:54,519 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 16:36:54,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:54,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052570749] [2021-06-05 16:36:54,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052570749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:54,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371593914] [2021-06-05 16:36:54,520 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 16:36:54,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:36:54,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:54,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:54,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:54,589 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 16:36:54,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371593914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:54,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:54,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:36:54,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600007577] [2021-06-05 16:36:54,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:36:54,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:36:54,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:36:54,590 INFO L87 Difference]: Start difference. First operand 25303 states and 96332 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 16:36:54,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:54,986 INFO L93 Difference]: Finished difference Result 30966 states and 116947 transitions. [2021-06-05 16:36:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:36:54,986 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 16:36:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:55,058 INFO L225 Difference]: With dead ends: 30966 [2021-06-05 16:36:55,058 INFO L226 Difference]: Without dead ends: 30953 [2021-06-05 16:36:55,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:36:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30953 states. [2021-06-05 16:36:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30953 to 29426. [2021-06-05 16:36:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29426 states, 29425 states have (on average 3.824231096006797) internal successors, (112528), 29425 states have internal predecessors, (112528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29426 states to 29426 states and 112528 transitions. [2021-06-05 16:36:55,728 INFO L78 Accepts]: Start accepts. Automaton has 29426 states and 112528 transitions. Word has length 28 [2021-06-05 16:36:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:55,728 INFO L482 AbstractCegarLoop]: Abstraction has 29426 states and 112528 transitions. [2021-06-05 16:36:55,728 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 16:36:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 29426 states and 112528 transitions. [2021-06-05 16:36:55,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:55,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:55,776 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 16:36:55,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5874,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:55,976 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:55,977 INFO L82 PathProgramCache]: Analyzing trace with hash 713489791, now seen corresponding path program 133 times [2021-06-05 16:36:55,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:55,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944985458] [2021-06-05 16:36:55,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:56,007 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 16:36:56,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:56,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944985458] [2021-06-05 16:36:56,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944985458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:56,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94945073] [2021-06-05 16:36:56,007 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 16:36:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:56,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:56,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:56,081 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 16:36:56,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94945073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:56,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:56,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:36:56,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387887460] [2021-06-05 16:36:56,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:36:56,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:56,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:36:56,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:36:56,082 INFO L87 Difference]: Start difference. First operand 29426 states and 112528 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 16:36:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:56,444 INFO L93 Difference]: Finished difference Result 32429 states and 121859 transitions. [2021-06-05 16:36:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:36:56,445 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 16:36:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:56,517 INFO L225 Difference]: With dead ends: 32429 [2021-06-05 16:36:56,517 INFO L226 Difference]: Without dead ends: 32429 [2021-06-05 16:36:56,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:36:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32429 states. [2021-06-05 16:36:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32429 to 29171. [2021-06-05 16:36:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29171 states, 29170 states have (on average 3.820671923208776) internal successors, (111449), 29170 states have internal predecessors, (111449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29171 states to 29171 states and 111449 transitions. [2021-06-05 16:36:57,120 INFO L78 Accepts]: Start accepts. Automaton has 29171 states and 111449 transitions. Word has length 28 [2021-06-05 16:36:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:57,120 INFO L482 AbstractCegarLoop]: Abstraction has 29171 states and 111449 transitions. [2021-06-05 16:36:57,120 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 16:36:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 29171 states and 111449 transitions. [2021-06-05 16:36:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:57,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:57,165 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 16:36:57,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5875 [2021-06-05 16:36:57,366 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:57,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:57,366 INFO L82 PathProgramCache]: Analyzing trace with hash 280613187, now seen corresponding path program 134 times [2021-06-05 16:36:57,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:57,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110284854] [2021-06-05 16:36:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:57,396 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 16:36:57,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:57,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110284854] [2021-06-05 16:36:57,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110284854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:57,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228034427] [2021-06-05 16:36:57,397 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 16:36:57,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:57,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:57,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:36:57,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:57,482 