/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:06:39,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:06:39,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:06:39,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:06:39,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 20:06:39,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 20:06:39,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 20:06:39,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 20:06:39,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 20:06:39,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 20:06:39,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 20:06:39,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 20:06:39,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 20:06:39,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 20:06:39,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 20:06:39,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 20:06:39,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 20:06:39,782 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:06:39,818 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:06:39,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:06:39,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:06:39,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:06:39,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:06:39,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:06:39,822 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:06:39,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:06:39,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:06:39,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:06:39,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:06:39,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:06:39,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:06:39,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:06:39,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:06:39,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:06:39,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:06:39,824 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:06:39,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:06:39,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:06:39,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:06:39,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:06:39,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:06:39,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:06:39,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:06:39,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:06:39,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:06:39,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:06:39,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:06:39,825 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:06:39,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:06:39,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:06:40,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:06:40,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:06:40,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:06:40,117 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:06:40,118 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:06:40,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2021-07-13 20:06:40,119 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2021-07-13 20:06:40,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:06:40,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:06:40,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:06:40,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:06:40,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:06:40,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:40" (1/1) ... [2021-07-13 20:06:40,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:40" (1/1) ... [2021-07-13 20:06:40,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:06:40,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:06:40,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:06:40,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:06:40,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:40" (1/1) ... [2021-07-13 20:06:40,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:40" (1/1) ... [2021-07-13 20:06:40,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:40" (1/1) ... [2021-07-13 20:06:40,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:40" (1/1) ... [2021-07-13 20:06:40,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:40" (1/1) ... [2021-07-13 20:06:40,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:40" (1/1) ... [2021-07-13 20:06:40,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:40" (1/1) ... [2021-07-13 20:06:40,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:06:40,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:06:40,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:06:40,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:06:40,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:40" (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 [2021-07-13 20:06:40,387 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:06:40,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:06:40,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:06:40,387 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:06:40,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:06:40,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:06:40,388 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:06:40,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:06:40,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:06:40,389 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:06:40,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:06:40,630 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:06:40,632 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:06:40 BoogieIcfgContainer [2021-07-13 20:06:40,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:06:40,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:06:40,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:06:40,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:06:40,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:06:40" (1/2) ... [2021-07-13 20:06:40,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4194f8bc and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:06:40, skipping insertion in model container [2021-07-13 20:06:40,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:06:40" (2/2) ... [2021-07-13 20:06:40,638 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2021-07-13 20:06:40,643 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:06:40,643 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:06:40,643 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:06:40,644 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:06:40,685 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 20:06:40,703 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 20:06:40,718 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:06:40,719 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:06:40,719 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:06:40,719 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:06:40,719 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:06:40,719 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:06:40,719 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:06:40,719 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:06:40,727 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 68 flow [2021-07-13 20:06:40,743 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:06:40,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:40,752 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:40,753 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:40,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1805809892, now seen corresponding path program 1 times [2021-07-13 20:06:40,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:40,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85354391] [2021-07-13 20:06:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:40,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:40,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85354391] [2021-07-13 20:06:40,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85354391] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:40,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:40,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:06:40,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931919453] [2021-07-13 20:06:40,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:06:40,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:40,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:06:40,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:40,974 INFO L87 Difference]: Start difference. First operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 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 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:41,020 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2021-07-13 20:06:41,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:06:41,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 20:06:41,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:41,050 INFO L225 Difference]: With dead ends: 84 [2021-07-13 20:06:41,050 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 20:06:41,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:41,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 20:06:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-07-13 20:06:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 163 transitions. [2021-07-13 20:06:41,106 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 163 transitions. Word has length 15 [2021-07-13 20:06:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:41,107 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 163 transitions. [2021-07-13 20:06:41,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 163 transitions. [2021-07-13 20:06:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:06:41,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:41,110 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:41,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:06:41,111 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:41,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:41,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1644964665, now seen corresponding path program 1 times [2021-07-13 20:06:41,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:41,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629749701] [2021-07-13 20:06:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:41,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:41,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629749701] [2021-07-13 20:06:41,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629749701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:41,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349011245] [2021-07-13 20:06:41,294 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 [2021-07-13 20:06:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:41,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:06:41,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:41,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349011245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:41,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:41,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:06:41,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064217722] [2021-07-13 20:06:41,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:06:41,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:41,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:06:41,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:06:41,550 INFO L87 Difference]: Start difference. First operand 84 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:41,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:41,902 INFO L93 Difference]: Finished difference Result 197 states and 375 transitions. [2021-07-13 20:06:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:06:41,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:06:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:41,905 INFO L225 Difference]: With dead ends: 197 [2021-07-13 20:06:41,905 INFO L226 Difference]: Without dead ends: 188 [2021-07-13 20:06:41,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:06:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-13 20:06:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 113. [2021-07-13 20:06:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 112 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 216 transitions. [2021-07-13 20:06:41,917 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 216 transitions. Word has length 19 [2021-07-13 20:06:41,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:41,917 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 216 transitions. [2021-07-13 20:06:41,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:41,918 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 216 transitions. [2021-07-13 20:06:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:06:41,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:41,919 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:42,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 20:06:42,137 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:42,138 INFO L82 PathProgramCache]: Analyzing trace with hash 424057207, now seen corresponding path program 2 times [2021-07-13 20:06:42,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:42,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763837381] [2021-07-13 20:06:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:42,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:42,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763837381] [2021-07-13 20:06:42,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763837381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:42,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290984987] [2021-07-13 20:06:42,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:42,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:42,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:06:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:42,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290984987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:42,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:42,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 20:06:42,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994980600] [2021-07-13 20:06:42,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:06:42,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:42,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:06:42,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:06:42,420 INFO L87 Difference]: Start difference. First operand 113 states and 216 transitions. Second operand has 12 states, 12 states have (on average 2.75) 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) [2021-07-13 20:06:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:42,673 INFO L93 Difference]: Finished difference Result 233 states and 445 transitions. [2021-07-13 20:06:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:06:42,674 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) 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 19 [2021-07-13 20:06:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:42,675 INFO L225 Difference]: With dead ends: 233 [2021-07-13 20:06:42,675 INFO L226 Difference]: Without dead ends: 224 [2021-07-13 20:06:42,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:06:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-13 20:06:42,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 117. [2021-07-13 20:06:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9655172413793103) internal successors, (228), 116 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 228 transitions. [2021-07-13 20:06:42,685 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 228 transitions. Word has length 19 [2021-07-13 20:06:42,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:42,685 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 228 transitions. [2021-07-13 20:06:42,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) 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) [2021-07-13 20:06:42,686 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 228 transitions. [2021-07-13 20:06:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:06:42,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:42,687 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:42,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:42,901 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:42,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1293234039, now seen corresponding path program 3 times [2021-07-13 20:06:42,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:42,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552009950] [2021-07-13 20:06:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:42,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:42,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552009950] [2021-07-13 20:06:42,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552009950] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:42,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:06:42,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:06:42,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842453027] [2021-07-13 20:06:42,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:06:42,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:06:42,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:42,938 INFO L87 Difference]: Start difference. First operand 117 states and 228 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:42,947 INFO L93 Difference]: Finished difference Result 120 states and 230 transitions. [2021-07-13 20:06:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:06:42,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:06:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:42,948 INFO L225 Difference]: With dead ends: 120 [2021-07-13 20:06:42,948 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 20:06:42,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:06:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 20:06:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-07-13 20:06:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.9327731092436975) internal successors, (230), 119 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 230 transitions. [2021-07-13 20:06:42,964 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 230 transitions. Word has length 19 [2021-07-13 20:06:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:42,965 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 230 transitions. [2021-07-13 20:06:42,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 230 transitions. [2021-07-13 20:06:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:06:42,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:42,966 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:42,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:06:42,967 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:42,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1628191443, now seen corresponding path program 4 times [2021-07-13 20:06:42,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:42,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886215595] [2021-07-13 20:06:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:43,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:43,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886215595] [2021-07-13 20:06:43,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886215595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:43,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780742688] [2021-07-13 20:06:43,123 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 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 [2021-07-13 20:06:43,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:43,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:43,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:06:43,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:43,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780742688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:43,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:43,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:06:43,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200975013] [2021-07-13 20:06:43,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:06:43,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:43,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:06:43,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:06:43,301 INFO L87 Difference]: Start difference. First operand 120 states and 230 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) 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) [2021-07-13 20:06:43,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:43,479 INFO L93 Difference]: Finished difference Result 175 states and 327 transitions. [2021-07-13 20:06:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:06:43,480 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) 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 19 [2021-07-13 20:06:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:43,481 INFO L225 Difference]: With dead ends: 175 [2021-07-13 20:06:43,481 INFO L226 Difference]: Without dead ends: 168 [2021-07-13 20:06:43,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:06:43,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-13 20:06:43,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 114. [2021-07-13 20:06:43,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.920353982300885) internal successors, (217), 113 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 217 transitions. [2021-07-13 20:06:43,485 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 217 transitions. Word has length 19 [2021-07-13 20:06:43,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:43,486 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 217 transitions. [2021-07-13 20:06:43,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) 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) [2021-07-13 20:06:43,486 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 217 transitions. [2021-07-13 20:06:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:06:43,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:43,487 INFO L508 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] [2021-07-13 20:06:43,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:43,711 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:43,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:43,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1114878874, now seen corresponding path program 1 times [2021-07-13 20:06:43,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:43,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754160121] [2021-07-13 20:06:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:43,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:43,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754160121] [2021-07-13 20:06:43,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754160121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:43,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890187635] [2021-07-13 20:06:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:43,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:06:43,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:43,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:06:43,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:43,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:43,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:43,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:06:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:43,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890187635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:43,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:43,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 20:06:43,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853511902] [2021-07-13 20:06:43,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:06:43,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:43,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:06:43,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:06:43,863 INFO L87 Difference]: Start difference. First operand 114 states and 217 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:43,923 INFO L93 Difference]: Finished difference Result 152 states and 292 transitions. [2021-07-13 20:06:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:06:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:06:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:43,925 INFO L225 Difference]: With dead ends: 152 [2021-07-13 20:06:43,925 INFO L226 Difference]: Without dead ends: 152 [2021-07-13 20:06:43,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:06:43,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-13 20:06:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2021-07-13 20:06:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 240 transitions. [2021-07-13 20:06:43,929 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 240 transitions. Word has length 22 [2021-07-13 20:06:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:43,929 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 240 transitions. [2021-07-13 20:06:43,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 240 transitions. [2021-07-13 20:06:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:06:43,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:43,930 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:44,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:44,153 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1319012138, now seen corresponding path program 5 times [2021-07-13 20:06:44,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:44,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46689738] [2021-07-13 20:06:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:44,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:44,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46689738] [2021-07-13 20:06:44,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46689738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:44,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112245548] [2021-07-13 20:06:44,211 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 [2021-07-13 20:06:44,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:06:44,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:44,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:06:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:44,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112245548] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:06:44,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:06:44,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-07-13 20:06:44,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048180987] [2021-07-13 20:06:44,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:06:44,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:44,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:06:44,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:44,326 INFO L87 Difference]: Start difference. First operand 122 states and 240 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:44,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:44,337 INFO L93 Difference]: Finished difference Result 288 states and 559 transitions. [2021-07-13 20:06:44,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:06:44,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:06:44,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:44,339 INFO L225 Difference]: With dead ends: 288 [2021-07-13 20:06:44,339 INFO L226 Difference]: Without dead ends: 257 [2021-07-13 20:06:44,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:06:44,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-13 20:06:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 223. [2021-07-13 20:06:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.045045045045045) internal successors, (454), 222 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 454 transitions. [2021-07-13 20:06:44,348 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 454 transitions. Word has length 23 [2021-07-13 20:06:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:44,349 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 454 transitions. [2021-07-13 20:06:44,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 454 transitions. [2021-07-13 20:06:44,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:44,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:44,351 INFO L508 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] [2021-07-13 20:06:44,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 20:06:44,574 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:44,574 INFO L82 PathProgramCache]: Analyzing trace with hash 543374211, now seen corresponding path program 2 times [2021-07-13 20:06:44,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:44,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455363554] [2021-07-13 20:06:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:44,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:44,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455363554] [2021-07-13 20:06:44,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455363554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:44,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948615987] [2021-07-13 20:06:44,750 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 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 [2021-07-13 20:06:44,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:44,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:44,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:44,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:44,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:06:44,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:44,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:44,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:44,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:44,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948615987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:44,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:44,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-07-13 20:06:44,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021708198] [2021-07-13 20:06:44,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:06:44,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:06:44,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:06:44,973 INFO L87 Difference]: Start difference. First operand 223 states and 454 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) 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) [2021-07-13 20:06:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:45,481 INFO L93 Difference]: Finished difference Result 313 states and 606 transitions. [2021-07-13 20:06:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:06:45,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) 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 [2021-07-13 20:06:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:45,483 INFO L225 Difference]: With dead ends: 313 [2021-07-13 20:06:45,483 INFO L226 Difference]: Without dead ends: 281 [2021-07-13 20:06:45,484 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 483.9ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:06:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-07-13 20:06:45,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 246. [2021-07-13 20:06:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0081632653061225) internal successors, (492), 245 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 492 transitions. [2021-07-13 20:06:45,490 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 492 transitions. Word has length 26 [2021-07-13 20:06:45,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:45,491 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 492 transitions. [2021-07-13 20:06:45,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) 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) [2021-07-13 20:06:45,491 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 492 transitions. [2021-07-13 20:06:45,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:45,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:45,492 INFO L508 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] [2021-07-13 20:06:45,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:45,701 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1138730303, now seen corresponding path program 3 times [2021-07-13 20:06:45,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:45,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177014200] [2021-07-13 20:06:45,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:45,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:45,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177014200] [2021-07-13 20:06:45,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177014200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:45,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297463097] [2021-07-13 20:06:45,905 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 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 [2021-07-13 20:06:45,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:06:45,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:45,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:45,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:46,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:06:46,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:46,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:46,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:46,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:46,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297463097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:46,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:46,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:06:46,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260187729] [2021-07-13 20:06:46,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:06:46,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:46,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:06:46,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:06:46,218 INFO L87 Difference]: Start difference. First operand 246 states and 492 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) 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) [2021-07-13 20:06:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:46,829 INFO L93 Difference]: Finished difference Result 346 states and 668 transitions. [2021-07-13 20:06:46,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:06:46,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) 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 [2021-07-13 20:06:46,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:46,831 INFO L225 Difference]: With dead ends: 346 [2021-07-13 20:06:46,831 INFO L226 Difference]: Without dead ends: 314 [2021-07-13 20:06:46,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:06:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-07-13 20:06:46,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 252. [2021-07-13 20:06:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.0199203187250996) internal successors, (507), 251 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 507 transitions. [2021-07-13 20:06:46,839 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 507 transitions. Word has length 26 [2021-07-13 20:06:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:46,839 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 507 transitions. [2021-07-13 20:06:46,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) 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) [2021-07-13 20:06:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 507 transitions. [2021-07-13 20:06:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:46,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:46,840 INFO L508 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] [2021-07-13 20:06:47,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:47,049 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:47,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1169241475, now seen corresponding path program 4 times [2021-07-13 20:06:47,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:47,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589568684] [2021-07-13 20:06:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:47,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:47,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589568684] [2021-07-13 20:06:47,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589568684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:47,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265526134] [2021-07-13 20:06:47,223 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 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 [2021-07-13 20:06:47,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:47,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:47,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:47,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:06:47,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:47,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:47,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:47,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:47,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265526134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:47,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:47,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:06:47,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180723754] [2021-07-13 20:06:47,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:06:47,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:47,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:06:47,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:06:47,530 INFO L87 Difference]: Start difference. First operand 252 states and 507 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) 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) [2021-07-13 20:06:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:48,176 INFO L93 Difference]: Finished difference Result 365 states and 705 transitions. [2021-07-13 20:06:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:06:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) 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 [2021-07-13 20:06:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:48,178 INFO L225 Difference]: With dead ends: 365 [2021-07-13 20:06:48,178 INFO L226 Difference]: Without dead ends: 333 [2021-07-13 20:06:48,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 571.5ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:06:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-07-13 20:06:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 253. [2021-07-13 20:06:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0198412698412698) internal successors, (509), 252 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:48,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 509 transitions. [2021-07-13 20:06:48,187 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 509 transitions. Word has length 26 [2021-07-13 20:06:48,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:48,187 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 509 transitions. [2021-07-13 20:06:48,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) 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) [2021-07-13 20:06:48,187 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 509 transitions. [2021-07-13 20:06:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:48,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:48,188 INFO L508 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] [2021-07-13 20:06:48,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:06:48,397 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:48,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483455, now seen corresponding path program 5 times [2021-07-13 20:06:48,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:48,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853052221] [2021-07-13 20:06:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:48,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:48,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853052221] [2021-07-13 20:06:48,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853052221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:48,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456906578] [2021-07-13 20:06:48,551 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 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 [2021-07-13 20:06:48,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:48,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:48,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:48,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:48,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 20:06:48,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:48,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:48,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:48,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-13 20:06:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:48,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456906578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:48,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:48,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:06:48,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493139865] [2021-07-13 20:06:48,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:06:48,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:48,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:06:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:06:48,845 INFO L87 Difference]: Start difference. First operand 253 states and 509 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) 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) [2021-07-13 20:06:49,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:49,640 INFO L93 Difference]: Finished difference Result 405 states and 784 transitions. [2021-07-13 20:06:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:06:49,641 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) 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 [2021-07-13 20:06:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:49,644 INFO L225 Difference]: With dead ends: 405 [2021-07-13 20:06:49,645 INFO L226 Difference]: Without dead ends: 373 [2021-07-13 20:06:49,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 677.4ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:06:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-07-13 20:06:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 257. [2021-07-13 20:06:49,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.015625) internal successors, (516), 256 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 516 transitions. [2021-07-13 20:06:49,654 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 516 transitions. Word has length 26 [2021-07-13 20:06:49,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:49,654 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 516 transitions. [2021-07-13 20:06:49,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) 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) [2021-07-13 20:06:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 516 transitions. [2021-07-13 20:06:49,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:49,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:49,657 INFO L508 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] [2021-07-13 20:06:49,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:49,880 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:49,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1848637673, now seen corresponding path program 6 times [2021-07-13 20:06:49,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:49,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124238342] [2021-07-13 20:06:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:50,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:50,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124238342] [2021-07-13 20:06:50,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124238342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:50,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019774865] [2021-07-13 20:06:50,066 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 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 [2021-07-13 20:06:50,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:06:50,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:50,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:06:50,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:50,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 20:06:50,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:50,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:50,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:50,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-07-13 20:06:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:50,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019774865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:50,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:50,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:06:50,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968206071] [2021-07-13 20:06:50,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:50,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:50,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:50,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:50,344 INFO L87 Difference]: Start difference. First operand 257 states and 516 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-07-13 20:06:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:50,881 INFO L93 Difference]: Finished difference Result 321 states and 632 transitions. [2021-07-13 20:06:50,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:06:50,881 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 [2021-07-13 20:06:50,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:50,883 INFO L225 Difference]: With dead ends: 321 [2021-07-13 20:06:50,883 INFO L226 Difference]: Without dead ends: 293 [2021-07-13 20:06:50,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:06:50,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-13 20:06:50,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 260. [2021-07-13 20:06:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.011583011583012) internal successors, (521), 259 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 521 transitions. [2021-07-13 20:06:50,891 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 521 transitions. Word has length 26 [2021-07-13 20:06:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:50,891 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 521 transitions. [2021-07-13 20:06:50,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-07-13 20:06:50,891 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 521 transitions. [2021-07-13 20:06:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:50,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:50,892 INFO L508 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] [2021-07-13 20:06:51,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:51,115 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:51,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:51,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2081701755, now seen corresponding path program 7 times [2021-07-13 20:06:51,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:51,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88849004] [2021-07-13 20:06:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:51,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:51,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:51,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88849004] [2021-07-13 20:06:51,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88849004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:51,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371149230] [2021-07-13 20:06:51,258 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 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 [2021-07-13 20:06:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:51,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:51,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:51,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 20:06:51,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:51,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:51,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:51,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-13 20:06:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:51,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371149230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:51,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:51,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:06:51,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239600366] [2021-07-13 20:06:51,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:51,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:51,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:51,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:51,547 INFO L87 Difference]: Start difference. First operand 260 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-07-13 20:06:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:52,114 INFO L93 Difference]: Finished difference Result 349 states and 677 transitions. [2021-07-13 20:06:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:06:52,115 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 [2021-07-13 20:06:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:52,117 INFO L225 Difference]: With dead ends: 349 [2021-07-13 20:06:52,117 INFO L226 Difference]: Without dead ends: 317 [2021-07-13 20:06:52,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 552.9ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:06:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-07-13 20:06:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2021-07-13 20:06:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.0186567164179103) internal successors, (541), 268 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 541 transitions. [2021-07-13 20:06:52,124 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 541 transitions. Word has length 26 [2021-07-13 20:06:52,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:52,124 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 541 transitions. [2021-07-13 20:06:52,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-07-13 20:06:52,125 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 541 transitions. [2021-07-13 20:06:52,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:52,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:52,125 INFO L508 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] [2021-07-13 20:06:52,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 20:06:52,349 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:52,349 INFO L82 PathProgramCache]: Analyzing trace with hash 226270023, now seen corresponding path program 8 times [2021-07-13 20:06:52,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:52,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304958997] [2021-07-13 20:06:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:52,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:52,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304958997] [2021-07-13 20:06:52,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304958997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:52,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140720515] [2021-07-13 20:06:52,507 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 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 [2021-07-13 20:06:52,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:52,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:52,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:52,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:52,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:06:52,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:52,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:52,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:52,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:52,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140720515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:52,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:52,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:06:52,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364487494] [2021-07-13 20:06:52,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:52,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:52,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:52,782 INFO L87 Difference]: Start difference. First operand 269 states and 541 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-07-13 20:06:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:53,238 INFO L93 Difference]: Finished difference Result 386 states and 744 transitions. [2021-07-13 20:06:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:06:53,239 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 [2021-07-13 20:06:53,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:53,240 INFO L225 Difference]: With dead ends: 386 [2021-07-13 20:06:53,240 INFO L226 Difference]: Without dead ends: 354 [2021-07-13 20:06:53,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 504.8ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:06:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-13 20:06:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 270. [2021-07-13 20:06:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.0185873605947955) internal successors, (543), 269 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 543 transitions. [2021-07-13 20:06:53,248 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 543 transitions. Word has length 26 [2021-07-13 20:06:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:53,248 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 543 transitions. [2021-07-13 20:06:53,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-07-13 20:06:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 543 transitions. [2021-07-13 20:06:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:53,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:53,249 INFO L508 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] [2021-07-13 20:06:53,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:06:53,461 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1652512389, now seen corresponding path program 9 times [2021-07-13 20:06:53,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:53,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241925381] [2021-07-13 20:06:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:53,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:53,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241925381] [2021-07-13 20:06:53,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241925381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:53,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036937443] [2021-07-13 20:06:53,660 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 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 [2021-07-13 20:06:53,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:06:53,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:53,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:53,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 20:06:53,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:53,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:53,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:53,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-07-13 20:06:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:53,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036937443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:53,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:53,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:06:53,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455066396] [2021-07-13 20:06:53,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:53,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:53,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:53,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:53,913 INFO L87 Difference]: Start difference. First operand 270 states and 543 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-07-13 20:06:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:54,653 INFO L93 Difference]: Finished difference Result 429 states and 828 transitions. [2021-07-13 20:06:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:06:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 [2021-07-13 20:06:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:54,655 INFO L225 Difference]: With dead ends: 429 [2021-07-13 20:06:54,655 INFO L226 Difference]: Without dead ends: 397 [2021-07-13 20:06:54,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 611.0ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:06:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-13 20:06:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 267. [2021-07-13 20:06:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.007518796992481) internal successors, (534), 266 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 534 transitions. [2021-07-13 20:06:54,662 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 534 transitions. Word has length 26 [2021-07-13 20:06:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:54,663 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 534 transitions. [2021-07-13 20:06:54,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-07-13 20:06:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 534 transitions. [2021-07-13 20:06:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:54,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:54,664 INFO L508 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] [2021-07-13 20:06:54,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:06:54,886 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash 632062879, now seen corresponding path program 10 times [2021-07-13 20:06:54,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:54,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089723233] [2021-07-13 20:06:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:55,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:55,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089723233] [2021-07-13 20:06:55,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089723233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:55,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010723834] [2021-07-13 20:06:55,023 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 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 [2021-07-13 20:06:55,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:06:55,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:55,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:55,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:55,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:06:55,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:55,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:55,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:55,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:06:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:55,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010723834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:55,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:55,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:06:55,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596695821] [2021-07-13 20:06:55,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:55,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:55,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:55,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:55,329 INFO L87 Difference]: Start difference. First operand 267 states and 534 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-07-13 20:06:55,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:55,806 INFO L93 Difference]: Finished difference Result 331 states and 650 transitions. [2021-07-13 20:06:55,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:06:55,806 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 [2021-07-13 20:06:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:55,808 INFO L225 Difference]: With dead ends: 331 [2021-07-13 20:06:55,808 INFO L226 Difference]: Without dead ends: 303 [2021-07-13 20:06:55,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 585.3ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:06:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-13 20:06:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 263. [2021-07-13 20:06:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.0076335877862594) internal successors, (526), 262 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 526 transitions. [2021-07-13 20:06:55,814 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 526 transitions. Word has length 26 [2021-07-13 20:06:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:55,814 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 526 transitions. [2021-07-13 20:06:55,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-07-13 20:06:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 526 transitions. [2021-07-13 20:06:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:55,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:55,815 INFO L508 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] [2021-07-13 20:06:56,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:56,038 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1575102459, now seen corresponding path program 11 times [2021-07-13 20:06:56,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:56,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384156872] [2021-07-13 20:06:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:56,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:56,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384156872] [2021-07-13 20:06:56,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384156872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:56,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737831094] [2021-07-13 20:06:56,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:06:56,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:06:56,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:56,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:56,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:56,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:06:56,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:56,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:56,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:56,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:56,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737831094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:56,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:56,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:06:56,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732284205] [2021-07-13 20:06:56,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:06:56,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:56,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:06:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:06:56,470 INFO L87 Difference]: Start difference. First operand 263 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2021-07-13 20:06:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:56,999 INFO L93 Difference]: Finished difference Result 355 states and 687 transitions. [2021-07-13 20:06:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:06:57,000 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 [2021-07-13 20:06:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:57,001 INFO L225 Difference]: With dead ends: 355 [2021-07-13 20:06:57,001 INFO L226 Difference]: Without dead ends: 323 [2021-07-13 20:06:57,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 526.0ms TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:06:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-07-13 20:06:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 275. [2021-07-13 20:06:57,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.010948905109489) internal successors, (551), 274 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 551 transitions. [2021-07-13 20:06:57,007 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 551 transitions. Word has length 26 [2021-07-13 20:06:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:57,007 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 551 transitions. [2021-07-13 20:06:57,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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) [2021-07-13 20:06:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 551 transitions. [2021-07-13 20:06:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:57,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:57,008 INFO L508 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] [2021-07-13 20:06:57,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:06:57,225 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash -411893059, now seen corresponding path program 12 times [2021-07-13 20:06:57,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:57,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379817637] [2021-07-13 20:06:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:57,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:57,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379817637] [2021-07-13 20:06:57,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379817637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:57,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398447636] [2021-07-13 20:06:57,371 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 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 [2021-07-13 20:06:57,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:06:57,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:57,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:57,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:57,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:06:57,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:57,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:57,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:57,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:57,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398447636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:57,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:57,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:06:57,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619187177] [2021-07-13 20:06:57,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:57,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:57,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:57,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:57,623 INFO L87 Difference]: Start difference. First operand 275 states and 551 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:06:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:58,213 INFO L93 Difference]: Finished difference Result 392 states and 754 transitions. [2021-07-13 20:06:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:06:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 [2021-07-13 20:06:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:58,215 INFO L225 Difference]: With dead ends: 392 [2021-07-13 20:06:58,215 INFO L226 Difference]: Without dead ends: 360 [2021-07-13 20:06:58,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 517.5ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:06:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-07-13 20:06:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-07-13 20:06:58,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.0109090909090908) internal successors, (553), 275 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 553 transitions. [2021-07-13 20:06:58,222 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 553 transitions. Word has length 26 [2021-07-13 20:06:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:58,222 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 553 transitions. [2021-07-13 20:06:58,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:06:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 553 transitions. [2021-07-13 20:06:58,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:58,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:58,223 INFO L508 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] [2021-07-13 20:06:58,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:06:58,437 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:58,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:58,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1014349307, now seen corresponding path program 13 times [2021-07-13 20:06:58,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:58,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654589233] [2021-07-13 20:06:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:58,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:58,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654589233] [2021-07-13 20:06:58,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654589233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:58,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608831514] [2021-07-13 20:06:58,578 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 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 [2021-07-13 20:06:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:58,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:06:58,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:58,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:06:58,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:06:58,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:06:58,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:06:58,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:06:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:58,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608831514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:58,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:58,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:06:58,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645816551] [2021-07-13 20:06:58,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:06:58,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:06:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:06:58,839 INFO L87 Difference]: Start difference. First operand 276 states and 553 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:06:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:59,619 INFO L93 Difference]: Finished difference Result 435 states and 838 transitions. [2021-07-13 20:06:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:06:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 [2021-07-13 20:06:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:59,621 INFO L225 Difference]: With dead ends: 435 [2021-07-13 20:06:59,621 INFO L226 Difference]: Without dead ends: 403 [2021-07-13 20:06:59,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 633.4ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:06:59,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-13 20:06:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 273. [2021-07-13 20:06:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.0) internal successors, (544), 272 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2021-07-13 20:06:59,627 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 26 [2021-07-13 20:06:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:59,627 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2021-07-13 20:06:59,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:06:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2021-07-13 20:06:59,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:06:59,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:59,628 INFO L508 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] [2021-07-13 20:06:59,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:59,852 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:59,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:59,852 INFO L82 PathProgramCache]: Analyzing trace with hash -6100203, now seen corresponding path program 14 times [2021-07-13 20:06:59,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:59,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17456128] [2021-07-13 20:06:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:00,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:00,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17456128] [2021-07-13 20:07:00,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17456128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:00,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444911900] [2021-07-13 20:07:00,005 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 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 [2021-07-13 20:07:00,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:00,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:00,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:07:00,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:00,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:07:00,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:00,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:00,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:00,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:00,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444911900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:00,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:00,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:07:00,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049142765] [2021-07-13 20:07:00,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:07:00,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:00,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:07:00,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:07:00,269 INFO L87 Difference]: Start difference. First operand 273 states and 544 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:07:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:00,719 INFO L93 Difference]: Finished difference Result 337 states and 660 transitions. [2021-07-13 20:07:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:07:00,720 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 [2021-07-13 20:07:00,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:00,721 INFO L225 Difference]: With dead ends: 337 [2021-07-13 20:07:00,721 INFO L226 Difference]: Without dead ends: 309 [2021-07-13 20:07:00,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:07:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-07-13 20:07:00,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 266. [2021-07-13 20:07:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.0037735849056606) internal successors, (531), 265 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 531 transitions. [2021-07-13 20:07:00,727 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 531 transitions. Word has length 26 [2021-07-13 20:07:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:00,727 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 531 transitions. [2021-07-13 20:07:00,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:07:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 531 transitions. [2021-07-13 20:07:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:07:00,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:00,728 INFO L508 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] [2021-07-13 20:07:00,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:00,945 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:00,945 INFO L82 PathProgramCache]: Analyzing trace with hash 942965637, now seen corresponding path program 15 times [2021-07-13 20:07:00,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:00,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627856288] [2021-07-13 20:07:00,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:01,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:01,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627856288] [2021-07-13 20:07:01,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627856288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:01,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008674768] [2021-07-13 20:07:01,096 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 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 [2021-07-13 20:07:01,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:07:01,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:01,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:07:01,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:01,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:07:01,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:01,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:01,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:01,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:01,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008674768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:01,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:01,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:07:01,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047505715] [2021-07-13 20:07:01,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:07:01,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:01,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:07:01,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:07:01,347 INFO L87 Difference]: Start difference. First operand 266 states and 531 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:07:01,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:01,908 INFO L93 Difference]: Finished difference Result 343 states and 661 transitions. [2021-07-13 20:07:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:07:01,909 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 [2021-07-13 20:07:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:01,910 INFO L225 Difference]: With dead ends: 343 [2021-07-13 20:07:01,910 INFO L226 Difference]: Without dead ends: 311 [2021-07-13 20:07:01,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 506.2ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:07:01,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-13 20:07:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 263. [2021-07-13 20:07:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.00381679389313) internal successors, (525), 262 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 525 transitions. [2021-07-13 20:07:01,916 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 525 transitions. Word has length 26 [2021-07-13 20:07:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:01,916 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 525 transitions. [2021-07-13 20:07:01,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:07:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 525 transitions. [2021-07-13 20:07:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:07:01,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:01,917 INFO L508 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] [2021-07-13 20:07:02,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:02,139 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:02,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1044029881, now seen corresponding path program 16 times [2021-07-13 20:07:02,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:02,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418123577] [2021-07-13 20:07:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:02,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:02,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418123577] [2021-07-13 20:07:02,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418123577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:02,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824819589] [2021-07-13 20:07:02,294 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:02,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:02,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:02,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:07:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:02,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:07:02,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:02,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:02,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:02,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:02,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824819589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:02,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:02,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:07:02,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119804600] [2021-07-13 20:07:02,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:07:02,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:02,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:07:02,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:07:02,579 INFO L87 Difference]: Start difference. First operand 263 states and 525 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:07:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:03,051 INFO L93 Difference]: Finished difference Result 378 states and 724 transitions. [2021-07-13 20:07:03,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:07:03,051 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 [2021-07-13 20:07:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:03,052 INFO L225 Difference]: With dead ends: 378 [2021-07-13 20:07:03,052 INFO L226 Difference]: Without dead ends: 346 [2021-07-13 20:07:03,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 534.3ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:07:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-07-13 20:07:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 264. [2021-07-13 20:07:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.0038022813688214) internal successors, (527), 263 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 527 transitions. [2021-07-13 20:07:03,059 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 527 transitions. Word has length 26 [2021-07-13 20:07:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:03,059 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 527 transitions. [2021-07-13 20:07:03,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:07:03,059 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 527 transitions. [2021-07-13 20:07:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:07:03,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:03,060 INFO L508 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] [2021-07-13 20:07:03,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:07:03,273 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:03,273 INFO L82 PathProgramCache]: Analyzing trace with hash 382212485, now seen corresponding path program 17 times [2021-07-13 20:07:03,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:03,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649760260] [2021-07-13 20:07:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:03,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:03,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649760260] [2021-07-13 20:07:03,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649760260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:03,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348084287] [2021-07-13 20:07:03,421 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 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 [2021-07-13 20:07:03,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:03,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:03,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:07:03,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:03,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:07:03,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:03,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:03,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:03,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:03,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348084287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:03,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:03,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:07:03,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402386936] [2021-07-13 20:07:03,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:07:03,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:03,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:07:03,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:07:03,677 INFO L87 Difference]: Start difference. First operand 264 states and 527 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:07:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:04,365 INFO L93 Difference]: Finished difference Result 410 states and 786 transitions. [2021-07-13 20:07:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:07:04,365 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 [2021-07-13 20:07:04,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:04,367 INFO L225 Difference]: With dead ends: 410 [2021-07-13 20:07:04,367 INFO L226 Difference]: Without dead ends: 378 [2021-07-13 20:07:04,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 608.4ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:07:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-07-13 20:07:04,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 255. [2021-07-13 20:07:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.9921259842519685) internal successors, (506), 254 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:04,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 506 transitions. [2021-07-13 20:07:04,379 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 506 transitions. Word has length 26 [2021-07-13 20:07:04,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:04,380 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 506 transitions. [2021-07-13 20:07:04,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:07:04,380 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 506 transitions. [2021-07-13 20:07:04,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:07:04,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:04,381 INFO L508 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] [2021-07-13 20:07:04,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:07:04,595 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:04,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:04,595 INFO L82 PathProgramCache]: Analyzing trace with hash -638237025, now seen corresponding path program 18 times [2021-07-13 20:07:04,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:04,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386097681] [2021-07-13 20:07:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:04,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:04,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386097681] [2021-07-13 20:07:04,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386097681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:04,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803309566] [2021-07-13 20:07:04,727 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 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 [2021-07-13 20:07:04,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 20:07:04,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:04,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:07:04,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:04,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:07:04,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:04,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:04,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:04,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:07:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:04,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803309566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:04,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:04,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:07:04,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812370070] [2021-07-13 20:07:04,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:07:04,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:07:04,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:07:04,968 INFO L87 Difference]: Start difference. First operand 255 states and 506 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:07:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:05,460 INFO L93 Difference]: Finished difference Result 307 states and 598 transitions. [2021-07-13 20:07:05,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:07:05,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 [2021-07-13 20:07:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:05,461 INFO L225 Difference]: With dead ends: 307 [2021-07-13 20:07:05,461 INFO L226 Difference]: Without dead ends: 279 [2021-07-13 20:07:05,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:07:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-13 20:07:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 233. [2021-07-13 20:07:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0) internal successors, (464), 232 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2021-07-13 20:07:05,466 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 26 [2021-07-13 20:07:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:05,466 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2021-07-13 20:07:05,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-07-13 20:07:05,466 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2021-07-13 20:07:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:07:05,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:05,467 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:05,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:05,673 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:05,673 INFO L82 PathProgramCache]: Analyzing trace with hash 480945784, now seen corresponding path program 19 times [2021-07-13 20:07:05,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:05,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432797723] [2021-07-13 20:07:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:05,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:05,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432797723] [2021-07-13 20:07:05,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432797723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:05,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4574828] [2021-07-13 20:07:05,761 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:05,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:07:05,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:05,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:07:05,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:05,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:05,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:05,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:07:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:05,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4574828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:05,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:05,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:07:05,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57438380] [2021-07-13 20:07:05,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:07:05,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:05,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:07:05,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:07:05,857 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:06,054 INFO L93 Difference]: Finished difference Result 362 states and 698 transitions. [2021-07-13 20:07:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:07:06,055 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:07:06,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:06,056 INFO L225 Difference]: With dead ends: 362 [2021-07-13 20:07:06,056 INFO L226 Difference]: Without dead ends: 362 [2021-07-13 20:07:06,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:07:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-07-13 20:07:06,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2021-07-13 20:07:06,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.970464135021097) internal successors, (467), 237 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 467 transitions. [2021-07-13 20:07:06,064 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 467 transitions. Word has length 29 [2021-07-13 20:07:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:06,064 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 467 transitions. [2021-07-13 20:07:06,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 467 transitions. [2021-07-13 20:07:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:07:06,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:06,065 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:06,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:07:06,288 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:06,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:06,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1371755552, now seen corresponding path program 20 times [2021-07-13 20:07:06,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:06,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540995195] [2021-07-13 20:07:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:06,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:06,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540995195] [2021-07-13 20:07:06,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540995195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:06,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436727112] [2021-07-13 20:07:06,321 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 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 [2021-07-13 20:07:06,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:06,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:06,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:07:06,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:06,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436727112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:06,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:06,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:07:06,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820081179] [2021-07-13 20:07:06,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:07:06,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:06,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:07:06,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:07:06,394 INFO L87 Difference]: Start difference. First operand 238 states and 467 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-07-13 20:07:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:06,408 INFO L93 Difference]: Finished difference Result 534 states and 1045 transitions. [2021-07-13 20:07:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:07:06,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 30 [2021-07-13 20:07:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:06,410 INFO L225 Difference]: With dead ends: 534 [2021-07-13 20:07:06,410 INFO L226 Difference]: Without dead ends: 491 [2021-07-13 20:07:06,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:07:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-13 20:07:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 411. [2021-07-13 20:07:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0634146341463415) internal successors, (846), 410 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 846 transitions. [2021-07-13 20:07:06,425 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 846 transitions. Word has length 30 [2021-07-13 20:07:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:06,425 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 846 transitions. [2021-07-13 20:07:06,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-07-13 20:07:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 846 transitions. [2021-07-13 20:07:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:06,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:06,426 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:06,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:06,641 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1245561707, now seen corresponding path program 21 times [2021-07-13 20:07:06,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:06,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724446963] [2021-07-13 20:07:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:06,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:06,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724446963] [2021-07-13 20:07:06,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724446963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:06,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925387304] [2021-07-13 20:07:06,977 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 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 [2021-07-13 20:07:07,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:07:07,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:07,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:07,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:07,232 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:07,232 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 25 treesize of output 13 [2021-07-13 20:07:07,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:07,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:07,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:07,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:07:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:07,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925387304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:07,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:07,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 26 [2021-07-13 20:07:07,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411132846] [2021-07-13 20:07:07,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:07:07,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:07:07,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:07:07,381 INFO L87 Difference]: Start difference. First operand 411 states and 846 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:08,274 INFO L93 Difference]: Finished difference Result 550 states and 1089 transitions. [2021-07-13 20:07:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:07:08,274 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:08,275 INFO L225 Difference]: With dead ends: 550 [2021-07-13 20:07:08,275 INFO L226 Difference]: Without dead ends: 502 [2021-07-13 20:07:08,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 941.3ms TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:07:08,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-13 20:07:08,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 428. [2021-07-13 20:07:08,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.0468384074941453) internal successors, (874), 427 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 874 transitions. [2021-07-13 20:07:08,286 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 874 transitions. Word has length 33 [2021-07-13 20:07:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:08,286 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 874 transitions. [2021-07-13 20:07:08,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 874 transitions. [2021-07-13 20:07:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:08,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:08,288 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:08,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:07:08,501 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:08,501 INFO L82 PathProgramCache]: Analyzing trace with hash -482243373, now seen corresponding path program 22 times [2021-07-13 20:07:08,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:08,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661869011] [2021-07-13 20:07:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:08,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:08,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661869011] [2021-07-13 20:07:08,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661869011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:08,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694956288] [2021-07-13 20:07:08,773 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 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 [2021-07-13 20:07:08,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:08,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:08,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:09,033 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:07:09,034 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 29 treesize of output 13 [2021-07-13 20:07:09,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:09,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:09,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:09,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:07:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:09,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694956288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:09,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:09,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-07-13 20:07:09,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489048906] [2021-07-13 20:07:09,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:07:09,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:09,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:07:09,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:07:09,172 INFO L87 Difference]: Start difference. First operand 428 states and 874 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:10,265 INFO L93 Difference]: Finished difference Result 574 states and 1136 transitions. [2021-07-13 20:07:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:07:10,265 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:10,267 INFO L225 Difference]: With dead ends: 574 [2021-07-13 20:07:10,267 INFO L226 Difference]: Without dead ends: 526 [2021-07-13 20:07:10,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 954.