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 16:36:57,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228034427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:57,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:57,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:36:57,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588019427] [2021-06-05 16:36:57,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:36:57,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:57,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:36:57,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:36:57,483 INFO L87 Difference]: Start difference. First operand 29171 states and 111449 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 16:36:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:58,061 INFO L93 Difference]: Finished difference Result 35787 states and 133219 transitions. [2021-06-05 16:36:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:36:58,061 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 16:36:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:58,146 INFO L225 Difference]: With dead ends: 35787 [2021-06-05 16:36:58,146 INFO L226 Difference]: Without dead ends: 35779 [2021-06-05 16:36:58,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:36:58,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35779 states. [2021-06-05 16:36:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35779 to 29137. [2021-06-05 16:36:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29137 states, 29136 states have (on average 3.82111477210324) internal successors, (111332), 29136 states have internal predecessors, (111332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29137 states to 29137 states and 111332 transitions. [2021-06-05 16:36:58,908 INFO L78 Accepts]: Start accepts. Automaton has 29137 states and 111332 transitions. Word has length 28 [2021-06-05 16:36:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:58,908 INFO L482 AbstractCegarLoop]: Abstraction has 29137 states and 111332 transitions. [2021-06-05 16:36:58,908 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 16:36:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 29137 states and 111332 transitions. [2021-06-05 16:36:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:36:58,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:58,956 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 16:36:59,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5876,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:59,156 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:59,156 INFO L82 PathProgramCache]: Analyzing trace with hash -615207629, now seen corresponding path program 135 times [2021-06-05 16:36:59,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:59,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197817116] [2021-06-05 16:36:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:59,187 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 16:36:59,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:59,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197817116] [2021-06-05 16:36:59,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197817116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:59,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950052756] [2021-06-05 16:36:59,188 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 16:36:59,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:36:59,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:59,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:36:59,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:59,257 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 16:36:59,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950052756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:59,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:59,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:36:59,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530908481] [2021-06-05 16:36:59,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:36:59,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:36:59,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:36:59,258 INFO L87 Difference]: Start difference. First operand 29137 states and 111332 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 16:36:59,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:59,693 INFO L93 Difference]: Finished difference Result 31983 states and 120794 transitions. [2021-06-05 16:36:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:36:59,693 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 16:36:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:59,766 INFO L225 Difference]: With dead ends: 31983 [2021-06-05 16:36:59,766 INFO L226 Difference]: Without dead ends: 31983 [2021-06-05 16:36:59,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:36:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31983 states. [2021-06-05 16:37:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31983 to 29669. [2021-06-05 16:37:00,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29669 states, 29668 states have (on average 3.8194687879196443) internal successors, (113316), 29668 states have internal predecessors, (113316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29669 states to 29669 states and 113316 transitions. [2021-06-05 16:37:00,350 INFO L78 Accepts]: Start accepts. Automaton has 29669 states and 113316 transitions. Word has length 28 [2021-06-05 16:37:00,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:00,350 INFO L482 AbstractCegarLoop]: Abstraction has 29669 states and 113316 transitions. [2021-06-05 16:37:00,350 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 16:37:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 29669 states and 113316 transitions. [2021-06-05 16:37:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:00,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:00,395 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 16:37:00,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5877,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:00,609 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:00,609 INFO L82 PathProgramCache]: Analyzing trace with hash 877949845, now seen corresponding path program 136 times [2021-06-05 16:37:00,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:00,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927662466] [2021-06-05 16:37:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:00,639 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 16:37:00,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:00,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927662466] [2021-06-05 16:37:00,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927662466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:00,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479813672] [2021-06-05 16:37:00,639 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 16:37:00,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:37:00,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:00,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:00,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:00,713 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 16:37:00,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479813672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:00,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:00,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:37:00,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086873700] [2021-06-05 16:37:00,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:37:00,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:00,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:37:00,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:37:00,714 