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:07:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-13 20:07:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 434. [2021-07-13 20:07:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0531177829099305) internal successors, (889), 433 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 889 transitions. [2021-07-13 20:07:10,274 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 889 transitions. Word has length 33 [2021-07-13 20:07:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:10,274 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 889 transitions. [2021-07-13 20:07:10,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 889 transitions. [2021-07-13 20:07:10,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:10,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:10,275 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:10,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:10,484 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash 797128341, now seen corresponding path program 23 times [2021-07-13 20:07:10,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:10,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897768801] [2021-07-13 20:07:10,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:10,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:10,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897768801] [2021-07-13 20:07:10,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897768801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:10,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230929596] [2021-07-13 20:07:10,790 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 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 [2021-07-13 20:07:10,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:07:10,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:10,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:10,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:11,081 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:11,081 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 25 treesize of output 13 [2021-07-13 20:07:11,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:11,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:11,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:11,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:07:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:11,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230929596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:11,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:11,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 20:07:11,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145139107] [2021-07-13 20:07:11,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:07:11,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:11,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:07:11,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:07:11,267 INFO L87 Difference]: Start difference. First operand 434 states and 889 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:12,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:12,255 INFO L93 Difference]: Finished difference Result 599 states and 1183 transitions. [2021-07-13 20:07:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:07:12,256 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:12,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:12,257 INFO L225 Difference]: With dead ends: 599 [2021-07-13 20:07:12,257 INFO L226 Difference]: Without dead ends: 551 [2021-07-13 20:07:12,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1056.0ms TimeCoverageRelationStatistics Valid=224, Invalid=2226, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:07:12,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-07-13 20:07:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 435. [2021-07-13 20:07:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.052995391705069) internal successors, (891), 434 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 891 transitions. [2021-07-13 20:07:12,264 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 891 transitions. Word has length 33 [2021-07-13 20:07:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:12,265 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 891 transitions. [2021-07-13 20:07:12,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:12,265 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 891 transitions. [2021-07-13 20:07:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:12,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:12,266 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:12,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:07:12,469 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:12,470 INFO L82 PathProgramCache]: Analyzing trace with hash -2112216365, now seen corresponding path program 24 times [2021-07-13 20:07:12,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:12,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559739870] [2021-07-13 20:07:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:12,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:12,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559739870] [2021-07-13 20:07:12,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559739870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:12,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047313731] [2021-07-13 20:07:12,759 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 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 [2021-07-13 20:07:12,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:07:12,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:12,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:12,999 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:13,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:07:13,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:13,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:13,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:13,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:07:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:13,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047313731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:13,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:13,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-07-13 20:07:13,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411545021] [2021-07-13 20:07:13,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:07:13,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:13,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:07:13,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:07:13,134 INFO L87 Difference]: Start difference. First operand 435 states and 891 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:14,352 INFO L93 Difference]: Finished difference Result 637 states and 1261 transitions. [2021-07-13 20:07:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:07:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:14,354 INFO L225 Difference]: With dead ends: 637 [2021-07-13 20:07:14,357 INFO L226 Difference]: Without dead ends: 589 [2021-07-13 20:07:14,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1102.1ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:07:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-07-13 20:07:14,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 439. [2021-07-13 20:07:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.0525114155251143) internal successors, (899), 438 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 899 transitions. [2021-07-13 20:07:14,364 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 899 transitions. Word has length 33 [2021-07-13 20:07:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:14,364 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 899 transitions. [2021-07-13 20:07:14,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 899 transitions. [2021-07-13 20:07:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:14,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:14,366 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:14,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:14,584 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:14,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1541640341, now seen corresponding path program 25 times [2021-07-13 20:07:14,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:14,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952252663] [2021-07-13 20:07:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:14,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:14,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952252663] [2021-07-13 20:07:14,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952252663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:14,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34107847] [2021-07-13 20:07:14,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:14,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:15,083 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:07:15,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:07:15,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:15,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:15,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:15,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:07:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:15,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34107847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:15,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:15,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-07-13 20:07:15,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493842255] [2021-07-13 20:07:15,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:07:15,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:15,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:07:15,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:07:15,260 INFO L87 Difference]: Start difference. First operand 439 states and 899 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:16,571 INFO L93 Difference]: Finished difference Result 678 states and 1346 transitions. [2021-07-13 20:07:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:07:16,572 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:16,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:16,574 INFO L225 Difference]: With dead ends: 678 [2021-07-13 20:07:16,574 INFO L226 Difference]: Without dead ends: 646 [2021-07-13 20:07:16,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1219.5ms TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:07:16,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-07-13 20:07:16,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 440. [2021-07-13 20:07:16,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.052391799544419) internal successors, (901), 439 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 901 transitions. [2021-07-13 20:07:16,582 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 901 transitions. Word has length 33 [2021-07-13 20:07:16,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:16,583 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 901 transitions. [2021-07-13 20:07:16,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 901 transitions. [2021-07-13 20:07:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:16,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:16,584 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:16,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:07:16,789 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:16,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1327084589, now seen corresponding path program 26 times [2021-07-13 20:07:16,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:16,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332987786] [2021-07-13 20:07:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:17,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:17,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332987786] [2021-07-13 20:07:17,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332987786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:17,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140114824] [2021-07-13 20:07:17,108 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 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 [2021-07-13 20:07:17,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:17,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:17,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:17,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:17,322 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:07:17,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:07:17,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:17,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:17,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:17,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:07:17,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:17,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140114824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:17,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:17,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-07-13 20:07:17,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785458521] [2021-07-13 20:07:17,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:07:17,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:17,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:07:17,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:07:17,480 INFO L87 Difference]: Start difference. First operand 440 states and 901 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:19,081 INFO L93 Difference]: Finished difference Result 758 states and 1504 transitions. [2021-07-13 20:07:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:07:19,081 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:19,083 INFO L225 Difference]: With dead ends: 758 [2021-07-13 20:07:19,083 INFO L226 Difference]: Without dead ends: 714 [2021-07-13 20:07:19,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1447.4ms TimeCoverageRelationStatistics Valid=335, Invalid=3571, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:07:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-07-13 20:07:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 447. [2021-07-13 20:07:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.0493273542600896) internal successors, (914), 446 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 914 transitions. [2021-07-13 20:07:19,091 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 914 transitions. Word has length 33 [2021-07-13 20:07:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:19,091 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 914 transitions. [2021-07-13 20:07:19,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 914 transitions. [2021-07-13 20:07:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:19,092 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:19,092 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:19,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:19,292 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:19,293 INFO L82 PathProgramCache]: Analyzing trace with hash -293375473, now seen corresponding path program 27 times [2021-07-13 20:07:19,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:19,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670586683] [2021-07-13 20:07:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:19,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:19,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670586683] [2021-07-13 20:07:19,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670586683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:19,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612312083] [2021-07-13 20:07:19,554 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 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 [2021-07-13 20:07:19,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:07:19,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:19,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:19,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:19,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:19,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:19,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:07:19,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:19,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:19,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:19,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-13 20:07:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:20,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612312083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:20,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:20,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228081626] [2021-07-13 20:07:20,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:20,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:20,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:20,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:20,071 INFO L87 Difference]: Start difference. First operand 447 states and 914 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:20,993 INFO L93 Difference]: Finished difference Result 566 states and 1143 transitions. [2021-07-13 20:07:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:07:20,994 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:20,995 INFO L225 Difference]: With dead ends: 566 [2021-07-13 20:07:20,995 INFO L226 Difference]: Without dead ends: 538 [2021-07-13 20:07:20,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1020.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:07:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-07-13 20:07:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 450. [2021-07-13 20:07:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.046770601336303) internal successors, (919), 449 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 919 transitions. [2021-07-13 20:07:21,003 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 919 transitions. Word has length 33 [2021-07-13 20:07:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:21,003 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 919 transitions. [2021-07-13 20:07:21,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 919 transitions. [2021-07-13 20:07:21,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:21,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:21,004 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:21,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:07:21,221 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:21,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:21,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1738305687, now seen corresponding path program 28 times [2021-07-13 20:07:21,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:21,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456343240] [2021-07-13 20:07:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:21,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:21,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456343240] [2021-07-13 20:07:21,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456343240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:21,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796574096] [2021-07-13 20:07:21,487 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 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 [2021-07-13 20:07:21,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:21,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:21,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:21,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:21,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:21,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:21,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:07:21,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:21,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:21,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:21,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:07:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:21,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796574096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:21,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:21,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:21,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116519065] [2021-07-13 20:07:21,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:21,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:21,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:21,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:21,980 INFO L87 Difference]: Start difference. First operand 450 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:22,828 INFO L93 Difference]: Finished difference Result 581 states and 1153 transitions. [2021-07-13 20:07:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:07:22,829 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:22,830 INFO L225 Difference]: With dead ends: 581 [2021-07-13 20:07:22,830 INFO L226 Difference]: Without dead ends: 533 [2021-07-13 20:07:22,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 920.9ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:07:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-13 20:07:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 459. [2021-07-13 20:07:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.052401746724891) internal successors, (940), 458 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 940 transitions. [2021-07-13 20:07:22,837 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 940 transitions. Word has length 33 [2021-07-13 20:07:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:22,837 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 940 transitions. [2021-07-13 20:07:22,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 940 transitions. [2021-07-13 20:07:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:22,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:22,838 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:23,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:07:23,060 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1277289895, now seen corresponding path program 29 times [2021-07-13 20:07:23,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:23,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100227928] [2021-07-13 20:07:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:23,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:23,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100227928] [2021-07-13 20:07:23,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100227928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:23,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966435496] [2021-07-13 20:07:23,325 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 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 [2021-07-13 20:07:23,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:07:23,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:23,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:23,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:23,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:23,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:23,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:07:23,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:23,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:23,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:23,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:07:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:23,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966435496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:23,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:23,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-13 20:07:23,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558649825] [2021-07-13 20:07:23,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:07:23,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:23,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:07:23,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:07:23,862 INFO L87 Difference]: Start difference. First operand 459 states and 940 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:24,864 INFO L93 Difference]: Finished difference Result 618 states and 1220 transitions. [2021-07-13 20:07:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:07:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:24,866 INFO L225 Difference]: With dead ends: 618 [2021-07-13 20:07:24,866 INFO L226 Difference]: Without dead ends: 570 [2021-07-13 20:07:24,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1038.6ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:07:24,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-13 20:07:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 460. [2021-07-13 20:07:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.052287581699346) internal successors, (942), 459 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 942 transitions. [2021-07-13 20:07:24,877 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 942 transitions. Word has length 33 [2021-07-13 20:07:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:24,877 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 942 transitions. [2021-07-13 20:07:24,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 942 transitions. [2021-07-13 20:07:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:24,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:24,879 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:25,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:07:25,101 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:25,101 INFO L82 PathProgramCache]: Analyzing trace with hash 108332695, now seen corresponding path program 30 times [2021-07-13 20:07:25,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:25,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570296825] [2021-07-13 20:07:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:25,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:25,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:25,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570296825] [2021-07-13 20:07:25,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570296825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:25,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908624468] [2021-07-13 20:07:25,370 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 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 [2021-07-13 20:07:25,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:07:25,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:25,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:25,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:25,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:25,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:25,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:07:25,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:25,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:25,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:25,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:07:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:25,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908624468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:25,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:25,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:25,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066394492] [2021-07-13 20:07:25,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:25,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:25,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:25,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:25,929 INFO L87 Difference]: Start difference. First operand 460 states and 942 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:27,231 INFO L93 Difference]: Finished difference Result 656 states and 1298 transitions. [2021-07-13 20:07:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:07:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:27,233 INFO L225 Difference]: With dead ends: 656 [2021-07-13 20:07:27,233 INFO L226 Difference]: Without dead ends: 608 [2021-07-13 20:07:27,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1139.0ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:07:27,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-07-13 20:07:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 464. [2021-07-13 20:07:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0518358531317493) internal successors, (950), 463 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 950 transitions. [2021-07-13 20:07:27,240 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 950 transitions. Word has length 33 [2021-07-13 20:07:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:27,240 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 950 transitions. [2021-07-13 20:07:27,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 950 transitions. [2021-07-13 20:07:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:27,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:27,242 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:27,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:07:27,457 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:27,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:27,457 INFO L82 PathProgramCache]: Analyzing trace with hash -532777895, now seen corresponding path program 31 times [2021-07-13 20:07:27,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:27,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764742936] [2021-07-13 20:07:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:27,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:27,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764742936] [2021-07-13 20:07:27,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764742936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:27,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892036781] [2021-07-13 20:07:27,721 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 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 [2021-07-13 20:07:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:27,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:27,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:28,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:28,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:28,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:07:28,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:28,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:28,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:07:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:28,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892036781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:28,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:28,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:28,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433121418] [2021-07-13 20:07:28,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:28,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:28,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:28,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:28,193 INFO L87 Difference]: Start difference. First operand 464 states and 950 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:29,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:29,755 INFO L93 Difference]: Finished difference Result 689 states and 1367 transitions. [2021-07-13 20:07:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:07:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:29,758 INFO L225 Difference]: With dead ends: 689 [2021-07-13 20:07:29,758 INFO L226 Difference]: Without dead ends: 657 [2021-07-13 20:07:29,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1314.2ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:07:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-07-13 20:07:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 465. [2021-07-13 20:07:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0517241379310347) internal successors, (952), 464 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 952 transitions. [2021-07-13 20:07:29,778 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 952 transitions. Word has length 33 [2021-07-13 20:07:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:29,778 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 952 transitions. [2021-07-13 20:07:29,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 952 transitions. [2021-07-13 20:07:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:29,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:29,779 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:29,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:29,997 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:29,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:29,997 INFO L82 PathProgramCache]: Analyzing trace with hash 893464471, now seen corresponding path program 32 times [2021-07-13 20:07:29,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:29,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190348831] [2021-07-13 20:07:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:30,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:30,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190348831] [2021-07-13 20:07:30,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190348831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:30,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433811710] [2021-07-13 20:07:30,451 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 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 [2021-07-13 20:07:30,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:30,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:30,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:30,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:30,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:30,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:30,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:07:30,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:30,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:30,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:30,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:07:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:31,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433811710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:31,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:31,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:31,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475684875] [2021-07-13 20:07:31,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:31,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:31,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:31,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:31,038 INFO L87 Difference]: Start difference. First operand 465 states and 952 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:32,975 INFO L93 Difference]: Finished difference Result 757 states and 1498 transitions. [2021-07-13 20:07:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:07:32,976 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:32,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:32,978 INFO L225 Difference]: With dead ends: 757 [2021-07-13 20:07:32,978 INFO L226 Difference]: Without dead ends: 713 [2021-07-13 20:07:32,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1743.2ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:07:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-07-13 20:07:32,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 461. [2021-07-13 20:07:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.0456521739130435) internal successors, (941), 460 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 941 transitions. [2021-07-13 20:07:32,989 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 941 transitions. Word has length 33 [2021-07-13 20:07:32,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:32,989 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 941 transitions. [2021-07-13 20:07:32,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:32,989 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 941 transitions. [2021-07-13 20:07:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:33,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:33,013 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:33,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-13 20:07:33,229 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:33,229 INFO L82 PathProgramCache]: Analyzing trace with hash 255748759, now seen corresponding path program 33 times [2021-07-13 20:07:33,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:33,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058552311] [2021-07-13 20:07:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:33,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:33,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058552311] [2021-07-13 20:07:33,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058552311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:33,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117586190] [2021-07-13 20:07:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:33,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:07:33,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:33,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:33,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:33,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:33,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:33,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:33,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:07:33,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:33,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:33,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:33,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-13 20:07:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:34,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117586190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:34,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:34,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:34,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073221406] [2021-07-13 20:07:34,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:34,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:34,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:34,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:34,199 INFO L87 Difference]: Start difference. First operand 461 states and 941 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:35,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:35,383 INFO L93 Difference]: Finished difference Result 579 states and 1168 transitions. [2021-07-13 20:07:35,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:07:35,384 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:35,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:35,387 INFO L225 Difference]: With dead ends: 579 [2021-07-13 20:07:35,387 INFO L226 Difference]: Without dead ends: 551 [2021-07-13 20:07:35,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1259.0ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:07:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-07-13 20:07:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 453. [2021-07-13 20:07:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.0464601769911503) internal successors, (925), 452 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 925 transitions. [2021-07-13 20:07:35,406 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 925 transitions. Word has length 33 [2021-07-13 20:07:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:35,406 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 925 transitions. [2021-07-13 20:07:35,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 925 transitions. [2021-07-13 20:07:35,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:35,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:35,407 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:35,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:07:35,632 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:35,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1562594731, now seen corresponding path program 34 times [2021-07-13 20:07:35,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:35,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240664439] [2021-07-13 20:07:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:36,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:36,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240664439] [2021-07-13 20:07:36,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240664439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:36,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165055] [2021-07-13 20:07:36,040 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 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 [2021-07-13 20:07:36,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:36,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:36,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:36,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:36,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:36,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:07:36,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:36,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:36,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:36,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:07:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:36,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:36,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:36,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:36,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300684402] [2021-07-13 20:07:36,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:36,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:36,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:36,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:36,580 INFO L87 Difference]: Start difference. First operand 453 states and 925 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:37,469 INFO L93 Difference]: Finished difference Result 557 states and 1118 transitions. [2021-07-13 20:07:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:07:37,469 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:37,470 INFO L225 Difference]: With dead ends: 557 [2021-07-13 20:07:37,471 INFO L226 Difference]: Without dead ends: 509 [2021-07-13 20:07:37,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1154.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:07:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-13 20:07:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 456. [2021-07-13 20:07:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.046153846153846) internal successors, (931), 455 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 931 transitions. [2021-07-13 20:07:37,477 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 931 transitions. Word has length 33 [2021-07-13 20:07:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:37,477 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 931 transitions. [2021-07-13 20:07:37,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 931 transitions. [2021-07-13 20:07:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:37,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:37,478 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:37,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:37,693 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:37,694 INFO L82 PathProgramCache]: Analyzing trace with hash -176972141, now seen corresponding path program 35 times [2021-07-13 20:07:37,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:37,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919657898] [2021-07-13 20:07:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:38,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:38,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919657898] [2021-07-13 20:07:38,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919657898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:38,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788474614] [2021-07-13 20:07:38,190 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 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 [2021-07-13 20:07:38,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:07:38,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:38,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:38,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:38,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:38,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:38,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:07:38,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:38,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:38,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:38,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:07:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788474614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:38,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:38,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:38,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697345171] [2021-07-13 20:07:38,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:38,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:38,773 INFO L87 Difference]: Start difference. First operand 456 states and 931 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:40,022 INFO L93 Difference]: Finished difference Result 562 states and 1131 transitions. [2021-07-13 20:07:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:07:40,022 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:40,024 INFO L225 Difference]: With dead ends: 562 [2021-07-13 20:07:40,024 INFO L226 Difference]: Without dead ends: 518 [2021-07-13 20:07:40,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1383.0ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:07:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-13 20:07:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 462. [2021-07-13 20:07:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0455531453362257) internal successors, (943), 461 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 943 transitions. [2021-07-13 20:07:40,051 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 943 transitions. Word has length 33 [2021-07-13 20:07:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:40,051 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 943 transitions. [2021-07-13 20:07:40,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 943 transitions. [2021-07-13 20:07:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:40,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:40,052 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:40,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:07:40,275 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:40,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:40,276 INFO L82 PathProgramCache]: Analyzing trace with hash -818082731, now seen corresponding path program 36 times [2021-07-13 20:07:40,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:40,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995980070] [2021-07-13 20:07:40,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:40,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:40,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995980070] [2021-07-13 20:07:40,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995980070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:40,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744915378] [2021-07-13 20:07:40,633 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 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 [2021-07-13 20:07:40,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:07:40,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:40,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:40,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:40,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:40,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:40,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:07:40,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:40,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:40,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:40,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:07:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:41,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744915378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:41,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:41,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:41,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496379757] [2021-07-13 20:07:41,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:41,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:41,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:41,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:41,159 INFO L87 Difference]: Start difference. First operand 462 states and 943 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:42,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:42,302 INFO L93 Difference]: Finished difference Result 596 states and 1202 transitions. [2021-07-13 20:07:42,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:07:42,303 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:42,305 INFO L225 Difference]: With dead ends: 596 [2021-07-13 20:07:42,305 INFO L226 Difference]: Without dead ends: 564 [2021-07-13 20:07:42,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1185.3ms TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:07:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-07-13 20:07:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 463. [2021-07-13 20:07:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0454545454545454) internal successors, (945), 462 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 945 transitions. [2021-07-13 20:07:42,310 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 945 transitions. Word has length 33 [2021-07-13 20:07:42,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:42,311 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 945 transitions. [2021-07-13 20:07:42,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 945 transitions. [2021-07-13 20:07:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:42,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:42,312 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:42,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:42,519 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash 608159635, now seen corresponding path program 37 times [2021-07-13 20:07:42,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:42,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488812790] [2021-07-13 20:07:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:42,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:42,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488812790] [2021-07-13 20:07:42,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488812790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:42,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025642803] [2021-07-13 20:07:42,933 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 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 [2021-07-13 20:07:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:42,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:42,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:43,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:43,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:43,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:43,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:07:43,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:43,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:43,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:43,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:07:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:43,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025642803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:43,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:43,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:43,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816153821] [2021-07-13 20:07:43,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:43,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:43,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:43,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:43,477 INFO L87 Difference]: Start difference. First operand 463 states and 945 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:45,553 INFO L93 Difference]: Finished difference Result 658 states and 1327 transitions. [2021-07-13 20:07:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:07:45,554 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:45,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:45,556 INFO L225 Difference]: With dead ends: 658 [2021-07-13 20:07:45,556 INFO L226 Difference]: Without dead ends: 610 [2021-07-13 20:07:45,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1893.2ms TimeCoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:07:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-07-13 20:07:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 464. [2021-07-13 20:07:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0431965442764577) internal successors, (946), 463 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:45,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 946 transitions. [2021-07-13 20:07:45,564 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 946 transitions. Word has length 33 [2021-07-13 20:07:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:45,566 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 946 transitions. [2021-07-13 20:07:45,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 946 transitions. [2021-07-13 20:07:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:45,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:45,579 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:45,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 20:07:45,802 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:45,802 INFO L82 PathProgramCache]: Analyzing trace with hash -306473111, now seen corresponding path program 38 times [2021-07-13 20:07:45,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:45,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16008434] [2021-07-13 20:07:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:46,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:46,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16008434] [2021-07-13 20:07:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16008434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:46,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116502798] [2021-07-13 20:07:46,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:46,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:07:46,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:46,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:46,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:46,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:46,660 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 27 treesize of output 13 [2021-07-13 20:07:46,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:46,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:46,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:46,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-13 20:07:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:46,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116502798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:46,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:46,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:46,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958005448] [2021-07-13 20:07:46,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:46,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:46,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:46,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:46,954 INFO L87 Difference]: Start difference. First operand 464 states and 946 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:48,240 INFO L93 Difference]: Finished difference Result 556 states and 1117 transitions. [2021-07-13 20:07:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:07:48,240 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:48,242 INFO L225 Difference]: With dead ends: 556 [2021-07-13 20:07:48,242 INFO L226 Difference]: Without dead ends: 528 [2021-07-13 20:07:48,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1589.2ms TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:07:48,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-07-13 20:07:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 459. [2021-07-13 20:07:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.0458515283842793) internal successors, (937), 458 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:48,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 937 transitions. [2021-07-13 20:07:48,249 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 937 transitions. Word has length 33 [2021-07-13 20:07:48,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:48,249 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 937 transitions. [2021-07-13 20:07:48,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 937 transitions. [2021-07-13 20:07:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:48,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:48,250 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:48,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:48,473 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:48,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:48,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1502778699, now seen corresponding path program 39 times [2021-07-13 20:07:48,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:48,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542986063] [2021-07-13 20:07:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:48,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:48,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542986063] [2021-07-13 20:07:48,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542986063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991658158] [2021-07-13 20:07:48,861 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 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 [2021-07-13 20:07:48,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:07:48,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:48,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:48,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:49,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:49,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:49,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:07:49,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:49,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:49,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:49,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:07:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:49,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991658158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:49,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:49,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:49,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368681938] [2021-07-13 20:07:49,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:49,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:49,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:49,435 INFO L87 Difference]: Start difference. First operand 459 states and 937 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:50,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:50,646 INFO L93 Difference]: Finished difference Result 607 states and 1202 transitions. [2021-07-13 20:07:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:07:50,646 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:50,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:50,648 INFO L225 Difference]: With dead ends: 607 [2021-07-13 20:07:50,648 INFO L226 Difference]: Without dead ends: 559 [2021-07-13 20:07:50,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1219.5ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:07:50,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-13 20:07:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-07-13 20:07:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.051063829787234) internal successors, (964), 470 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 964 transitions. [2021-07-13 20:07:50,656 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 964 transitions. Word has length 33 [2021-07-13 20:07:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:50,656 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 964 transitions. [2021-07-13 20:07:50,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 964 transitions. [2021-07-13 20:07:50,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:50,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:50,679 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:50,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:07:50,904 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:50,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:50,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1512816883, now seen corresponding path program 40 times [2021-07-13 20:07:50,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:50,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529950092] [2021-07-13 20:07:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:51,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:51,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529950092] [2021-07-13 20:07:51,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529950092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:51,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402156028] [2021-07-13 20:07:51,267 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 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 [2021-07-13 20:07:51,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:51,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:51,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:51,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:51,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:51,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:51,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:07:51,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:51,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:51,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:51,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:07:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:51,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402156028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:51,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:51,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:51,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855186428] [2021-07-13 20:07:51,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:51,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:51,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:51,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:51,789 INFO L87 Difference]: Start difference. First operand 471 states and 964 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:53,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:53,354 INFO L93 Difference]: Finished difference Result 644 states and 1269 transitions. [2021-07-13 20:07:53,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:07:53,354 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:53,356 INFO L225 Difference]: With dead ends: 644 [2021-07-13 20:07:53,356 INFO L226 Difference]: Without dead ends: 596 [2021-07-13 20:07:53,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1159.9ms TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:07:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-07-13 20:07:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 472. [2021-07-13 20:07:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.050955414012739) internal successors, (966), 471 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 966 transitions. [2021-07-13 20:07:53,362 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 966 transitions. Word has length 33 [2021-07-13 20:07:53,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:53,362 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 966 transitions. [2021-07-13 20:07:53,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:53,362 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 966 transitions. [2021-07-13 20:07:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:53,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:53,363 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:53,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:07:53,563 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:53,564 INFO L82 PathProgramCache]: Analyzing trace with hash -127194293, now seen corresponding path program 41 times [2021-07-13 20:07:53,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:53,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043594135] [2021-07-13 20:07:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:54,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:54,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043594135] [2021-07-13 20:07:54,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043594135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:54,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604782947] [2021-07-13 20:07:54,072 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 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 [2021-07-13 20:07:54,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:07:54,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:54,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:54,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:54,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:54,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:54,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:54,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:07:54,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:54,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:54,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:54,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:07:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:54,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604782947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:54,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:54,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:54,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144423713] [2021-07-13 20:07:54,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:54,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:54,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:54,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:54,620 INFO L87 Difference]: Start difference. First operand 472 states and 966 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:56,074 INFO L93 Difference]: Finished difference Result 682 states and 1347 transitions. [2021-07-13 20:07:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:07:56,074 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:56,076 INFO L225 Difference]: With dead ends: 682 [2021-07-13 20:07:56,076 INFO L226 Difference]: Without dead ends: 634 [2021-07-13 20:07:56,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1354.2ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:07:56,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-07-13 20:07:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2021-07-13 20:07:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.0505263157894738) internal successors, (974), 475 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 974 transitions. [2021-07-13 20:07:56,084 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 974 transitions. Word has length 33 [2021-07-13 20:07:56,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:56,084 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 974 transitions. [2021-07-13 20:07:56,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:56,085 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 974 transitions. [2021-07-13 20:07:56,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:56,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:56,085 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:56,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:56,286 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:56,295 INFO L82 PathProgramCache]: Analyzing trace with hash -768304883, now seen corresponding path program 42 times [2021-07-13 20:07:56,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:56,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343130105] [2021-07-13 20:07:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:56,573 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-13 20:07:56,733 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-13 20:07:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:57,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:57,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343130105] [2021-07-13 20:07:57,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343130105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:57,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339432249] [2021-07-13 20:07:57,007 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 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 [2021-07-13 20:07:57,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:07:57,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:57,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:07:57,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:57,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:07:57,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:07:57,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:07:57,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:07:57,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:07:57,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:07:57,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:07:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:57,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339432249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:57,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:57,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:07:57,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656813323] [2021-07-13 20:07:57,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:07:57,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:57,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:07:57,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:07:57,625 INFO L87 Difference]: Start difference. First operand 476 states and 974 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:58,110 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-07-13 20:07:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:59,142 INFO L93 Difference]: Finished difference Result 715 states and 1416 transitions. [2021-07-13 20:07:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:07:59,143 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:07:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:59,145 INFO L225 Difference]: With dead ends: 715 [2021-07-13 20:07:59,145 INFO L226 Difference]: Without dead ends: 683 [2021-07-13 20:07:59,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1767.7ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:07:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-07-13 20:07:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 477. [2021-07-13 20:07:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.0504201680672267) internal successors, (976), 476 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 976 transitions. [2021-07-13 20:07:59,153 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 976 transitions. Word has length 33 [2021-07-13 20:07:59,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:59,153 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 976 transitions. [2021-07-13 20:07:59,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:59,153 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 976 transitions. [2021-07-13 20:07:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:07:59,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:59,154 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:59,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-13 20:07:59,355 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:59,355 INFO L82 PathProgramCache]: Analyzing trace with hash 657937483, now seen corresponding path program 43 times [2021-07-13 20:07:59,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:59,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623541698] [2021-07-13 20:07:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:59,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:59,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623541698] [2021-07-13 20:07:59,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623541698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:59,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970519499] [2021-07-13 20:07:59,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:07:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:59,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:07:59,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:00,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:00,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:00,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:00,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:00,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:00,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:00,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:00,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970519499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:00,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:00,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:00,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518981590] [2021-07-13 20:08:00,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:00,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:00,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:00,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:00,363 INFO L87 Difference]: Start difference. First operand 477 states and 976 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:02,379 INFO L93 Difference]: Finished difference Result 783 states and 1547 transitions. [2021-07-13 20:08:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:08:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:02,381 INFO L225 Difference]: With dead ends: 783 [2021-07-13 20:08:02,382 INFO L226 Difference]: Without dead ends: 739 [2021-07-13 20:08:02,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1671.2ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:08:02,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-07-13 20:08:02,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 473. [2021-07-13 20:08:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.044491525423729) internal successors, (965), 472 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 965 transitions. [2021-07-13 20:08:02,395 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 965 transitions. Word has length 33 [2021-07-13 20:08:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:02,395 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 965 transitions. [2021-07-13 20:08:02,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 965 transitions. [2021-07-13 20:08:02,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:02,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:02,396 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:02,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:02,617 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:02,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:02,617 INFO L82 PathProgramCache]: Analyzing trace with hash 20221771, now seen corresponding path program 44 times [2021-07-13 20:08:02,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:02,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290103084] [2021-07-13 20:08:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:02,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:02,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290103084] [2021-07-13 20:08:02,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290103084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:02,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122456211] [2021-07-13 20:08:02,948 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 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 [2021-07-13 20:08:02,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:02,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:02,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:03,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:03,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:03,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:03,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:03,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:03,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:03,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:03,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-13 20:08:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:03,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122456211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:03,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:03,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:03,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362440548] [2021-07-13 20:08:03,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:03,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:03,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:03,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:03,501 INFO L87 Difference]: Start difference. First operand 473 states and 965 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:04,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:04,615 INFO L93 Difference]: Finished difference Result 605 states and 1217 transitions. [2021-07-13 20:08:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:08:04,616 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:04,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:04,626 INFO L225 Difference]: With dead ends: 605 [2021-07-13 20:08:04,626 INFO L226 Difference]: Without dead ends: 577 [2021-07-13 20:08:04,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1217.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:08:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-13 20:08:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-07-13 20:08:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0452586206896552) internal successors, (949), 464 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 949 transitions. [2021-07-13 20:08:04,634 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 949 transitions. Word has length 33 [2021-07-13 20:08:04,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:04,634 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 949 transitions. [2021-07-13 20:08:04,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 949 transitions. [2021-07-13 20:08:04,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:04,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:04,635 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:04,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:04,853 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:04,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:04,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1798121719, now seen corresponding path program 45 times [2021-07-13 20:08:04,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:04,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945250795] [2021-07-13 20:08:04,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:05,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:05,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945250795] [2021-07-13 20:08:05,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945250795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:05,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203220874] [2021-07-13 20:08:05,346 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 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 [2021-07-13 20:08:05,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:08:05,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:05,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:05,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:05,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:05,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:05,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:05,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:05,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:05,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:05,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:05,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203220874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:05,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:05,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:05,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392136432] [2021-07-13 20:08:05,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:05,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:05,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:05,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:05,900 INFO L87 Difference]: Start difference. First operand 465 states and 949 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:07,015 INFO L93 Difference]: Finished difference Result 583 states and 1167 transitions. [2021-07-13 20:08:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:08:07,015 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:07,017 INFO L225 Difference]: With dead ends: 583 [2021-07-13 20:08:07,017 INFO L226 Difference]: Without dead ends: 535 [2021-07-13 20:08:07,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1306.3ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:08:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-07-13 20:08:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 468. [2021-07-13 20:08:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.044967880085653) internal successors, (955), 467 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 955 transitions. [2021-07-13 20:08:07,023 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 955 transitions. Word has length 33 [2021-07-13 20:08:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:07,023 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 955 transitions. [2021-07-13 20:08:07,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 955 transitions. [2021-07-13 20:08:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:07,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:07,024 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:07,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:08:07,225 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:07,226 INFO L82 PathProgramCache]: Analyzing trace with hash -412499129, now seen corresponding path program 46 times [2021-07-13 20:08:07,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:07,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602995173] [2021-07-13 20:08:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:07,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:07,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602995173] [2021-07-13 20:08:07,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602995173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:07,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138848381] [2021-07-13 20:08:07,558 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 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 [2021-07-13 20:08:07,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:07,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:07,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:07,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:07,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:07,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:07,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:07,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:07,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:07,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:08,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138848381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:08,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:08,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:08,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847434446] [2021-07-13 20:08:08,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:08,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:08,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:08,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:08,096 INFO L87 Difference]: Start difference. First operand 468 states and 955 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:09,959 INFO L93 Difference]: Finished difference Result 708 states and 1405 transitions. [2021-07-13 20:08:09,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:08:09,960 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:09,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:09,961 INFO L225 Difference]: With dead ends: 708 [2021-07-13 20:08:09,961 INFO L226 Difference]: Without dead ends: 613 [2021-07-13 20:08:09,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1699.1ms TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:08:09,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-13 20:08:09,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 483. [2021-07-13 20:08:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.045643153526971) internal successors, (986), 482 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 986 transitions. [2021-07-13 20:08:09,998 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 986 transitions. Word has length 33 [2021-07-13 20:08:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:09,998 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 986 transitions. [2021-07-13 20:08:09,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 986 transitions. [2021-07-13 20:08:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:09,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:09,999 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:10,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:10,213 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:10,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1053609719, now seen corresponding path program 47 times [2021-07-13 20:08:10,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:10,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599239720] [2021-07-13 20:08:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:10,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:10,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599239720] [2021-07-13 20:08:10,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599239720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:10,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495966343] [2021-07-13 20:08:10,660 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 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 [2021-07-13 20:08:10,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:08:10,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:10,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:10,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:11,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:11,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:11,949 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 25 treesize of output 13 [2021-07-13 20:08:11,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:11,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:11,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:11,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:08:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:12,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495966343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:12,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:12,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-13 20:08:12,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97927768] [2021-07-13 20:08:12,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:08:12,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:12,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:08:12,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:08:12,163 INFO L87 Difference]: Start difference. First operand 483 states and 986 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:12,777 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-07-13 20:08:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:14,450 INFO L93 Difference]: Finished difference Result 736 states and 1461 transitions. [2021-07-13 20:08:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:08:14,451 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:14,452 INFO L225 Difference]: With dead ends: 736 [2021-07-13 20:08:14,452 INFO L226 Difference]: Without dead ends: 668 [2021-07-13 20:08:14,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 2753.4ms TimeCoverageRelationStatistics Valid=441, Invalid=3719, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:08:14,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-13 20:08:14,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 484. [2021-07-13 20:08:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.0455486542443064) internal successors, (988), 483 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 988 transitions. [2021-07-13 20:08:14,458 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 988 transitions. Word has length 33 [2021-07-13 20:08:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:14,458 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 988 transitions. [2021-07-13 20:08:14,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 988 transitions. [2021-07-13 20:08:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:14,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:14,459 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:14,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:08:14,659 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:14,660 INFO L82 PathProgramCache]: Analyzing trace with hash 372632647, now seen corresponding path program 48 times [2021-07-13 20:08:14,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:14,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040535123] [2021-07-13 20:08:14,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:15,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:15,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040535123] [2021-07-13 20:08:15,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040535123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:15,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259689120] [2021-07-13 20:08:15,121 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 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 [2021-07-13 20:08:15,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:08:15,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:15,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:08:15,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:15,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:15,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:08:15,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:15,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:15,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:15,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:08:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:15,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259689120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:15,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:15,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:15,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697313832] [2021-07-13 20:08:15,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:15,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:15,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:15,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:15,657 INFO L87 Difference]: Start difference. First operand 484 states and 988 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:18,324 INFO L93 Difference]: Finished difference Result 829 states and 1649 transitions. [2021-07-13 20:08:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:08:18,324 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:18,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:18,326 INFO L225 Difference]: With dead ends: 829 [2021-07-13 20:08:18,326 INFO L226 Difference]: Without dead ends: 753 [2021-07-13 20:08:18,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2291.2ms TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:08:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-07-13 20:08:18,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 497. [2021-07-13 20:08:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0483870967741935) internal successors, (1016), 496 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1016 transitions. [2021-07-13 20:08:18,336 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1016 transitions. Word has length 33 [2021-07-13 20:08:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:18,336 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1016 transitions. [2021-07-13 20:08:18,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1016 transitions. [2021-07-13 20:08:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:18,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:18,338 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:18,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:08:18,543 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash -542000099, now seen corresponding path program 49 times [2021-07-13 20:08:18,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:18,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057170383] [2021-07-13 20:08:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:19,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:19,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057170383] [2021-07-13 20:08:19,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057170383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:19,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064697896] [2021-07-13 20:08:19,059 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 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 [2021-07-13 20:08:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:19,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:19,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:19,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:19,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:19,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:19,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:19,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:19,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:19,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-13 20:08:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:19,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064697896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:19,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:19,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:19,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417698802] [2021-07-13 20:08:19,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:19,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:19,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:19,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:19,611 INFO L87 Difference]: Start difference. First operand 497 states and 1016 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:21,181 INFO L93 Difference]: Finished difference Result 652 states and 1298 transitions. [2021-07-13 20:08:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:08:21,181 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:21,183 INFO L225 Difference]: With dead ends: 652 [2021-07-13 20:08:21,183 INFO L226 Difference]: Without dead ends: 596 [2021-07-13 20:08:21,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1846.2ms TimeCoverageRelationStatistics Valid=362, Invalid=3420, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:08:21,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-07-13 20:08:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 511. [2021-07-13 20:08:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.045098039215686) internal successors, (1043), 510 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1043 transitions. [2021-07-13 20:08:21,189 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1043 transitions. Word has length 33 [2021-07-13 20:08:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:21,190 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1043 transitions. [2021-07-13 20:08:21,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1043 transitions. [2021-07-13 20:08:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:21,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:21,191 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:21,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 20:08:21,392 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:21,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:21,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2125436613, now seen corresponding path program 50 times [2021-07-13 20:08:21,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:21,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304440472] [2021-07-13 20:08:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:21,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:21,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304440472] [2021-07-13 20:08:21,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304440472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:21,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579002860] [2021-07-13 20:08:21,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:08:21,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:21,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:21,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:21,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:22,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:22,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:22,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:22,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:22,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:22,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:22,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:22,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579002860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:22,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:22,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:22,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406581796] [2021-07-13 20:08:22,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:22,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:22,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:22,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:22,420 INFO L87 Difference]: Start difference. First operand 511 states and 1043 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:23,480 INFO L93 Difference]: Finished difference Result 637 states and 1276 transitions. [2021-07-13 20:08:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:08:23,481 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:23,482 INFO L225 Difference]: With dead ends: 637 [2021-07-13 20:08:23,482 INFO L226 Difference]: Without dead ends: 589 [2021-07-13 20:08:23,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1223.