INFO L87 Difference]: Start difference. First operand 29669 states and 113316 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 16:37:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:01,283 INFO L93 Difference]: Finished difference Result 36622 states and 136400 transitions. [2021-06-05 16:37:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:37:01,284 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 16:37:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:01,373 INFO L225 Difference]: With dead ends: 36622 [2021-06-05 16:37:01,373 INFO L226 Difference]: Without dead ends: 36598 [2021-06-05 16:37:01,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:37:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36598 states. [2021-06-05 16:37:02,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36598 to 29841. [2021-06-05 16:37:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29841 states, 29840 states have (on average 3.815348525469169) internal successors, (113850), 29840 states have internal predecessors, (113850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29841 states to 29841 states and 113850 transitions. [2021-06-05 16:37:02,136 INFO L78 Accepts]: Start accepts. Automaton has 29841 states and 113850 transitions. Word has length 28 [2021-06-05 16:37:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:02,136 INFO L482 AbstractCegarLoop]: Abstraction has 29841 states and 113850 transitions. [2021-06-05 16:37:02,136 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 16:37:02,136 INFO L276 IsEmpty]: Start isEmpty. Operand 29841 states and 113850 transitions. [2021-06-05 16:37:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:02,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:02,182 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 16:37:02,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5878,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:02,383 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:02,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:02,383 INFO L82 PathProgramCache]: Analyzing trace with hash -973059849, now seen corresponding path program 137 times [2021-06-05 16:37:02,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:02,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65129193] [2021-06-05 16:37:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:02,420 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 16:37:02,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:02,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65129193] [2021-06-05 16:37:02,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65129193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:02,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146480048] [2021-06-05 16:37:02,421 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 16:37:02,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:37:02,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:02,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:37:02,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:02,491 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 16:37:02,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146480048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:02,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:02,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 16:37:02,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77723301] [2021-06-05 16:37:02,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:37:02,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:02,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:37:02,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:37:02,491 INFO L87 Difference]: Start difference. First operand 29841 states and 113850 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 16:37:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:02,954 INFO L93 Difference]: Finished difference Result 32397 states and 122262 transitions. [2021-06-05 16:37:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:37:02,954 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 16:37:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:03,026 INFO L225 Difference]: With dead ends: 32397 [2021-06-05 16:37:03,026 INFO L226 Difference]: Without dead ends: 32397 [2021-06-05 16:37:03,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:37:03,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32397 states. [2021-06-05 16:37:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32397 to 29767. [2021-06-05 16:37:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29767 states, 29766 states have (on average 3.816233286299805) internal successors, (113594), 29766 states have internal predecessors, (113594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29767 states to 29767 states and 113594 transitions. [2021-06-05 16:37:03,621 INFO L78 Accepts]: Start accepts. Automaton has 29767 states and 113594 transitions. Word has length 28 [2021-06-05 16:37:03,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:03,621 INFO L482 AbstractCegarLoop]: Abstraction has 29767 states and 113594 transitions. [2021-06-05 16:37:03,621 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 16:37:03,621 INFO L276 IsEmpty]: Start isEmpty. Operand 29767 states and 113594 transitions. [2021-06-05 16:37:03,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:03,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:03,667 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 16:37:03,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5879,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:03,868 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:03,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:03,868 INFO L82 PathProgramCache]: Analyzing trace with hash -114543719, now seen corresponding path program 138 times [2021-06-05 16:37:03,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:03,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828300136] [2021-06-05 16:37:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:03,906 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 16:37:03,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:03,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828300136] [2021-06-05 16:37:03,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828300136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:03,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797573779] [2021-06-05 16:37:03,906 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 16:37:03,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:37:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:03,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:03,982 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 16:37:03,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797573779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:03,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:03,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:37:03,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910537156] [2021-06-05 16:37:03,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:37:03,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:03,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:37:03,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:37:03,982 INFO L87 Difference]: Start difference. First operand 29767 states and 113594 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 16:37:04,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:04,610 INFO L93 Difference]: Finished difference Result 36545 states and 136141 transitions. [2021-06-05 16:37:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:37:04,611 