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:08:23,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-07-13 20:08:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 515. [2021-07-13 20:08:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.044747081712062) internal successors, (1051), 514 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1051 transitions. [2021-07-13 20:08:23,491 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1051 transitions. Word has length 33 [2021-07-13 20:08:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:23,491 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1051 transitions. [2021-07-13 20:08:23,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1051 transitions. [2021-07-13 20:08:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:23,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:23,492 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:23,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:08:23,694 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:23,694 INFO L82 PathProgramCache]: Analyzing trace with hash -739814023, now seen corresponding path program 51 times [2021-07-13 20:08:23,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:23,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101982458] [2021-07-13 20:08:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:24,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:24,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101982458] [2021-07-13 20:08:24,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101982458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:24,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379972861] [2021-07-13 20:08:24,195 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 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 [2021-07-13 20:08:24,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:08:24,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:24,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:24,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:24,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:24,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:24,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:24,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:24,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:24,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:24,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:24,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379972861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:24,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:24,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:24,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325297977] [2021-07-13 20:08:24,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:24,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:24,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:24,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:24,713 INFO L87 Difference]: Start difference. First operand 515 states and 1051 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:26,669 INFO L93 Difference]: Finished difference Result 764 states and 1519 transitions. [2021-07-13 20:08:26,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:08:26,670 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:26,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:26,671 INFO L225 Difference]: With dead ends: 764 [2021-07-13 20:08:26,671 INFO L226 Difference]: Without dead ends: 669 [2021-07-13 20:08:26,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1890.6ms TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:08:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-07-13 20:08:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 531. [2021-07-13 20:08:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.047169811320755) internal successors, (1085), 530 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1085 transitions. [2021-07-13 20:08:26,698 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1085 transitions. Word has length 33 [2021-07-13 20:08:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:26,698 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1085 transitions. [2021-07-13 20:08:26,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1085 transitions. [2021-07-13 20:08:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:26,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:26,699 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:26,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:26,916 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1380924613, now seen corresponding path program 52 times [2021-07-13 20:08:26,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:26,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790616571] [2021-07-13 20:08:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:27,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:27,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790616571] [2021-07-13 20:08:27,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790616571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:27,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609170794] [2021-07-13 20:08:27,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:27,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:27,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:27,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:27,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:27,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:27,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:27,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:27,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:27,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:27,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:27,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:28,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609170794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:28,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:28,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:28,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006200902] [2021-07-13 20:08:28,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:28,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:28,117 INFO L87 Difference]: Start difference. First operand 531 states and 1085 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:30,509 INFO L93 Difference]: Finished difference Result 788 states and 1566 transitions. [2021-07-13 20:08:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:08:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:30,511 INFO L225 Difference]: With dead ends: 788 [2021-07-13 20:08:30,511 INFO L226 Difference]: Without dead ends: 720 [2021-07-13 20:08:30,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 2253.7ms TimeCoverageRelationStatistics Valid=471, Invalid=3951, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:08:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-07-13 20:08:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 532. [2021-07-13 20:08:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0451977401129944) internal successors, (1086), 531 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1086 transitions. [2021-07-13 20:08:30,520 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1086 transitions. Word has length 33 [2021-07-13 20:08:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:30,521 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1086 transitions. [2021-07-13 20:08:30,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1086 transitions. [2021-07-13 20:08:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:30,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:30,522 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:30,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:30,748 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:30,748 INFO L82 PathProgramCache]: Analyzing trace with hash 45317753, now seen corresponding path program 53 times [2021-07-13 20:08:30,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:30,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184585543] [2021-07-13 20:08:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:31,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:31,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184585543] [2021-07-13 20:08:31,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184585543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:31,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107627120] [2021-07-13 20:08:31,245 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 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 [2021-07-13 20:08:31,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:08:31,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:31,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:08:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:31,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:31,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:31,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:08:31,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:31,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:31,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:31,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:08:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:31,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107627120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:31,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:31,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:31,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051300581] [2021-07-13 20:08:31,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:31,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:31,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:31,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:31,758 INFO L87 Difference]: Start difference. First operand 532 states and 1086 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:34,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:34,770 INFO L93 Difference]: Finished difference Result 888 states and 1768 transitions. [2021-07-13 20:08:34,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:08:34,770 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:34,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:34,771 INFO L225 Difference]: With dead ends: 888 [2021-07-13 20:08:34,772 INFO L226 Difference]: Without dead ends: 812 [2021-07-13 20:08:34,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2618.1ms TimeCoverageRelationStatistics Valid=616, Invalid=5704, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:08:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-07-13 20:08:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 540. [2021-07-13 20:08:34,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.038961038961039) internal successors, (1099), 539 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1099 transitions. [2021-07-13 20:08:34,786 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1099 transitions. Word has length 33 [2021-07-13 20:08:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:34,786 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1099 transitions. [2021-07-13 20:08:34,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1099 transitions. [2021-07-13 20:08:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:34,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:34,787 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:35,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:35,012 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:35,012 INFO L82 PathProgramCache]: Analyzing trace with hash -869314993, now seen corresponding path program 54 times [2021-07-13 20:08:35,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:35,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281626692] [2021-07-13 20:08:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:35,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:35,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281626692] [2021-07-13 20:08:35,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281626692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:35,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930583570] [2021-07-13 20:08:35,362 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 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 [2021-07-13 20:08:35,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:08:35,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:35,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:08:35,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:35,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:35,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:35,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:35,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:08:35,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:35,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:35,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:35,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:16 [2021-07-13 20:08:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:35,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930583570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:35,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:35,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:35,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083109573] [2021-07-13 20:08:35,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:35,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:35,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:35,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:35,881 INFO L87 Difference]: Start difference. First operand 540 states and 1099 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,373 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-07-13 20:08:37,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:37,769 INFO L93 Difference]: Finished difference Result 715 states and 1420 transitions. [2021-07-13 20:08:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:08:37,769 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:37,771 INFO L225 Difference]: With dead ends: 715 [2021-07-13 20:08:37,771 INFO L226 Difference]: Without dead ends: 659 [2021-07-13 20:08:37,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1794.8ms TimeCoverageRelationStatistics Valid=354, Invalid=3306, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:08:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-07-13 20:08:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 544. [2021-07-13 20:08:37,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 2.0386740331491713) internal successors, (1107), 543 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1107 transitions. [2021-07-13 20:08:37,788 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1107 transitions. Word has length 33 [2021-07-13 20:08:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:37,788 INFO L482 AbstractCegarLoop]: Abstraction has 544 states and 1107 transitions. [2021-07-13 20:08:37,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1107 transitions. [2021-07-13 20:08:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:37,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:37,789 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:38,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:08:38,011 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:38,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:38,015 INFO L82 PathProgramCache]: Analyzing trace with hash -865898715, now seen corresponding path program 55 times [2021-07-13 20:08:38,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:38,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712069091] [2021-07-13 20:08:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:38,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:38,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712069091] [2021-07-13 20:08:38,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712069091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:38,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22920950] [2021-07-13 20:08:38,458 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 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 [2021-07-13 20:08:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:38,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:38,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:38,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:38,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:38,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:38,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:38,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:38,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:39,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22920950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:39,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:39,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:39,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245106126] [2021-07-13 20:08:39,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:39,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:39,003 INFO L87 Difference]: Start difference. First operand 544 states and 1107 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:40,918 INFO L93 Difference]: Finished difference Result 766 states and 1515 transitions. [2021-07-13 20:08:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:08:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:40,920 INFO L225 Difference]: With dead ends: 766 [2021-07-13 20:08:40,920 INFO L226 Difference]: Without dead ends: 678 [2021-07-13 20:08:40,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1913.0ms TimeCoverageRelationStatistics Valid=399, Invalid=4023, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:08:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-07-13 20:08:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 570. [2021-07-13 20:08:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.0369068541300526) internal successors, (1159), 569 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1159 transitions. [2021-07-13 20:08:40,926 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1159 transitions. Word has length 33 [2021-07-13 20:08:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:40,926 INFO L482 AbstractCegarLoop]: Abstraction has 570 states and 1159 transitions. [2021-07-13 20:08:40,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1159 transitions. [2021-07-13 20:08:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:40,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:40,927 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:41,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:41,127 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:41,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1507009305, now seen corresponding path program 56 times [2021-07-13 20:08:41,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:41,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934713193] [2021-07-13 20:08:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:41,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:41,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934713193] [2021-07-13 20:08:41,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934713193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:41,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217285682] [2021-07-13 20:08:41,450 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 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 [2021-07-13 20:08:41,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:41,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:41,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:41,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:41,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:41,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:41,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:41,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:41,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:41,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:41,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:41,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217285682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:41,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:41,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:41,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326642787] [2021-07-13 20:08:41,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:41,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:41,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:41,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:41,837 INFO L87 Difference]: Start difference. First operand 570 states and 1159 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:43,703 INFO L93 Difference]: Finished difference Result 771 states and 1529 transitions. [2021-07-13 20:08:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:08:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:43,704 INFO L225 Difference]: With dead ends: 771 [2021-07-13 20:08:43,704 INFO L226 Difference]: Without dead ends: 707 [2021-07-13 20:08:43,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1629.1ms TimeCoverageRelationStatistics Valid=431, Invalid=3991, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:08:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-07-13 20:08:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 571. [2021-07-13 20:08:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.0350877192982457) internal successors, (1160), 570 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1160 transitions. [2021-07-13 20:08:43,710 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1160 transitions. Word has length 33 [2021-07-13 20:08:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:43,710 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1160 transitions. [2021-07-13 20:08:43,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1160 transitions. [2021-07-13 20:08:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:43,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:43,711 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:43,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:08:43,912 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:43,912 INFO L82 PathProgramCache]: Analyzing trace with hash -80766939, now seen corresponding path program 57 times [2021-07-13 20:08:43,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:43,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539852033] [2021-07-13 20:08:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:44,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:44,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539852033] [2021-07-13 20:08:44,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539852033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:44,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6524131] [2021-07-13 20:08:44,189 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 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 [2021-07-13 20:08:44,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:08:44,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:44,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:44,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:44,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:44,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:44,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:44,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:44,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:44,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:44,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6524131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:44,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:44,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:44,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309433681] [2021-07-13 20:08:44,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:44,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:44,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:44,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:44,597 INFO L87 Difference]: Start difference. First operand 571 states and 1160 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:46,961 INFO L93 Difference]: Finished difference Result 823 states and 1634 transitions. [2021-07-13 20:08:46,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:08:46,961 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:46,962 INFO L225 Difference]: With dead ends: 823 [2021-07-13 20:08:46,962 INFO L226 Difference]: Without dead ends: 767 [2021-07-13 20:08:46,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1862.9ms TimeCoverageRelationStatistics Valid=521, Invalid=4881, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:08:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-07-13 20:08:46,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 567. [2021-07-13 20:08:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.030035335689046) internal successors, (1149), 566 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1149 transitions. [2021-07-13 20:08:46,968 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1149 transitions. Word has length 33 [2021-07-13 20:08:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:46,968 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1149 transitions. [2021-07-13 20:08:46,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1149 transitions. [2021-07-13 20:08:46,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:46,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:46,969 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:47,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:47,170 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash -185613557, now seen corresponding path program 58 times [2021-07-13 20:08:47,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:47,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782421915] [2021-07-13 20:08:47,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:47,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:47,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782421915] [2021-07-13 20:08:47,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782421915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:47,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58687868] [2021-07-13 20:08:47,456 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 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 [2021-07-13 20:08:47,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:08:47,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:47,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:47,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:47,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:47,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:47,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:47,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:47,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:47,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-13 20:08:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:47,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58687868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:47,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:47,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-07-13 20:08:47,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834870199] [2021-07-13 20:08:47,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:08:47,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:47,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:08:47,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:08:47,831 INFO L87 Difference]: Start difference. First operand 567 states and 1149 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:49,251 INFO L93 Difference]: Finished difference Result 729 states and 1442 transitions. [2021-07-13 20:08:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:08:49,252 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:49,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:49,253 INFO L225 Difference]: With dead ends: 729 [2021-07-13 20:08:49,253 INFO L226 Difference]: Without dead ends: 673 [2021-07-13 20:08:49,253 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1409.8ms TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:08:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-07-13 20:08:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 573. [2021-07-13 20:08:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0262237762237763) internal successors, (1159), 572 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1159 transitions. [2021-07-13 20:08:49,259 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1159 transitions. Word has length 33 [2021-07-13 20:08:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:49,259 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1159 transitions. [2021-07-13 20:08:49,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1159 transitions. [2021-07-13 20:08:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:49,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:49,260 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:49,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:08:49,461 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash -931000177, now seen corresponding path program 59 times [2021-07-13 20:08:49,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:49,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880975756] [2021-07-13 20:08:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:49,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:49,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880975756] [2021-07-13 20:08:49,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880975756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:49,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436485546] [2021-07-13 20:08:49,721 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:49,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:08:49,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:49,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:08:49,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:50,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:50,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:50,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:50,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:08:50,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:50,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:50,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:50,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:08:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:50,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436485546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:50,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:50,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 34 [2021-07-13 20:08:50,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394527409] [2021-07-13 20:08:50,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:08:50,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:50,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:08:50,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:08:50,295 INFO L87 Difference]: Start difference. First operand 573 states and 1159 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:51,103 INFO L93 Difference]: Finished difference Result 722 states and 1426 transitions. [2021-07-13 20:08:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:08:51,104 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:51,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:51,104 INFO L225 Difference]: With dead ends: 722 [2021-07-13 20:08:51,105 INFO L226 Difference]: Without dead ends: 674 [2021-07-13 20:08:51,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1062.2ms TimeCoverageRelationStatistics Valid=231, Invalid=2421, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:08:51,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-07-13 20:08:51,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 588. [2021-07-13 20:08:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.0306643952299828) internal successors, (1192), 587 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:51,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1192 transitions. [2021-07-13 20:08:51,110 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1192 transitions. Word has length 33 [2021-07-13 20:08:51,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:51,110 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1192 transitions. [2021-07-13 20:08:51,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:51,111 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1192 transitions. [2021-07-13 20:08:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:51,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:51,111 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:51,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:51,312 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:51,312 INFO L82 PathProgramCache]: Analyzing trace with hash 348371537, now seen corresponding path program 60 times [2021-07-13 20:08:51,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:51,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906692969] [2021-07-13 20:08:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:51,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:51,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906692969] [2021-07-13 20:08:51,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906692969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:51,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766767958] [2021-07-13 20:08:51,563 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:51,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:08:51,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:51,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:51,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:51,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:51,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:51,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:51,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:51,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:51,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:51,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:52,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766767958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:52,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:52,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:08:52,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083836717] [2021-07-13 20:08:52,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:08:52,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:52,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:08:52,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:08:52,040 INFO L87 Difference]: Start difference. First operand 588 states and 1192 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:53,123 INFO L93 Difference]: Finished difference Result 759 states and 1493 transitions. [2021-07-13 20:08:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:08:53,124 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:53,125 INFO L225 Difference]: With dead ends: 759 [2021-07-13 20:08:53,125 INFO L226 Difference]: Without dead ends: 711 [2021-07-13 20:08:53,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 970.5ms TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:08:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-07-13 20:08:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 589. [2021-07-13 20:08:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0306122448979593) internal successors, (1194), 588 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1194 transitions. [2021-07-13 20:08:53,131 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1194 transitions. Word has length 33 [2021-07-13 20:08:53,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:53,131 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1194 transitions. [2021-07-13 20:08:53,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:53,131 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1194 transitions. [2021-07-13 20:08:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:53,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:53,132 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:53,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:08:53,333 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:53,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1733994127, now seen corresponding path program 61 times [2021-07-13 20:08:53,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:53,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592147038] [2021-07-13 20:08:53,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:53,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592147038] [2021-07-13 20:08:53,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592147038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478652864] [2021-07-13 20:08:53,638 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 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 [2021-07-13 20:08:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:53,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:53,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:53,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:53,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:53,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:53,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:53,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:53,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:54,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478652864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:54,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:54,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:08:54,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947621116] [2021-07-13 20:08:54,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:08:54,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:54,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:08:54,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:08:54,110 INFO L87 Difference]: Start difference. First operand 589 states and 1194 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:55,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:55,395 INFO L93 Difference]: Finished difference Result 797 states and 1571 transitions. [2021-07-13 20:08:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:08:55,396 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:55,397 INFO L225 Difference]: With dead ends: 797 [2021-07-13 20:08:55,397 INFO L226 Difference]: Without dead ends: 749 [2021-07-13 20:08:55,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1095.5ms TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:08:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-07-13 20:08:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 593. [2021-07-13 20:08:55,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.0304054054054053) internal successors, (1202), 592 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1202 transitions. [2021-07-13 20:08:55,405 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1202 transitions. Word has length 33 [2021-07-13 20:08:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:55,406 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1202 transitions. [2021-07-13 20:08:55,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1202 transitions. [2021-07-13 20:08:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:55,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:55,407 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:55,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-13 20:08:55,630 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:55,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1092883537, now seen corresponding path program 62 times [2021-07-13 20:08:55,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:55,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862434568] [2021-07-13 20:08:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:55,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:55,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862434568] [2021-07-13 20:08:55,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862434568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:55,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529599360] [2021-07-13 20:08:55,915 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 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 [2021-07-13 20:08:55,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:55,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:55,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:55,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:56,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:56,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:56,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:56,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:56,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:56,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:56,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529599360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:56,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:56,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:08:56,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372526951] [2021-07-13 20:08:56,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:08:56,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:56,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:08:56,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:08:56,347 INFO L87 Difference]: Start difference. First operand 593 states and 1202 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:57,494 INFO L93 Difference]: Finished difference Result 830 states and 1640 transitions. [2021-07-13 20:08:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:08:57,494 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:57,496 INFO L225 Difference]: With dead ends: 830 [2021-07-13 20:08:57,496 INFO L226 Difference]: Without dead ends: 798 [2021-07-13 20:08:57,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1131.9ms TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:08:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-07-13 20:08:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 594. [2021-07-13 20:08:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.03035413153457) internal successors, (1204), 593 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1204 transitions. [2021-07-13 20:08:57,505 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1204 transitions. Word has length 33 [2021-07-13 20:08:57,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:57,505 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1204 transitions. [2021-07-13 20:08:57,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1204 transitions. [2021-07-13 20:08:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:57,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:57,506 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:57,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:57,728 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1775841393, now seen corresponding path program 63 times [2021-07-13 20:08:57,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:57,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905459254] [2021-07-13 20:08:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:57,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:57,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905459254] [2021-07-13 20:08:57,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905459254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:57,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60330181] [2021-07-13 20:08:57,981 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 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 [2021-07-13 20:08:58,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:08:58,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:58,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:08:58,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:58,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:08:58,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:08:58,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:08:58,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:08:58,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:08:58,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:08:58,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:08:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:58,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60330181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:58,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:58,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:08:58,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937183098] [2021-07-13 20:08:58,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:08:58,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:58,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:08:58,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:08:58,427 INFO L87 Difference]: Start difference. First operand 594 states and 1204 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:59,839 INFO L93 Difference]: Finished difference Result 897 states and 1769 transitions. [2021-07-13 20:08:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:08:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:08:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:59,841 INFO L225 Difference]: With dead ends: 897 [2021-07-13 20:08:59,841 INFO L226 Difference]: Without dead ends: 853 [2021-07-13 20:08:59,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1310.4ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:08:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-07-13 20:08:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 590. [2021-07-13 20:08:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.025466893039049) internal successors, (1193), 589 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1193 transitions. [2021-07-13 20:08:59,847 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1193 transitions. Word has length 33 [2021-07-13 20:08:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:59,847 INFO L482 AbstractCegarLoop]: Abstraction has 590 states and 1193 transitions. [2021-07-13 20:08:59,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1193 transitions. [2021-07-13 20:08:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:08:59,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:59,848 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:00,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:00,049 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1881410191, now seen corresponding path program 64 times [2021-07-13 20:09:00,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:00,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595347089] [2021-07-13 20:09:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:00,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:00,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595347089] [2021-07-13 20:09:00,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595347089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:00,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312025860] [2021-07-13 20:09:00,314 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 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 [2021-07-13 20:09:00,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:00,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:00,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:00,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:00,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:00,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:00,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:00,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:00,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:00,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:00,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-13 20:09:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:00,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312025860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:00,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:00,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:00,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713960659] [2021-07-13 20:09:00,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:00,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:00,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:00,752 INFO L87 Difference]: Start difference. First operand 590 states and 1193 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:01,654 INFO L93 Difference]: Finished difference Result 720 states and 1441 transitions. [2021-07-13 20:09:01,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:09:01,654 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:01,656 INFO L225 Difference]: With dead ends: 720 [2021-07-13 20:09:01,656 INFO L226 Difference]: Without dead ends: 692 [2021-07-13 20:09:01,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 976.3ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:09:01,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-07-13 20:09:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 582. [2021-07-13 20:09:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.025817555938038) internal successors, (1177), 581 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:01,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1177 transitions. [2021-07-13 20:09:01,661 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1177 transitions. Word has length 33 [2021-07-13 20:09:01,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:01,662 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 1177 transitions. [2021-07-13 20:09:01,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1177 transitions. [2021-07-13 20:09:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:01,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:01,662 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:01,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 20:09:01,863 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:01,863 INFO L82 PathProgramCache]: Analyzing trace with hash 63066701, now seen corresponding path program 65 times [2021-07-13 20:09:01,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:01,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678946767] [2021-07-13 20:09:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:02,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678946767] [2021-07-13 20:09:02,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678946767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:02,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946476632] [2021-07-13 20:09:02,135 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 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 [2021-07-13 20:09:02,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:09:02,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:02,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:02,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:02,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:02,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:02,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:09:02,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:02,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:02,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:02,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:09:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:02,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946476632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:02,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:02,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-07-13 20:09:02,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875222240] [2021-07-13 20:09:02,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:09:02,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:02,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:09:02,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:09:02,630 INFO L87 Difference]: Start difference. First operand 582 states and 1177 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:03,840 INFO L93 Difference]: Finished difference Result 760 states and 1501 transitions. [2021-07-13 20:09:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:09:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:03,842 INFO L225 Difference]: With dead ends: 760 [2021-07-13 20:09:03,842 INFO L226 Difference]: Without dead ends: 664 [2021-07-13 20:09:03,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1274.4ms TimeCoverageRelationStatistics Valid=302, Invalid=3238, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:09:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-07-13 20:09:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 596. [2021-07-13 20:09:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.030252100840336) internal successors, (1208), 595 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1208 transitions. [2021-07-13 20:09:03,850 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1208 transitions. Word has length 33 [2021-07-13 20:09:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:03,850 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1208 transitions. [2021-07-13 20:09:03,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1208 transitions. [2021-07-13 20:09:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:03,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:03,851 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:04,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:04,065 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1448689291, now seen corresponding path program 66 times [2021-07-13 20:09:04,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:04,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447153713] [2021-07-13 20:09:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:04,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:04,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447153713] [2021-07-13 20:09:04,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447153713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:04,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951372248] [2021-07-13 20:09:04,382 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 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 [2021-07-13 20:09:04,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:09:04,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:04,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:04,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:04,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:04,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:04,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:09:04,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:04,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:04,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:04,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:09:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:04,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951372248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:04,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:04,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:04,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250145086] [2021-07-13 20:09:04,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:04,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:04,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:04,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:04,900 INFO L87 Difference]: Start difference. First operand 596 states and 1208 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:06,417 INFO L93 Difference]: Finished difference Result 806 states and 1598 transitions. [2021-07-13 20:09:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:09:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:06,418 INFO L225 Difference]: With dead ends: 806 [2021-07-13 20:09:06,418 INFO L226 Difference]: Without dead ends: 711 [2021-07-13 20:09:06,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1533.5ms TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:09:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-07-13 20:09:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 599. [2021-07-13 20:09:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.0250836120401337) internal successors, (1211), 598 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1211 transitions. [2021-07-13 20:09:06,427 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1211 transitions. Word has length 33 [2021-07-13 20:09:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:06,427 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1211 transitions. [2021-07-13 20:09:06,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1211 transitions. [2021-07-13 20:09:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:06,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:06,428 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:06,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 20:09:06,650 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:06,651 INFO L82 PathProgramCache]: Analyzing trace with hash 807578701, now seen corresponding path program 67 times [2021-07-13 20:09:06,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:06,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354445553] [2021-07-13 20:09:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:06,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:06,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354445553] [2021-07-13 20:09:06,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354445553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:06,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869723788] [2021-07-13 20:09:06,913 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 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 [2021-07-13 20:09:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:06,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:06,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:07,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:07,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:07,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:07,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:07,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:07,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:07,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:09:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:07,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869723788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:07,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:07,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:07,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871296174] [2021-07-13 20:09:07,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:07,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:07,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:07,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:07,363 INFO L87 Difference]: Start difference. First operand 599 states and 1211 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:08,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:08,963 INFO L93 Difference]: Finished difference Result 830 states and 1647 transitions. [2021-07-13 20:09:08,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:09:08,964 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:08,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:08,965 INFO L225 Difference]: With dead ends: 830 [2021-07-13 20:09:08,965 INFO L226 Difference]: Without dead ends: 762 [2021-07-13 20:09:08,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1451.2ms TimeCoverageRelationStatistics Valid=412, Invalid=3494, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:09:08,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-07-13 20:09:08,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 600. [2021-07-13 20:09:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.025041736227045) internal successors, (1213), 599 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1213 transitions. [2021-07-13 20:09:08,973 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1213 transitions. Word has length 33 [2021-07-13 20:09:08,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:08,974 INFO L482 AbstractCegarLoop]: Abstraction has 600 states and 1213 transitions. [2021-07-13 20:09:08,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1213 transitions. [2021-07-13 20:09:08,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:08,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:08,975 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:09,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:09,189 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2061146229, now seen corresponding path program 68 times [2021-07-13 20:09:09,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:09,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053731612] [2021-07-13 20:09:09,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:09,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:09,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053731612] [2021-07-13 20:09:09,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053731612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:09,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479049287] [2021-07-13 20:09:09,439 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 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 [2021-07-13 20:09:09,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:09,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:09,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:09,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:09,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:09,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:09,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:09,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:09,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:09,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:09,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:09,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:09:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:09,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479049287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:09,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:09,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:09,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292733221] [2021-07-13 20:09:09,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:09,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:09,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:09,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:09,909 INFO L87 Difference]: Start difference. First operand 600 states and 1213 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:11,959 INFO L93 Difference]: Finished difference Result 939 states and 1863 transitions. [2021-07-13 20:09:11,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:09:11,959 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:11,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:11,961 INFO L225 Difference]: With dead ends: 939 [2021-07-13 20:09:11,961 INFO L226 Difference]: Without dead ends: 863 [2021-07-13 20:09:11,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1768.5ms TimeCoverageRelationStatistics Valid=540, Invalid=4862, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:09:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-07-13 20:09:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 602. [2021-07-13 20:09:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.0232945091514143) internal successors, (1216), 601 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1216 transitions. [2021-07-13 20:09:11,967 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1216 transitions. Word has length 33 [2021-07-13 20:09:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:11,967 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1216 transitions. [2021-07-13 20:09:11,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1216 transitions. [2021-07-13 20:09:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:11,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:11,968 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:12,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 20:09:12,169 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:12,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1319188321, now seen corresponding path program 69 times [2021-07-13 20:09:12,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:12,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173266281] [2021-07-13 20:09:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:12,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:12,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173266281] [2021-07-13 20:09:12,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173266281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:12,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959863040] [2021-07-13 20:09:12,435 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 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 [2021-07-13 20:09:12,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:09:12,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:12,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:12,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:12,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:12,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:12,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:12,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:12,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:12,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-13 20:09:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:12,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959863040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:12,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:12,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:12,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773132696] [2021-07-13 20:09:12,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:12,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:12,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:12,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:12,875 INFO L87 Difference]: Start difference. First operand 602 states and 1216 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:14,264 INFO L93 Difference]: Finished difference Result 762 states and 1508 transitions. [2021-07-13 20:09:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:09:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:14,273 INFO L225 Difference]: With dead ends: 762 [2021-07-13 20:09:14,274 INFO L226 Difference]: Without dead ends: 706 [2021-07-13 20:09:14,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1415.3ms TimeCoverageRelationStatistics Valid=359, Invalid=3547, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:09:14,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-07-13 20:09:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 595. [2021-07-13 20:09:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.025252525252525) internal successors, (1203), 594 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1203 transitions. [2021-07-13 20:09:14,282 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1203 transitions. Word has length 33 [2021-07-13 20:09:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:14,282 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1203 transitions. [2021-07-13 20:09:14,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1203 transitions. [2021-07-13 20:09:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:14,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:14,283 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:14,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:14,497 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:14,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:14,497 INFO L82 PathProgramCache]: Analyzing trace with hash -264248193, now seen corresponding path program 70 times [2021-07-13 20:09:14,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:14,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017447094] [2021-07-13 20:09:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:14,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:14,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017447094] [2021-07-13 20:09:14,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017447094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:14,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113321456] [2021-07-13 20:09:14,760 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 [2021-07-13 20:09:14,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:14,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:14,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:15,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:15,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:15,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:15,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:15,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:15,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:15,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:15,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:09:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:15,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113321456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:15,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:15,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:15,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482294065] [2021-07-13 20:09:15,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:15,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:15,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:15,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:15,214 INFO L87 Difference]: Start difference. First operand 595 states and 1203 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:16,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:16,241 INFO L93 Difference]: Finished difference Result 781 states and 1543 transitions. [2021-07-13 20:09:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:09:16,242 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:16,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:16,243 INFO L225 Difference]: With dead ends: 781 [2021-07-13 20:09:16,243 INFO L226 Difference]: Without dead ends: 685 [2021-07-13 20:09:16,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1169.9ms TimeCoverageRelationStatistics Valid=272, Invalid=2808, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:09:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-07-13 20:09:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 606. [2021-07-13 20:09:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.031404958677686) internal successors, (1229), 605 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1229 transitions. [2021-07-13 20:09:16,249 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1229 transitions. Word has length 33 [2021-07-13 20:09:16,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:16,250 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 1229 transitions. [2021-07-13 20:09:16,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:16,250 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1229 transitions. [2021-07-13 20:09:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:16,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:16,251 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:16,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 20:09:16,451 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:16,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:16,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1121374397, now seen corresponding path program 71 times [2021-07-13 20:09:16,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:16,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751842625] [2021-07-13 20:09:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:16,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:16,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751842625] [2021-07-13 20:09:16,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751842625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:16,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093660580] [2021-07-13 20:09:16,707 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 [2021-07-13 20:09:16,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:09:16,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:16,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:16,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:17,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:17,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:09:17,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:17,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:17,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:17,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:09:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:17,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093660580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:17,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:17,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:17,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75355761] [2021-07-13 20:09:17,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:17,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:17,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:17,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:17,142 INFO L87 Difference]: Start difference. First operand 606 states and 1229 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:18,908 INFO L93 Difference]: Finished difference Result 862 states and 1713 transitions. [2021-07-13 20:09:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:09:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:18,910 INFO L225 Difference]: With dead ends: 862 [2021-07-13 20:09:18,910 INFO L226 Difference]: Without dead ends: 760 [2021-07-13 20:09:18,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1597.1ms TimeCoverageRelationStatistics Valid=409, Invalid=4013, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:09:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-07-13 20:09:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 622. [2021-07-13 20:09:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.028985507246377) internal successors, (1260), 621 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1260 transitions. [2021-07-13 20:09:18,916 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1260 transitions. Word has length 33 [2021-07-13 20:09:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:18,916 INFO L482 AbstractCegarLoop]: Abstraction has 622 states and 1260 transitions. [2021-07-13 20:09:18,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:18,916 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1260 transitions. [2021-07-13 20:09:18,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:18,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:18,917 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:19,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:19,118 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:19,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:19,118 INFO L82 PathProgramCache]: Analyzing trace with hash 480263807, now seen corresponding path program 72 times [2021-07-13 20:09:19,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:19,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944661001] [2021-07-13 20:09:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:19,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:19,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944661001] [2021-07-13 20:09:19,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944661001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:19,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576343193] [2021-07-13 20:09:19,413 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 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 [2021-07-13 20:09:19,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:09:19,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:19,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:19,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:19,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:09:19,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:19,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:19,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:19,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:09:19,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:19,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576343193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:19,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:19,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:19,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443748548] [2021-07-13 20:09:19,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:19,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:19,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:19,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:19,820 INFO L87 Difference]: Start difference. First operand 622 states and 1260 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:22,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:22,177 INFO L93 Difference]: Finished difference Result 971 states and 1938 transitions. [2021-07-13 20:09:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:09:22,178 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:22,179 INFO L225 Difference]: With dead ends: 971 [2021-07-13 20:09:22,179 INFO L226 Difference]: Without dead ends: 884 [2021-07-13 20:09:22,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2050.1ms TimeCoverageRelationStatistics Valid=669, Invalid=6137, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:09:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-07-13 20:09:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 643. [2021-07-13 20:09:22,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.0373831775700935) internal successors, (1308), 642 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:22,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1308 transitions. [2021-07-13 20:09:22,186 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1308 transitions. Word has length 33 [2021-07-13 20:09:22,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:22,186 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1308 transitions. [2021-07-13 20:09:22,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:22,186 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1308 transitions. [2021-07-13 20:09:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:22,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:22,191 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:22,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:22,392 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:22,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1906506173, now seen corresponding path program 73 times [2021-07-13 20:09:22,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:22,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620074928] [2021-07-13 20:09:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:22,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:22,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620074928] [2021-07-13 20:09:22,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620074928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:22,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696595038] [2021-07-13 20:09:22,645 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 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 [2021-07-13 20:09:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:22,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:22,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:22,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:22,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:22,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:22,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:22,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:22,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:22,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:09:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:23,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696595038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:23,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:23,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:23,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091761251] [2021-07-13 20:09:23,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:23,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:23,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:23,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:23,071 INFO L87 Difference]: Start difference. First operand 643 states and 1308 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:26,398 INFO L93 Difference]: Finished difference Result 1084 states and 2162 transitions. [2021-07-13 20:09:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:09:26,398 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:26,400 INFO L225 Difference]: With dead ends: 1084 [2021-07-13 20:09:26,400 INFO L226 Difference]: Without dead ends: 1005 [2021-07-13 20:09:26,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 2672.5ms TimeCoverageRelationStatistics Valid=852, Invalid=8460, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 20:09:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-07-13 20:09:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 648. [2021-07-13 20:09:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.034003091190108) internal successors, (1316), 647 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1316 transitions. [2021-07-13 20:09:26,409 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1316 transitions. Word has length 33 [2021-07-13 20:09:26,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:26,409 INFO L482 AbstractCegarLoop]: Abstraction has 648 states and 1316 transitions. [2021-07-13 20:09:26,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:26,409 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1316 transitions. [2021-07-13 20:09:26,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:26,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:26,410 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:26,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:26,625 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:26,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:26,625 INFO L82 PathProgramCache]: Analyzing trace with hash 991873427, now seen corresponding path program 74 times [2021-07-13 20:09:26,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:26,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920725596] [2021-07-13 20:09:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:26,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:26,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920725596] [2021-07-13 20:09:26,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920725596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:26,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711883345] [2021-07-13 20:09:26,989 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 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 [2021-07-13 20:09:27,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:27,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:27,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:27,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:27,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:27,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:27,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:27,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:27,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:27,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:27,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-07-13 20:09:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:27,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711883345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:27,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:27,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:27,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181206504] [2021-07-13 20:09:27,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:27,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:27,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:27,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:27,591 INFO L87 Difference]: Start difference. First operand 648 states and 1316 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:29,617 INFO L93 Difference]: Finished difference Result 858 states and 1713 transitions. [2021-07-13 20:09:29,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:09:29,617 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:29,618 INFO L225 Difference]: With dead ends: 858 [2021-07-13 20:09:29,618 INFO L226 Difference]: Without dead ends: 799 [2021-07-13 20:09:29,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2022.1ms TimeCoverageRelationStatistics Valid=404, Invalid=3886, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:09:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-07-13 20:09:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 661. [2021-07-13 20:09:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.0393939393939395) internal successors, (1346), 660 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1346 transitions. [2021-07-13 20:09:29,626 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1346 transitions. Word has length 33 [2021-07-13 20:09:29,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:29,627 INFO L482 AbstractCegarLoop]: Abstraction has 661 states and 1346 transitions. [2021-07-13 20:09:29,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1346 transitions. [2021-07-13 20:09:29,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:29,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:29,629 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:29,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:29,851 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:29,852 INFO L82 PathProgramCache]: Analyzing trace with hash 995289705, now seen corresponding path program 75 times [2021-07-13 20:09:29,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:29,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400918819] [2021-07-13 20:09:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:30,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:30,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400918819] [2021-07-13 20:09:30,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400918819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:30,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384782613] [2021-07-13 20:09:30,220 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 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 [2021-07-13 20:09:30,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:09:30,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:30,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:30,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:30,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:30,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:30,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:30,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:30,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:30,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:30,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:09:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:30,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384782613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:30,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:30,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:30,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850987348] [2021-07-13 20:09:30,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:30,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:30,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:30,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:30,857 INFO L87 Difference]: Start difference. First operand 661 states and 1346 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:33,711 INFO L93 Difference]: Finished difference Result 923 states and 1836 transitions. [2021-07-13 20:09:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:09:33,711 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:33,712 INFO L225 Difference]: With dead ends: 923 [2021-07-13 20:09:33,713 INFO L226 Difference]: Without dead ends: 835 [2021-07-13 20:09:33,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 2526.9ms TimeCoverageRelationStatistics Valid=495, Invalid=5357, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:09:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-07-13 20:09:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 716. [2021-07-13 20:09:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.0377622377622377) internal successors, (1457), 715 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1457 transitions. [2021-07-13 20:09:33,721 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1457 transitions. Word has length 33 [2021-07-13 20:09:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:33,721 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1457 transitions. [2021-07-13 20:09:33,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1457 transitions. [2021-07-13 20:09:33,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:33,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:33,722 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:33,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:33,923 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:33,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:33,923 INFO L82 PathProgramCache]: Analyzing trace with hash 354179115, now seen corresponding path program 76 times [2021-07-13 20:09:33,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:33,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031816122] [2021-07-13 20:09:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:34,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:34,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031816122] [2021-07-13 20:09:34,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031816122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:34,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028002344] [2021-07-13 20:09:34,468 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 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 [2021-07-13 20:09:34,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:34,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:34,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:34,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:34,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:34,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:34,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:34,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:34,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:34,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:09:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:34,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028002344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:34,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:34,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:34,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247495774] [2021-07-13 20:09:34,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:34,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:34,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:34,990 INFO L87 Difference]: Start difference. First operand 716 states and 1457 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:37,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:37,955 INFO L93 Difference]: Finished difference Result 1025 states and 2053 transitions. [2021-07-13 20:09:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:09:37,955 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:37,957 INFO L225 Difference]: With dead ends: 1025 [2021-07-13 20:09:37,957 INFO L226 Difference]: Without dead ends: 945 [2021-07-13 20:09:37,957 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2782.6ms TimeCoverageRelationStatistics Valid=619, Invalid=6521, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:09:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-07-13 20:09:37,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 735. [2021-07-13 20:09:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.0395095367847413) internal successors, (1497), 734 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1497 transitions. [2021-07-13 20:09:37,966 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1497 transitions. Word has length 33 [2021-07-13 20:09:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:37,966 INFO L482 AbstractCegarLoop]: Abstraction has 735 states and 1497 transitions. [2021-07-13 20:09:37,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1497 transitions. [2021-07-13 20:09:37,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:37,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:37,968 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:38,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:38,173 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:38,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1780421481, now seen corresponding path program 77 times [2021-07-13 20:09:38,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:38,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691828375] [2021-07-13 20:09:38,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:38,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:38,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691828375] [2021-07-13 20:09:38,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691828375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:38,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70719231] [2021-07-13 20:09:38,528 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 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 [2021-07-13 20:09:38,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:09:38,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:38,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:38,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:38,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:38,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:38,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:09:38,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:38,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:38,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:38,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:09:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:39,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70719231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:39,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:39,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:39,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704518929] [2021-07-13 20:09:39,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:39,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:39,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:39,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:39,056 INFO L87 Difference]: Start difference. First operand 735 states and 1497 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:42,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:42,183 INFO L93 Difference]: Finished difference Result 999 states and 2002 transitions. [2021-07-13 20:09:42,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:09:42,183 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:42,185 INFO L225 Difference]: With dead ends: 999 [2021-07-13 20:09:42,185 INFO L226 Difference]: Without dead ends: 943 [2021-07-13 20:09:42,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 2740.3ms TimeCoverageRelationStatistics Valid=706, Invalid=7304, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:09:42,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-13 20:09:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 734. [2021-07-13 20:09:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.03956343792633) internal successors, (1495), 733 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1495 transitions. [2021-07-13 20:09:42,194 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1495 transitions. Word has length 33 [2021-07-13 20:09:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:42,195 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 1495 transitions. [2021-07-13 20:09:42,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1495 transitions. [2021-07-13 20:09:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:42,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:42,197 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:42,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:42,413 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:42,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1675574863, now seen corresponding path program 78 times [2021-07-13 20:09:42,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:42,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247793541] [2021-07-13 20:09:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:42,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:42,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247793541] [2021-07-13 20:09:42,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247793541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:42,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169585441] [2021-07-13 20:09:42,817 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 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 [2021-07-13 20:09:42,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:09:42,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:42,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:09:42,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:43,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:43,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:43,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:09:43,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:43,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:43,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:43,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:16 [2021-07-13 20:09:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:43,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169585441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:43,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:43,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:43,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456432623] [2021-07-13 20:09:43,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:43,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:43,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:43,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:43,370 INFO L87 Difference]: Start difference. First operand 734 states and 1495 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:45,380 INFO L93 Difference]: Finished difference Result 987 states and 1977 transitions. [2021-07-13 20:09:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:09:45,380 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:45,381 INFO L225 Difference]: With dead ends: 987 [2021-07-13 20:09:45,381 INFO L226 Difference]: Without dead ends: 931 [2021-07-13 20:09:45,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1937.4ms TimeCoverageRelationStatistics Valid=428, Invalid=3994, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:09:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-07-13 20:09:45,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 817. [2021-07-13 20:09:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 2.0379901960784315) internal successors, (1663), 816 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1663 transitions. [2021-07-13 20:09:45,390 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1663 transitions. Word has length 33 [2021-07-13 20:09:45,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:45,390 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 1663 transitions. [2021-07-13 20:09:45,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1663 transitions. [2021-07-13 20:09:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:45,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:45,391 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:45,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 20:09:45,592 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:45,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1261063915, now seen corresponding path program 79 times [2021-07-13 20:09:45,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:45,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548054322] [2021-07-13 20:09:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:46,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:46,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548054322] [2021-07-13 20:09:46,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548054322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:46,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387733795] [2021-07-13 20:09:46,162 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 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 [2021-07-13 20:09:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:46,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:46,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:46,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:46,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:46,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:46,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:46,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:46,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:09:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:46,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387733795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:46,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:46,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:46,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810362039] [2021-07-13 20:09:46,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:46,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:46,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:46,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:46,817 INFO L87 Difference]: Start difference. First operand 817 states and 1663 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:48,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:48,051 INFO L93 Difference]: Finished difference Result 1026 states and 2044 transitions. [2021-07-13 20:09:48,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:09:48,052 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:48,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:48,053 INFO L225 Difference]: With dead ends: 1026 [2021-07-13 20:09:48,053 INFO L226 Difference]: Without dead ends: 930 [2021-07-13 20:09:48,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1589.9ms TimeCoverageRelationStatistics Valid=275, Invalid=2805, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:09:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-07-13 20:09:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 842. [2021-07-13 20:09:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.036860879904875) internal successors, (1713), 841 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:48,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1713 transitions. [2021-07-13 20:09:48,062 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1713 transitions. Word has length 33 [2021-07-13 20:09:48,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:48,062 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 1713 transitions. [2021-07-13 20:09:48,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1713 transitions. [2021-07-13 20:09:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:48,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:48,064 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:48,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:48,277 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash 124558675, now seen corresponding path program 80 times [2021-07-13 20:09:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:48,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192241227] [2021-07-13 20:09:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:48,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:48,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192241227] [2021-07-13 20:09:48,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192241227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:48,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654561080] [2021-07-13 20:09:48,557 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 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 [2021-07-13 20:09:48,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:09:48,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:48,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:48,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:48,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:48,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:48,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:48,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:48,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:48,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:48,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:09:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:49,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654561080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:49,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:49,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:49,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952597505] [2021-07-13 20:09:49,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:49,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:49,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:49,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:49,005 INFO L87 Difference]: Start difference. First operand 842 states and 1713 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:50,217 INFO L93 Difference]: Finished difference Result 1041 states and 2080 transitions. [2021-07-13 20:09:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:09:50,217 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:50,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:50,218 INFO L225 Difference]: With dead ends: 1041 [2021-07-13 20:09:50,218 INFO L226 Difference]: Without dead ends: 953 [2021-07-13 20:09:50,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1179.0ms TimeCoverageRelationStatistics Valid=279, Invalid=2801, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:09:50,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-07-13 20:09:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 845. [2021-07-13 20:09:50,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.036729857819905) internal successors, (1719), 844 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1719 transitions. [2021-07-13 20:09:50,226 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1719 transitions. Word has length 33 [2021-07-13 20:09:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:50,227 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 1719 transitions. [2021-07-13 20:09:50,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1719 transitions. [2021-07-13 20:09:50,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:50,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:50,228 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:50,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 20:09:50,429 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash -516551915, now seen corresponding path program 81 times [2021-07-13 20:09:50,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:50,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034632865] [2021-07-13 20:09:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:50,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:50,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034632865] [2021-07-13 20:09:50,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034632865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:50,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691923952] [2021-07-13 20:09:50,705 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 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 [2021-07-13 20:09:50,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:09:50,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:50,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:50,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:50,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:50,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:50,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:50,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:50,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:50,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:50,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:50,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:09:51,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:51,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691923952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:51,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:51,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:51,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261979961] [2021-07-13 20:09:51,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:51,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:51,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:51,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:51,123 INFO L87 Difference]: Start difference. First operand 845 states and 1719 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:52,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:52,789 INFO L93 Difference]: Finished difference Result 1128 states and 2259 transitions. [2021-07-13 20:09:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:09:52,790 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:52,791 INFO L225 Difference]: With dead ends: 1128 [2021-07-13 20:09:52,791 INFO L226 Difference]: Without dead ends: 1032 [2021-07-13 20:09:52,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1599.6ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:09:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-07-13 20:09:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 850. [2021-07-13 20:09:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.035335689045936) internal successors, (1728), 849 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1728 transitions. [2021-07-13 20:09:52,802 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1728 transitions. Word has length 33 [2021-07-13 20:09:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:52,802 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 1728 transitions. [2021-07-13 20:09:52,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1728 transitions. [2021-07-13 20:09:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:52,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:52,804 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:53,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:53,017 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash 909690451, now seen corresponding path program 82 times [2021-07-13 20:09:53,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:53,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420063260] [2021-07-13 