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 16:37:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:04,694 INFO L225 Difference]: With dead ends: 36545 [2021-06-05 16:37:04,694 INFO L226 Difference]: Without dead ends: 36505 [2021-06-05 16:37:04,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:37:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36505 states. [2021-06-05 16:37:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36505 to 29923. [2021-06-05 16:37:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29923 states, 29922 states have (on average 3.8122451707773544) internal successors, (114070), 29922 states have internal predecessors, (114070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29923 states to 29923 states and 114070 transitions. [2021-06-05 16:37:05,525 INFO L78 Accepts]: Start accepts. Automaton has 29923 states and 114070 transitions. Word has length 28 [2021-06-05 16:37:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:05,525 INFO L482 AbstractCegarLoop]: Abstraction has 29923 states and 114070 transitions. [2021-06-05 16:37:05,525 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 16:37:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 29923 states and 114070 transitions. [2021-06-05 16:37:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:05,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:05,579 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 16:37:05,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5880 [2021-06-05 16:37:05,779 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1924330329, now seen corresponding path program 139 times [2021-06-05 16:37:05,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:05,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55179251] [2021-06-05 16:37:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:05,813 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 16:37:05,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:05,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55179251] [2021-06-05 16:37:05,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55179251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:05,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43275814] [2021-06-05 16:37:05,813 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 16:37:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:05,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:05,943 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 16:37:05,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43275814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:05,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:05,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:37:05,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812158527] [2021-06-05 16:37:05,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:37:05,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:05,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:37:05,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:37:05,944 INFO L87 Difference]: Start difference. First operand 29923 states and 114070 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 16:37:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:07,263 INFO L93 Difference]: Finished difference Result 68562 states and 252414 transitions. [2021-06-05 16:37:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:37:07,263 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 16:37:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:07,457 INFO L225 Difference]: With dead ends: 68562 [2021-06-05 16:37:07,457 INFO L226 Difference]: Without dead ends: 68562 [2021-06-05 16:37:07,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 697.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:37:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68562 states. [2021-06-05 16:37:08,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68562 to 37607. [2021-06-05 16:37:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37607 states, 37606 states have (on average 3.890974844439717) internal successors, (146324), 37606 states have internal predecessors, (146324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37607 states to 37607 states and 146324 transitions. [2021-06-05 16:37:08,711 INFO L78 Accepts]: Start accepts. Automaton has 37607 states and 146324 transitions. Word has length 28 [2021-06-05 16:37:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:08,711 INFO L482 AbstractCegarLoop]: Abstraction has 37607 states and 146324 transitions. [2021-06-05 16:37:08,712 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 16:37:08,712 INFO L276 IsEmpty]: Start isEmpty. Operand 37607 states and 146324 transitions. [2021-06-05 16:37:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:08,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:08,772 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 16:37:08,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5881 [2021-06-05 16:37:08,987 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1803684887, now seen corresponding path program 140 times [2021-06-05 16:37:08,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:08,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910214683] [2021-06-05 16:37:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:09,019 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 16:37:09,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:09,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910214683] [2021-06-05 16:37:09,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910214683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:09,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591157162] [2021-06-05 16:37:09,019 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 16:37:09,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:37:09,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:09,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:09,137 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 16:37:09,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591157162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:09,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:09,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:37:09,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154852306] [2021-06-05 16:37:09,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:37:09,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:09,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:37:09,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:37:09,138 INFO L87 Difference]: Start difference. First operand 37607 states and 146324 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 16:37:10,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:10,488 INFO L93 Difference]: Finished difference Result 67978 states and 250871 transitions. [2021-06-05 16:37:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:37:10,488 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 16:37:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:10,661 INFO L225 Difference]: With dead ends: 67978 [2021-06-05 16:37:10,661 INFO L226 Difference]: Without dead ends: 67978 [2021-06-05 16:37:10,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 639.