20:09:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:53,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:53,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420063260] [2021-07-13 20:09:53,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420063260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:53,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388757140] [2021-07-13 20:09:53,284 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 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 [2021-07-13 20:09:53,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:53,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:53,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:53,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:53,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:53,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:09:53,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:53,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:53,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:09:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:53,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388757140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:53,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:53,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-07-13 20:09:53,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119014545] [2021-07-13 20:09:53,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:09:53,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:53,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:09:53,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:09:53,689 INFO L87 Difference]: Start difference. First operand 850 states and 1728 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:56,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:56,036 INFO L93 Difference]: Finished difference Result 1294 states and 2586 transitions. [2021-07-13 20:09:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:09:56,036 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:56,038 INFO L225 Difference]: With dead ends: 1294 [2021-07-13 20:09:56,038 INFO L226 Difference]: Without dead ends: 1216 [2021-07-13 20:09:56,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 2024.0ms TimeCoverageRelationStatistics Valid=666, Invalid=6306, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:09:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-07-13 20:09:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 841. [2021-07-13 20:09:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.033333333333333) internal successors, (1708), 840 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1708 transitions. [2021-07-13 20:09:56,047 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1708 transitions. Word has length 33 [2021-07-13 20:09:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:56,047 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 1708 transitions. [2021-07-13 20:09:56,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1708 transitions. [2021-07-13 20:09:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:56,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:56,049 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:56,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:56,253 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:56,253 INFO L82 PathProgramCache]: Analyzing trace with hash -4942295, now seen corresponding path program 83 times [2021-07-13 20:09:56,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:56,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510978069] [2021-07-13 20:09:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:56,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:56,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510978069] [2021-07-13 20:09:56,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510978069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:56,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327933260] [2021-07-13 20:09:56,531 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 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 [2021-07-13 20:09:56,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:09:56,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:56,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:56,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:56,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:56,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:56,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:09:56,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:56,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:56,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:56,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:16 [2021-07-13 20:09:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:56,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327933260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:56,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:56,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-07-13 20:09:56,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512496684] [2021-07-13 20:09:56,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:09:56,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:56,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:09:56,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:09:56,986 INFO L87 Difference]: Start difference. First operand 841 states and 1708 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:58,692 INFO L93 Difference]: Finished difference Result 1073 states and 2135 transitions. [2021-07-13 20:09:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:09:58,693 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:09:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:58,694 INFO L225 Difference]: With dead ends: 1073 [2021-07-13 20:09:58,694 INFO L226 Difference]: Without dead ends: 995 [2021-07-13 20:09:58,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1692.0ms TimeCoverageRelationStatistics Valid=533, Invalid=5017, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:09:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-07-13 20:09:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 862. [2021-07-13 20:09:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.032520325203252) internal successors, (1750), 861 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1750 transitions. [2021-07-13 20:09:58,702 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1750 transitions. Word has length 33 [2021-07-13 20:09:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:58,702 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 1750 transitions. [2021-07-13 20:09:58,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1750 transitions. [2021-07-13 20:09:58,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:09:58,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:58,703 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:58,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:58,904 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:58,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:58,904 INFO L82 PathProgramCache]: Analyzing trace with hash 491236367, now seen corresponding path program 84 times [2021-07-13 20:09:58,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:58,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989603853] [2021-07-13 20:09:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:59,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:59,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989603853] [2021-07-13 20:09:59,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989603853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:59,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136055998] [2021-07-13 20:09:59,167 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 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 [2021-07-13 20:09:59,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:09:59,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:59,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:09:59,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:59,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:09:59,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:09:59,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:09:59,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:09:59,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:09:59,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-07-13 20:09:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:59,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136055998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:59,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:59,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-07-13 20:09:59,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658095793] [2021-07-13 20:09:59,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:09:59,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:59,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:09:59,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:09:59,649 INFO L87 Difference]: Start difference. First operand 862 states and 1750 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:00,881 INFO L93 Difference]: Finished difference Result 1056 states and 2102 transitions. [2021-07-13 20:10:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:10:00,881 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:00,882 INFO L225 Difference]: With dead ends: 1056 [2021-07-13 20:10:00,882 INFO L226 Difference]: Without dead ends: 968 [2021-07-13 20:10:00,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1192.9ms TimeCoverageRelationStatistics Valid=305, Invalid=2887, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:10:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-07-13 20:10:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 884. [2021-07-13 20:10:00,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.029445073612684) internal successors, (1792), 883 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1792 transitions. [2021-07-13 20:10:00,893 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1792 transitions. Word has length 33 [2021-07-13 20:10:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:00,893 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 1792 transitions. [2021-07-13 20:10:00,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1792 transitions. [2021-07-13 20:10:00,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:00,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:00,895 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:01,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:01,118 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:01,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:01,118 INFO L82 PathProgramCache]: Analyzing trace with hash -149874223, now seen corresponding path program 85 times [2021-07-13 20:10:01,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:01,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706468558] [2021-07-13 20:10:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:01,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:01,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706468558] [2021-07-13 20:10:01,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706468558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:01,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107560296] [2021-07-13 20:10:01,379 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 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 [2021-07-13 20:10:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:01,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:01,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:01,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:10:01,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:01,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:01,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:01,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:10:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:01,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107560296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:01,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:01,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-07-13 20:10:01,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132729839] [2021-07-13 20:10:01,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:10:01,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:01,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:10:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:10:01,789 INFO L87 Difference]: Start difference. First operand 884 states and 1792 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:03,312 INFO L93 Difference]: Finished difference Result 1078 states and 2150 transitions. [2021-07-13 20:10:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:10:03,312 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:03,314 INFO L225 Difference]: With dead ends: 1078 [2021-07-13 20:10:03,314 INFO L226 Difference]: Without dead ends: 1006 [2021-07-13 20:10:03,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1508.2ms TimeCoverageRelationStatistics Valid=408, Invalid=3752, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:10:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-07-13 20:10:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 885. [2021-07-13 20:10:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.0294117647058822) internal successors, (1794), 884 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1794 transitions. [2021-07-13 20:10:03,326 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1794 transitions. Word has length 33 [2021-07-13 20:10:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:03,326 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1794 transitions. [2021-07-13 20:10:03,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:03,326 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1794 transitions. [2021-07-13 20:10:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:03,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:03,328 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:03,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:03,541 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1276368143, now seen corresponding path program 86 times [2021-07-13 20:10:03,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:03,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015852726] [2021-07-13 20:10:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:03,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:03,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015852726] [2021-07-13 20:10:03,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015852726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:03,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394353660] [2021-07-13 20:10:03,802 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 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 [2021-07-13 20:10:03,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:03,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:03,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:04,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:04,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:10:04,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:04,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:04,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:10:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:04,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394353660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:04,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:04,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-07-13 20:10:04,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606588401] [2021-07-13 20:10:04,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 20:10:04,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:04,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 20:10:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:10:04,192 INFO L87 Difference]: Start difference. First operand 885 states and 1794 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:06,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:06,285 INFO L93 Difference]: Finished difference Result 1116 states and 2231 transitions. [2021-07-13 20:10:06,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:10:06,286 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:06,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:06,287 INFO L225 Difference]: With dead ends: 1116 [2021-07-13 20:10:06,287 INFO L226 Difference]: Without dead ends: 1054 [2021-07-13 20:10:06,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1795.3ms TimeCoverageRelationStatistics Valid=520, Invalid=4592, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:10:06,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-07-13 20:10:06,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 875. [2021-07-13 20:10:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.028604118993135) internal successors, (1773), 874 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1773 transitions. [2021-07-13 20:10:06,296 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1773 transitions. Word has length 33 [2021-07-13 20:10:06,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:06,296 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 1773 transitions. [2021-07-13 20:10:06,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:06,296 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1773 transitions. [2021-07-13 20:10:06,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:06,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:06,298 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:06,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:06,499 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:06,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:06,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1501435129, now seen corresponding path program 87 times [2021-07-13 20:10:06,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:06,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971783452] [2021-07-13 20:10:06,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:06,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:06,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971783452] [2021-07-13 20:10:06,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971783452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:06,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613458097] [2021-07-13 20:10:06,760 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 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 [2021-07-13 20:10:06,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:10:06,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:06,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:06,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:07,084 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:07,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:10:07,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:07,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:07,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:07,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:07,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613458097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:07,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:07,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:07,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230757549] [2021-07-13 20:10:07,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:07,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:07,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:07,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:07,201 INFO L87 Difference]: Start difference. First operand 875 states and 1773 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:08,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:08,069 INFO L93 Difference]: Finished difference Result 1029 states and 2048 transitions. [2021-07-13 20:10:08,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:10:08,069 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:08,070 INFO L225 Difference]: With dead ends: 1029 [2021-07-13 20:10:08,070 INFO L226 Difference]: Without dead ends: 981 [2021-07-13 20:10:08,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 947.7ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:10:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-07-13 20:10:08,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 896. [2021-07-13 20:10:08,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.029050279329609) internal successors, (1816), 895 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1816 transitions. [2021-07-13 20:10:08,079 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1816 transitions. Word has length 33 [2021-07-13 20:10:08,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:08,079 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 1816 transitions. [2021-07-13 20:10:08,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1816 transitions. [2021-07-13 20:10:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:08,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:08,081 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:08,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-13 20:10:08,281 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:08,282 INFO L82 PathProgramCache]: Analyzing trace with hash -222063415, now seen corresponding path program 88 times [2021-07-13 20:10:08,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:08,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742725588] [2021-07-13 20:10:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:08,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:08,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742725588] [2021-07-13 20:10:08,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742725588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:08,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502579547] [2021-07-13 20:10:08,540 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 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 [2021-07-13 20:10:08,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:08,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:08,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:08,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:08,850 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:08,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:10:08,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:08,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:08,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:08,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:10:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:08,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502579547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:08,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:08,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:08,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346117563] [2021-07-13 20:10:08,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:08,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:08,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:08,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:08,965 INFO L87 Difference]: Start difference. First operand 896 states and 1816 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:09,961 INFO L93 Difference]: Finished difference Result 1066 states and 2115 transitions. [2021-07-13 20:10:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:10:09,962 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:09,963 INFO L225 Difference]: With dead ends: 1066 [2021-07-13 20:10:09,963 INFO L226 Difference]: Without dead ends: 1018 [2021-07-13 20:10:09,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 929.2ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:10:09,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-07-13 20:10:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 897. [2021-07-13 20:10:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.029017857142857) internal successors, (1818), 896 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1818 transitions. [2021-07-13 20:10:09,975 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1818 transitions. Word has length 33 [2021-07-13 20:10:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:09,975 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 1818 transitions. [2021-07-13 20:10:09,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1818 transitions. [2021-07-13 20:10:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:09,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:09,977 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:10,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:10,197 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:10,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1163559175, now seen corresponding path program 89 times [2021-07-13 20:10:10,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:10,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379916969] [2021-07-13 20:10:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:10,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:10,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379916969] [2021-07-13 20:10:10,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379916969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:10,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622301801] [2021-07-13 20:10:10,433 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 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 [2021-07-13 20:10:10,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:10:10,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:10,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:10,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:10,707 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:10,707 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 25 treesize of output 13 [2021-07-13 20:10:10,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:10,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:10,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:10,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622301801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:10,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:10,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-07-13 20:10:10,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318833683] [2021-07-13 20:10:10,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:10:10,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:10,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:10:10,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:10:10,870 INFO L87 Difference]: Start difference. First operand 897 states and 1818 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:12,110 INFO L93 Difference]: Finished difference Result 1104 states and 2193 transitions. [2021-07-13 20:10:12,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:10:12,110 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:12,111 INFO L225 Difference]: With dead ends: 1104 [2021-07-13 20:10:12,111 INFO L226 Difference]: Without dead ends: 1056 [2021-07-13 20:10:12,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1040.1ms TimeCoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:10:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-07-13 20:10:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 901. [2021-07-13 20:10:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.028888888888889) internal successors, (1826), 900 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1826 transitions. [2021-07-13 20:10:12,120 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1826 transitions. Word has length 33 [2021-07-13 20:10:12,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:12,120 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 1826 transitions. [2021-07-13 20:10:12,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:12,120 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1826 transitions. [2021-07-13 20:10:12,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:12,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:12,121 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:12,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-13 20:10:12,322 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:12,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:12,322 INFO L82 PathProgramCache]: Analyzing trace with hash 522448585, now seen corresponding path program 90 times [2021-07-13 20:10:12,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:12,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133876106] [2021-07-13 20:10:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:12,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:12,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133876106] [2021-07-13 20:10:12,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133876106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:12,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562556309] [2021-07-13 20:10:12,623 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 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 [2021-07-13 20:10:12,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:10:12,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:12,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:10:12,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:12,943 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:12,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:10:12,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:12,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:12,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:12,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:13,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562556309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:13,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:13,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:13,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674242672] [2021-07-13 20:10:13,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:13,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:13,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:13,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:13,133 INFO L87 Difference]: Start difference. First operand 901 states and 1826 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:14,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:14,631 INFO L93 Difference]: Finished difference Result 1137 states and 2262 transitions. [2021-07-13 20:10:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:10:14,632 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:14,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:14,633 INFO L225 Difference]: With dead ends: 1137 [2021-07-13 20:10:14,633 INFO L226 Difference]: Without dead ends: 1105 [2021-07-13 20:10:14,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1413.7ms TimeCoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:10:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-07-13 20:10:14,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 902. [2021-07-13 20:10:14,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.0288568257491675) internal successors, (1828), 901 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:14,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1828 transitions. [2021-07-13 20:10:14,644 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1828 transitions. Word has length 33 [2021-07-13 20:10:14,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:14,644 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 1828 transitions. [2021-07-13 20:10:14,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:14,644 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1828 transitions. [2021-07-13 20:10:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:14,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:14,646 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:14,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:14,869 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1948690951, now seen corresponding path program 91 times [2021-07-13 20:10:14,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:14,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863385337] [2021-07-13 20:10:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:15,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:15,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863385337] [2021-07-13 20:10:15,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863385337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:15,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385326873] [2021-07-13 20:10:15,335 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 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 [2021-07-13 20:10:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:15,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:15,670 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:15,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:10:15,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:15,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:15,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:15,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:15,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385326873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:15,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:15,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:15,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8261577] [2021-07-13 20:10:15,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:15,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:15,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:15,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:15,845 INFO L87 Difference]: Start difference. First operand 902 states and 1828 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:17,811 INFO L93 Difference]: Finished difference Result 1204 states and 2391 transitions. [2021-07-13 20:10:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:10:17,811 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:17,813 INFO L225 Difference]: With dead ends: 1204 [2021-07-13 20:10:17,813 INFO L226 Difference]: Without dead ends: 1160 [2021-07-13 20:10:17,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1735.8ms TimeCoverageRelationStatistics Valid=303, Invalid=3237, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:10:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-07-13 20:10:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 898. [2021-07-13 20:10:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.0256410256410255) internal successors, (1817), 897 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1817 transitions. [2021-07-13 20:10:17,824 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1817 transitions. Word has length 33 [2021-07-13 20:10:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:17,825 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 1817 transitions. [2021-07-13 20:10:17,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1817 transitions. [2021-07-13 20:10:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:17,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:17,826 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:18,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 20:10:18,040 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1310975239, now seen corresponding path program 92 times [2021-07-13 20:10:18,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:18,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995854538] [2021-07-13 20:10:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:18,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:18,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995854538] [2021-07-13 20:10:18,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995854538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:18,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943280984] [2021-07-13 20:10:18,333 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 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 [2021-07-13 20:10:18,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:18,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:18,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:18,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:18,612 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:18,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:10:18,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:18,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:18,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:18,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:10:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:18,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943280984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:18,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:18,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:18,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419947640] [2021-07-13 20:10:18,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:18,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:18,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:18,844 INFO L87 Difference]: Start difference. First operand 898 states and 1817 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:19,942 INFO L93 Difference]: Finished difference Result 1027 states and 2063 transitions. [2021-07-13 20:10:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:10:19,942 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:19,944 INFO L225 Difference]: With dead ends: 1027 [2021-07-13 20:10:19,944 INFO L226 Difference]: Without dead ends: 999 [2021-07-13 20:10:19,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1215.5ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:10:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-07-13 20:10:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 890. [2021-07-13 20:10:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.0258717660292462) internal successors, (1801), 889 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1801 transitions. [2021-07-13 20:10:19,954 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1801 transitions. Word has length 33 [2021-07-13 20:10:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:19,955 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 1801 transitions. [2021-07-13 20:10:19,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1801 transitions. [2021-07-13 20:10:19,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:19,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:19,956 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:20,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 20:10:20,173 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:20,173 INFO L82 PathProgramCache]: Analyzing trace with hash -507368251, now seen corresponding path program 93 times [2021-07-13 20:10:20,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:20,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850391100] [2021-07-13 20:10:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:20,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:20,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850391100] [2021-07-13 20:10:20,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850391100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:20,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588117030] [2021-07-13 20:10:20,480 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 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 [2021-07-13 20:10:20,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:10:20,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:20,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:20,851 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:20,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:10:20,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:20,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:20,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:20,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:21,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588117030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:21,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:21,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:21,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288157764] [2021-07-13 20:10:21,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:21,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:21,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:21,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:21,012 INFO L87 Difference]: Start difference. First operand 890 states and 1801 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:22,574 INFO L93 Difference]: Finished difference Result 1070 states and 2128 transitions. [2021-07-13 20:10:22,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:10:22,575 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:22,576 INFO L225 Difference]: With dead ends: 1070 [2021-07-13 20:10:22,576 INFO L226 Difference]: Without dead ends: 974 [2021-07-13 20:10:22,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1531.8ms TimeCoverageRelationStatistics Valid=292, Invalid=3130, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:10:22,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-07-13 20:10:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 907. [2021-07-13 20:10:22,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0275938189845473) internal successors, (1837), 906 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:22,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1837 transitions. [2021-07-13 20:10:22,587 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1837 transitions. Word has length 33 [2021-07-13 20:10:22,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:22,587 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 1837 transitions. [2021-07-13 20:10:22,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1837 transitions. [2021-07-13 20:10:22,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:22,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:22,591 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:22,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 20:10:22,816 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash 878254339, now seen corresponding path program 94 times [2021-07-13 20:10:22,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:22,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156130321] [2021-07-13 20:10:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:23,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:23,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156130321] [2021-07-13 20:10:23,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156130321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:23,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506420656] [2021-07-13 20:10:23,145 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 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 [2021-07-13 20:10:23,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:23,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:23,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:23,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:23,513 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:23,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:10:23,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:23,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:23,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:23,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:10:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:23,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506420656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:23,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:23,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:23,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420309929] [2021-07-13 20:10:23,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:23,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:23,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:23,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:23,659 INFO L87 Difference]: Start difference. First operand 907 states and 1837 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:25,796 INFO L93 Difference]: Finished difference Result 1128 states and 2252 transitions. [2021-07-13 20:10:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:10:25,796 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:25,798 INFO L225 Difference]: With dead ends: 1128 [2021-07-13 20:10:25,798 INFO L226 Difference]: Without dead ends: 1033 [2021-07-13 20:10:25,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1851.9ms TimeCoverageRelationStatistics Valid=383, Invalid=3907, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:10:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-07-13 20:10:25,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 916. [2021-07-13 20:10:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.0273224043715845) internal successors, (1855), 915 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1855 transitions. [2021-07-13 20:10:25,814 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1855 transitions. Word has length 33 [2021-07-13 20:10:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:25,814 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 1855 transitions. [2021-07-13 20:10:25,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1855 transitions. [2021-07-13 20:10:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:25,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:25,815 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:26,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:26,033 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash 237143749, now seen corresponding path program 95 times [2021-07-13 20:10:26,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:26,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905399554] [2021-07-13 20:10:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:26,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:26,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905399554] [2021-07-13 20:10:26,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905399554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:26,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553800661] [2021-07-13 20:10:26,359 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 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 [2021-07-13 20:10:26,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:10:26,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:26,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:10:26,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:26,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:26,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:10:26,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:10:26,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:10:26,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:26,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:26,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:26,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-07-13 20:10:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:26,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553800661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:26,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:26,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-07-13 20:10:26,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392387506] [2021-07-13 20:10:26,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:10:26,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:26,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:10:26,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:10:26,984 INFO L87 Difference]: Start difference. First operand 916 states and 1855 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:29,800 INFO L93 Difference]: Finished difference Result 1153 states and 2299 transitions. [2021-07-13 20:10:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:10:29,801 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:29,803 INFO L225 Difference]: With dead ends: 1153 [2021-07-13 20:10:29,803 INFO L226 Difference]: Without dead ends: 1073 [2021-07-13 20:10:29,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 2395.7ms TimeCoverageRelationStatistics Valid=582, Invalid=5270, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:10:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-07-13 20:10:29,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 912. [2021-07-13 20:10:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.0241492864983535) internal successors, (1844), 911 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1844 transitions. [2021-07-13 20:10:29,829 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1844 transitions. Word has length 33 [2021-07-13 20:10:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:29,830 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 1844 transitions. [2021-07-13 20:10:29,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:29,830 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1844 transitions. [2021-07-13 20:10:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:29,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:29,831 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:30,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 20:10:30,055 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:30,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:30,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1663386115, now seen corresponding path program 96 times [2021-07-13 20:10:30,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:30,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240320877] [2021-07-13 20:10:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:30,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:30,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240320877] [2021-07-13 20:10:30,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240320877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:30,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734444716] [2021-07-13 20:10:30,353 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 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 [2021-07-13 20:10:30,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:10:30,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:30,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:10:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:30,665 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:30,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:10:30,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:30,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:30,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:30,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734444716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:30,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:30,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:30,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942808347] [2021-07-13 20:10:30,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:30,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:30,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:30,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:30,859 INFO L87 Difference]: Start difference. First operand 912 states and 1844 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:33,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:33,598 INFO L93 Difference]: Finished difference Result 1223 states and 2439 transitions. [2021-07-13 20:10:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:10:33,598 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:33,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:33,600 INFO L225 Difference]: With dead ends: 1223 [2021-07-13 20:10:33,600 INFO L226 Difference]: Without dead ends: 1164 [2021-07-13 20:10:33,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 2266.7ms TimeCoverageRelationStatistics Valid=559, Invalid=4843, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:10:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-13 20:10:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 907. [2021-07-13 20:10:33,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0242825607064017) internal successors, (1834), 906 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1834 transitions. [2021-07-13 