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:37:10,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67978 states. [2021-06-05 16:37:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67978 to 37604. [2021-06-05 16:37:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37604 states, 37603 states have (on average 3.8909129590724145) internal successors, (146310), 37603 states have internal predecessors, (146310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37604 states to 37604 states and 146310 transitions. [2021-06-05 16:37:11,833 INFO L78 Accepts]: Start accepts. Automaton has 37604 states and 146310 transitions. Word has length 28 [2021-06-05 16:37:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:11,833 INFO L482 AbstractCegarLoop]: Abstraction has 37604 states and 146310 transitions. [2021-06-05 16:37:11,833 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 16:37:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 37604 states and 146310 transitions. [2021-06-05 16:37:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:11,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:11,890 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 16:37:12,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5882 [2021-06-05 16:37:12,090 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:12,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:12,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1318936551, now seen corresponding path program 141 times [2021-06-05 16:37:12,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:12,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129567911] [2021-06-05 16:37:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:12,121 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 16:37:12,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:12,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129567911] [2021-06-05 16:37:12,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129567911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:12,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408432965] [2021-06-05 16:37:12,122 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 16:37:12,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:37:12,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:12,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:12,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:12,230 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 16:37:12,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408432965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:12,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:12,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:37:12,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126836410] [2021-06-05 16:37:12,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:37:12,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:12,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:37:12,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:37:12,231 INFO L87 Difference]: Start difference. First operand 37604 states and 146310 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) Received shutdown request... [2021-06-05 16:37:12,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:37:13,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5883 [2021-06-05 16:37:13,016 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:37:13,018 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:37:13,019 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:37:13,020 INFO L202 PluginConnector]: Adding new model dot-product.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:37:13 BasicIcfg [2021-06-05 16:37:13,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:37:13,020 INFO L168 Benchmark]: Toolchain (without parser) took 868081.19 ms. Allocated memory was 341.8 MB in the beginning and 3.3 GB in the end (delta: 3.0 GB). Free memory was 321.7 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-06-05 16:37:13,020 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 341.8 MB. Free memory was 322.9 MB in the beginning and 322.8 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:37:13,020 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.63 ms. Allocated memory is still 341.8 MB. Free memory was 321.6 MB in the beginning and 320.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:37:13,020 INFO L168 Benchmark]: Boogie Preprocessor took 14.19 ms. Allocated memory is still 341.8 MB. Free memory was 320.2 MB in the beginning and 319.2 MB in the end (delta: 978.3 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 16:37:13,020 INFO L168 Benchmark]: RCFGBuilder took 203.26 ms. Allocated memory is still 341.8 MB. Free memory was 319.1 MB in the beginning and 305.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 16:37:13,020 INFO L168 Benchmark]: TraceAbstraction took 867841.65 ms. Allocated memory was 341.8 MB in the beginning and 3.3 GB in the end (delta: 3.0 GB). Free memory was 305.4 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. [2021-06-05 16:37:13,021 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 0.11 ms. Allocated memory is still 341.8 MB. Free memory was 322.9 MB in the beginning and 322.8 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.63 ms. Allocated memory is still 341.8 MB. Free memory was 321.6 MB in the beginning and 320.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.19 ms. Allocated memory is still 341.8 MB. Free memory was 320.2 MB in the beginning and 319.2 MB in the end (delta: 978.3 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 203.26 ms. Allocated memory is still 341.8 MB. Free memory was 319.1 MB in the beginning and 305.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 867841.65 ms. Allocated memory was 341.8 MB in the beginning and 3.3 GB in the end (delta: 3.0 GB). Free memory was 305.4 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 1.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (37604states) and FLOYD_HOARE automaton (currently 49 states, 15 states before enhancement),while ReachableStatesComputation was computing reachable states (2836 states constructedinput type IntersectNwa). - 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 constructing difference of abstraction (37604states) and FLOYD_HOARE automaton (currently 49 states, 15 states before enhancement),while ReachableStatesComputation was computing reachable states (2836 states constructedinput type IntersectNwa). - 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 constructing difference of abstraction (37604states) and FLOYD_HOARE automaton (currently 49 states, 15 states before enhancement),while ReachableStatesComputation was computing reachable states (2836 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (37604states) and FLOYD_HOARE automaton (currently 49 states, 15 states before enhancement),while ReachableStatesComputation was computing reachable states (2836 states constructedinput type IntersectNwa). - 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: 867707.9ms, OverallIterations: 229, TraceHistogramMax: 3, EmptinessCheckTime: 2104.7ms, AutomataDifference: 628447.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10236 SDtfs, 57677 SDslu, 74668 SDs, 0 SdLazy, 124357 SolverSat, 10163 SolverUnsat, 260 SolverUnknown, 0 SolverNotchecked, 386008.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14160 GetRequests, 4754 SyntacticMatches, 284 SemanticMatches, 9122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143409 ImplicationChecksByTransitivity, 295505.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37607occurred in iteration=227, InterpolantAutomatonStates: 7951, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 32861.3ms AutomataMinimizationTime, 228 MinimizatonAttempts, 794936 StatesRemovedByMinimization, 228 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 763.3ms SsaConstructionTime, 2064.8ms SatisfiabilityAnalysisTime, 150540.1ms InterpolantComputationTime, 12042 NumberOfCodeBlocks, 12042 NumberOfCodeBlocksAsserted, 780 NumberOfCheckSat, 11587 ConstructedInterpolants, 128 QuantifiedInterpolants, 137926 SizeOfPredicates, 1162 NumberOfNonLiveVariables, 15206 ConjunctsInSsa, 3426 ConjunctsInUnsatCore, 455 InterpolantComputations, 3 PerfectInterpolantSequences, 787/3670 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