20:10:33,609 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1834 transitions. Word has length 33 [2021-07-13 20:10:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:33,610 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 1834 transitions. [2021-07-13 20:10:33,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1834 transitions. [2021-07-13 20:10:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:33,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:33,611 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:33,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:33,812 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:33,812 INFO L82 PathProgramCache]: Analyzing trace with hash 748753369, now seen corresponding path program 97 times [2021-07-13 20:10:33,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:33,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858014613] [2021-07-13 20:10:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:34,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:34,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858014613] [2021-07-13 20:10:34,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858014613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:34,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201819536] [2021-07-13 20:10:34,153 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 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 [2021-07-13 20:10:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:34,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:34,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:34,442 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:34,442 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 29 treesize of output 13 [2021-07-13 20:10:34,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:34,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:34,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:34,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:10:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:34,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201819536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:34,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:34,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:34,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065667367] [2021-07-13 20:10:34,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:34,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:34,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:34,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:34,674 INFO L87 Difference]: Start difference. First operand 907 states and 1834 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:36,982 INFO L93 Difference]: Finished difference Result 1093 states and 2183 transitions. [2021-07-13 20:10:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:10:36,982 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:36,983 INFO L225 Difference]: With dead ends: 1093 [2021-07-13 20:10:36,984 INFO L226 Difference]: Without dead ends: 1034 [2021-07-13 20:10:36,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2152.6ms TimeCoverageRelationStatistics Valid=413, Invalid=4009, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:10:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-07-13 20:10:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 922. [2021-07-13 20:10:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.023887079261672) internal successors, (1864), 921 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1864 transitions. [2021-07-13 20:10:36,992 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1864 transitions. Word has length 33 [2021-07-13 20:10:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:36,992 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 1864 transitions. [2021-07-13 20:10:36,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1864 transitions. [2021-07-13 20:10:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:36,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:36,993 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:37,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 20:10:37,195 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:37,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:37,195 INFO L82 PathProgramCache]: Analyzing trace with hash -834683145, now seen corresponding path program 98 times [2021-07-13 20:10:37,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:37,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10709022] [2021-07-13 20:10:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:37,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:37,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10709022] [2021-07-13 20:10:37,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10709022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:37,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734716774] [2021-07-13 20:10:37,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:10:37,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:37,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:38,037 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:38,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:10:38,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:38,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:38,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:38,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:10:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:38,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734716774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:38,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:38,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:38,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496170400] [2021-07-13 20:10:38,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:38,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:38,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:38,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:38,181 INFO L87 Difference]: Start difference. First operand 922 states and 1864 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:39,539 INFO L93 Difference]: Finished difference Result 1156 states and 2301 transitions. [2021-07-13 20:10:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:10:39,539 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:39,540 INFO L225 Difference]: With dead ends: 1156 [2021-07-13 20:10:39,540 INFO L226 Difference]: Without dead ends: 1060 [2021-07-13 20:10:39,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1451.1ms TimeCoverageRelationStatistics Valid=287, Invalid=3019, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:10:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-07-13 20:10:39,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 966. [2021-07-13 20:10:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 2.0300518134715024) internal successors, (1959), 965 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1959 transitions. [2021-07-13 20:10:39,549 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1959 transitions. Word has length 33 [2021-07-13 20:10:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:39,549 INFO L482 AbstractCegarLoop]: Abstraction has 966 states and 1959 transitions. [2021-07-13 20:10:39,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1959 transitions. [2021-07-13 20:10:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:39,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:39,550 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:39,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:39,751 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:39,751 INFO L82 PathProgramCache]: Analyzing trace with hash 550939445, now seen corresponding path program 99 times [2021-07-13 20:10:39,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:39,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871822479] [2021-07-13 20:10:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:40,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:40,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871822479] [2021-07-13 20:10:40,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871822479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:40,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590053716] [2021-07-13 20:10:40,023 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 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 [2021-07-13 20:10:40,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:10:40,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:40,328 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:40,328 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 25 treesize of output 13 [2021-07-13 20:10:40,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:40,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:40,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:40,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:40,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590053716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:40,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:40,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:40,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259123000] [2021-07-13 20:10:40,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:40,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:40,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:40,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:40,439 INFO L87 Difference]: Start difference. First operand 966 states and 1959 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:42,252 INFO L93 Difference]: Finished difference Result 1272 states and 2548 transitions. [2021-07-13 20:10:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:10:42,252 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:42,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:42,254 INFO L225 Difference]: With dead ends: 1272 [2021-07-13 20:10:42,254 INFO L226 Difference]: Without dead ends: 1170 [2021-07-13 20:10:42,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 1651.3ms TimeCoverageRelationStatistics Valid=447, Invalid=4523, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:10:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-07-13 20:10:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1008. [2021-07-13 20:10:42,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.034756703078451) internal successors, (2049), 1007 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2049 transitions. [2021-07-13 20:10:42,263 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2049 transitions. Word has length 33 [2021-07-13 20:10:42,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:42,263 INFO L482 AbstractCegarLoop]: Abstraction has 1008 states and 2049 transitions. [2021-07-13 20:10:42,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:42,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2049 transitions. [2021-07-13 20:10:42,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:42,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:42,264 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:42,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:42,465 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash -90171145, now seen corresponding path program 100 times [2021-07-13 20:10:42,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:42,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68684704] [2021-07-13 20:10:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:42,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:42,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68684704] [2021-07-13 20:10:42,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68684704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:42,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483076444] [2021-07-13 20:10:42,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:10:42,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:10:42,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:42,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:42,961 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:42,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:10:42,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:42,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:42,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:42,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:43,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483076444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:43,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:43,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:43,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553453017] [2021-07-13 20:10:43,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:43,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:43,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:43,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:43,102 INFO L87 Difference]: Start difference. First operand 1008 states and 2049 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:45,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:45,461 INFO L93 Difference]: Finished difference Result 1420 states and 2865 transitions. [2021-07-13 20:10:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:10:45,461 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:45,463 INFO L225 Difference]: With dead ends: 1420 [2021-07-13 20:10:45,463 INFO L226 Difference]: Without dead ends: 1321 [2021-07-13 20:10:45,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 2149.4ms TimeCoverageRelationStatistics Valid=758, Invalid=7074, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:10:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-07-13 20:10:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1033. [2021-07-13 20:10:45,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.0339147286821704) internal successors, (2099), 1032 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2099 transitions. [2021-07-13 20:10:45,472 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2099 transitions. Word has length 33 [2021-07-13 20:10:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:45,473 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2099 transitions. [2021-07-13 20:10:45,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2099 transitions. [2021-07-13 20:10:45,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:45,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:45,474 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:45,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-07-13 20:10:45,674 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:45,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1336071221, now seen corresponding path program 101 times [2021-07-13 20:10:45,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:45,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703653434] [2021-07-13 20:10:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:45,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:45,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703653434] [2021-07-13 20:10:45,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703653434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:45,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130199668] [2021-07-13 20:10:45,940 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 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 [2021-07-13 20:10:45,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:10:45,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:45,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:10:45,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:46,191 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:46,191 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 25 treesize of output 13 [2021-07-13 20:10:46,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:46,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:46,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:46,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:10:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:46,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130199668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:46,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:46,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:46,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952730255] [2021-07-13 20:10:46,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:46,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:46,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:46,333 INFO L87 Difference]: Start difference. First operand 1033 states and 2099 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:49,229 INFO L93 Difference]: Finished difference Result 1535 states and 3095 transitions. [2021-07-13 20:10:49,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:10:49,229 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:49,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:49,231 INFO L225 Difference]: With dead ends: 1535 [2021-07-13 20:10:49,231 INFO L226 Difference]: Without dead ends: 1473 [2021-07-13 20:10:49,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 2258.9ms TimeCoverageRelationStatistics Valid=799, Invalid=7757, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:10:49,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-07-13 20:10:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1125. [2021-07-13 20:10:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.038256227758007) internal successors, (2291), 1124 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2291 transitions. [2021-07-13 20:10:49,247 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2291 transitions. Word has length 33 [2021-07-13 20:10:49,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:49,247 INFO L482 AbstractCegarLoop]: Abstraction has 1125 states and 2291 transitions. [2021-07-13 20:10:49,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:49,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2291 transitions. [2021-07-13 20:10:49,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:49,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:49,249 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:49,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:49,449 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:49,450 INFO L82 PathProgramCache]: Analyzing trace with hash 421438475, now seen corresponding path program 102 times [2021-07-13 20:10:49,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:49,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344639681] [2021-07-13 20:10:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:49,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:49,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344639681] [2021-07-13 20:10:49,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344639681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:49,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153715948] [2021-07-13 20:10:49,704 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 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 [2021-07-13 20:10:49,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:10:49,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:49,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:10:49,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:49,917 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:10:49,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:10:49,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:49,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:49,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:49,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:10:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:50,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153715948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:50,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:50,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:50,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669134938] [2021-07-13 20:10:50,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:50,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:50,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:50,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:50,091 INFO L87 Difference]: Start difference. First operand 1125 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:51,642 INFO L93 Difference]: Finished difference Result 1427 states and 2865 transitions. [2021-07-13 20:10:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:10:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:51,644 INFO L225 Difference]: With dead ends: 1427 [2021-07-13 20:10:51,644 INFO L226 Difference]: Without dead ends: 1371 [2021-07-13 20:10:51,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1421.9ms TimeCoverageRelationStatistics Valid=411, Invalid=3879, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:10:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-07-13 20:10:51,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1213. [2021-07-13 20:10:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.0354785478547854) internal successors, (2467), 1212 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2467 transitions. [2021-07-13 20:10:51,654 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2467 transitions. Word has length 33 [2021-07-13 20:10:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:51,654 INFO L482 AbstractCegarLoop]: Abstraction has 1213 states and 2467 transitions. [2021-07-13 20:10:51,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:51,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2467 transitions. [2021-07-13 20:10:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:51,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:51,656 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:51,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:51,856 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:51,857 INFO L82 PathProgramCache]: Analyzing trace with hash 424854753, now seen corresponding path program 103 times [2021-07-13 20:10:51,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:51,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756490760] [2021-07-13 20:10:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:52,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:52,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756490760] [2021-07-13 20:10:52,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756490760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:52,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382445081] [2021-07-13 20:10:52,126 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 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 [2021-07-13 20:10:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:52,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:52,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:52,394 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:52,394 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 29 treesize of output 13 [2021-07-13 20:10:52,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:52,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:52,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:52,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:10:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:52,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382445081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:52,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:52,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:52,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303528694] [2021-07-13 20:10:52,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:52,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:52,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:52,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:52,523 INFO L87 Difference]: Start difference. First operand 1213 states and 2467 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:54,921 INFO L93 Difference]: Finished difference Result 1723 states and 3477 transitions. [2021-07-13 20:10:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:10:54,921 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:54,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:54,923 INFO L225 Difference]: With dead ends: 1723 [2021-07-13 20:10:54,924 INFO L226 Difference]: Without dead ends: 1635 [2021-07-13 20:10:54,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 2097.2ms TimeCoverageRelationStatistics Valid=518, Invalid=5488, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:10:54,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-07-13 20:10:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1449. [2021-07-13 20:10:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 2.033839779005525) internal successors, (2945), 1448 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) [2021-07-13 20:10:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2945 transitions. [2021-07-13 20:10:54,939 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2945 transitions. Word has length 33 [2021-07-13 20:10:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:54,939 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 2945 transitions. [2021-07-13 20:10:54,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2945 transitions. [2021-07-13 20:10:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:54,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:54,941 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:55,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 20:10:55,157 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:55,157 INFO L82 PathProgramCache]: Analyzing trace with hash -216255837, now seen corresponding path program 104 times [2021-07-13 20:10:55,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:55,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194226885] [2021-07-13 20:10:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:55,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194226885] [2021-07-13 20:10:55,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194226885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996629343] [2021-07-13 20:10:55,488 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 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 [2021-07-13 20:10:55,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:10:55,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:55,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:10:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:55,794 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:10:55,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:10:55,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:10:55,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:10:55,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:10:55,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:10:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:55,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996629343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:55,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:55,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:10:55,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659363504] [2021-07-13 20:10:55,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:10:55,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:55,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:10:55,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:10:55,972 INFO L87 Difference]: Start difference. First operand 1449 states and 2945 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:59,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:59,236 INFO L93 Difference]: Finished difference Result 1938 states and 3950 transitions. [2021-07-13 20:10:59,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:10:59,237 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:10:59,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:59,239 INFO L225 Difference]: With dead ends: 1938 [2021-07-13 20:10:59,239 INFO L226 Difference]: Without dead ends: 1858 [2021-07-13 20:10:59,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2733.4ms TimeCoverageRelationStatistics Valid=642, Invalid=6668, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:10:59,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-07-13 20:10:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1298. [2021-07-13 20:10:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.0323824209714725) internal successors, (2636), 1297 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2636 transitions. [2021-07-13 20:10:59,253 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2636 transitions. Word has length 33 [2021-07-13 20:10:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:59,253 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 2636 transitions. [2021-07-13 20:10:59,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2636 transitions. [2021-07-13 20:10:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:10:59,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:59,255 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:59,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 20:10:59,478 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:59,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1209986529, now seen corresponding path program 105 times [2021-07-13 20:10:59,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:59,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168207341] [2021-07-13 20:10:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:59,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:59,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168207341] [2021-07-13 20:10:59,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168207341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:59,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133807611] [2021-07-13 20:10:59,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:59,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:10:59,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:59,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:00,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:00,338 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:00,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:11:00,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:00,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:00,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:00,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:11:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:00,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133807611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:00,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:00,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:00,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304434469] [2021-07-13 20:11:00,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:00,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:00,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:00,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:00,514 INFO L87 Difference]: Start difference. First operand 1298 states and 2636 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:04,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:04,030 INFO L93 Difference]: Finished difference Result 1677 states and 3376 transitions. [2021-07-13 20:11:04,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:11:04,031 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:04,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:04,033 INFO L225 Difference]: With dead ends: 1677 [2021-07-13 20:11:04,033 INFO L226 Difference]: Without dead ends: 1621 [2021-07-13 20:11:04,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 3147.5ms TimeCoverageRelationStatistics Valid=733, Invalid=7457, Unknown=0, NotChecked=0, Total=8190 [2021-07-13 20:11:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-07-13 20:11:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1260. [2021-07-13 20:11:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.0309769658459094) internal successors, (2557), 1259 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:04,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 2557 transitions. [2021-07-13 20:11:04,049 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 2557 transitions. Word has length 33 [2021-07-13 20:11:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:04,049 INFO L482 AbstractCegarLoop]: Abstraction has 1260 states and 2557 transitions. [2021-07-13 20:11:04,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 2557 transitions. [2021-07-13 20:11:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:04,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:04,051 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:04,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 20:11:04,274 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:04,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:04,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1105139911, now seen corresponding path program 106 times [2021-07-13 20:11:04,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:04,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284435742] [2021-07-13 20:11:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:04,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:04,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284435742] [2021-07-13 20:11:04,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284435742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:04,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565014987] [2021-07-13 20:11:04,660 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 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 [2021-07-13 20:11:04,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:04,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:04,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:04,897 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:04,897 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 25 treesize of output 13 [2021-07-13 20:11:04,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:04,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:04,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:04,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:11:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:05,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565014987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:05,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:05,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:05,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115771744] [2021-07-13 20:11:05,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:05,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:05,120 INFO L87 Difference]: Start difference. First operand 1260 states and 2557 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:06,778 INFO L93 Difference]: Finished difference Result 1761 states and 3540 transitions. [2021-07-13 20:11:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:11:06,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:06,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:06,781 INFO L225 Difference]: With dead ends: 1761 [2021-07-13 20:11:06,781 INFO L226 Difference]: Without dead ends: 1705 [2021-07-13 20:11:06,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 1707.1ms TimeCoverageRelationStatistics Valid=453, Invalid=4103, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:11:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-07-13 20:11:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1472. [2021-07-13 20:11:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-07-13 20:11:06,795 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-07-13 20:11:06,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:06,795 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-07-13 20:11:06,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:06,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-07-13 20:11:06,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:06,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:06,796 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:06,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:06,997 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1831498867, now seen corresponding path program 107 times [2021-07-13 20:11:06,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:06,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144614187] [2021-07-13 20:11:06,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:07,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:07,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144614187] [2021-07-13 20:11:07,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144614187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:07,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222050338] [2021-07-13 20:11:07,264 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 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 [2021-07-13 20:11:07,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:11:07,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:07,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:11:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:07,546 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:07,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:11:07,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:07,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:07,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:07,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:11:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:07,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222050338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:07,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:07,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:07,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914076089] [2021-07-13 20:11:07,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:07,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:07,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:07,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:07,655 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:08,629 INFO L93 Difference]: Finished difference Result 1677 states and 3355 transitions. [2021-07-13 20:11:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:11:08,630 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:08,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:08,632 INFO L225 Difference]: With dead ends: 1677 [2021-07-13 20:11:08,632 INFO L226 Difference]: Without dead ends: 1581 [2021-07-13 20:11:08,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1092.9ms TimeCoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:11:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-07-13 20:11:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1497. [2021-07-13 20:11:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.0267379679144386) internal successors, (3032), 1496 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:08,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 3032 transitions. [2021-07-13 20:11:08,644 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 3032 transitions. Word has length 33 [2021-07-13 20:11:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:08,645 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 3032 transitions. [2021-07-13 20:11:08,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:08,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 3032 transitions. [2021-07-13 20:11:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:08,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:08,646 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:08,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 20:11:08,847 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:08,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:08,847 INFO L82 PathProgramCache]: Analyzing trace with hash -445876277, now seen corresponding path program 108 times [2021-07-13 20:11:08,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:08,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701950300] [2021-07-13 20:11:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:09,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:09,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701950300] [2021-07-13 20:11:09,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701950300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:09,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116475128] [2021-07-13 20:11:09,162 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 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 [2021-07-13 20:11:09,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:11:09,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:09,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:11:09,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:09,441 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:09,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:11:09,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:09,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:09,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:09,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:11:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:09,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116475128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:09,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:09,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:09,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620746182] [2021-07-13 20:11:09,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:09,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:09,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:09,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:09,553 INFO L87 Difference]: Start difference. First operand 1497 states and 3032 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:10,661 INFO L93 Difference]: Finished difference Result 1692 states and 3391 transitions. [2021-07-13 20:11:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:11:10,661 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:10,663 INFO L225 Difference]: With dead ends: 1692 [2021-07-13 20:11:10,663 INFO L226 Difference]: Without dead ends: 1604 [2021-07-13 20:11:10,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1140.5ms TimeCoverageRelationStatistics Valid=294, Invalid=2898, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:11:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-07-13 20:11:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1500. [2021-07-13 20:11:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 2.026684456304203) internal successors, (3038), 1499 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 3038 transitions. [2021-07-13 20:11:10,679 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 3038 transitions. Word has length 33 [2021-07-13 20:11:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:10,679 INFO L482 AbstractCegarLoop]: Abstraction has 1500 states and 3038 transitions. [2021-07-13 20:11:10,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 3038 transitions. [2021-07-13 20:11:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:10,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:10,680 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:10,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 20:11:10,881 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:10,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:10,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1086986867, now seen corresponding path program 109 times [2021-07-13 20:11:10,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:10,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618833072] [2021-07-13 20:11:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:11,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:11,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618833072] [2021-07-13 20:11:11,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618833072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:11,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513954503] [2021-07-13 20:11:11,183 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 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 [2021-07-13 20:11:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:11,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:11,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:11,449 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:11,449 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 25 treesize of output 13 [2021-07-13 20:11:11,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:11,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:11,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:11,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:11:11,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:11,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513954503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:11,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:11,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:11,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957936268] [2021-07-13 20:11:11,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:11,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:11,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:11,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:11,580 INFO L87 Difference]: Start difference. First operand 1500 states and 3038 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:13,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:13,213 INFO L93 Difference]: Finished difference Result 1779 states and 3570 transitions. [2021-07-13 20:11:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:11:13,214 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:13,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:13,216 INFO L225 Difference]: With dead ends: 1779 [2021-07-13 20:11:13,216 INFO L226 Difference]: Without dead ends: 1683 [2021-07-13 20:11:13,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1578.2ms TimeCoverageRelationStatistics Valid=501, Invalid=4611, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:11:13,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-07-13 20:11:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1505. [2021-07-13 20:11:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.02593085106383) internal successors, (3047), 1504 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3047 transitions. [2021-07-13 20:11:13,229 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3047 transitions. Word has length 33 [2021-07-13 20:11:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:13,229 INFO L482 AbstractCegarLoop]: Abstraction has 1505 states and 3047 transitions. [2021-07-13 20:11:13,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3047 transitions. [2021-07-13 20:11:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:13,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:13,230 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:13,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 20:11:13,431 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:13,431 INFO L82 PathProgramCache]: Analyzing trace with hash 339255499, now seen corresponding path program 110 times [2021-07-13 20:11:13,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:13,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381034852] [2021-07-13 20:11:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:13,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:13,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381034852] [2021-07-13 20:11:13,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381034852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:13,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124070827] [2021-07-13 20:11:13,762 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 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 [2021-07-13 20:11:13,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:13,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:13,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:13,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:14,090 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:14,090 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 29 treesize of output 13 [2021-07-13 20:11:14,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:14,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:14,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:14,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:11:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:14,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124070827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:14,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:14,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:14,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331497799] [2021-07-13 20:11:14,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:14,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:14,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:14,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:14,258 INFO L87 Difference]: Start difference. First operand 1505 states and 3047 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:17,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:17,232 INFO L93 Difference]: Finished difference Result 1945 states and 3897 transitions. [2021-07-13 20:11:17,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:11:17,233 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:17,235 INFO L225 Difference]: With dead ends: 1945 [2021-07-13 20:11:17,236 INFO L226 Difference]: Without dead ends: 1867 [2021-07-13 20:11:17,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 2560.2ms TimeCoverageRelationStatistics Valid=689, Invalid=6451, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:11:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-07-13 20:11:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1496. [2021-07-13 20:11:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.0247491638795987) internal successors, (3027), 1495 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:17,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3027 transitions. [2021-07-13 20:11:17,280 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3027 transitions. Word has length 33 [2021-07-13 20:11:17,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:17,280 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3027 transitions. [2021-07-13 20:11:17,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3027 transitions. [2021-07-13 20:11:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:17,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:17,282 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:17,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:17,502 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:17,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:17,502 INFO L82 PathProgramCache]: Analyzing trace with hash -575377247, now seen corresponding path program 111 times [2021-07-13 20:11:17,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:17,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859731368] [2021-07-13 20:11:17,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:17,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:17,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859731368] [2021-07-13 20:11:17,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859731368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:17,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532843252] [2021-07-13 20:11:17,847 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 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 [2021-07-13 20:11:17,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:11:17,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:17,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:17,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:18,118 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:18,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:11:18,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:18,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:18,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:18,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:11:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:18,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532843252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:18,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:18,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:18,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672939195] [2021-07-13 20:11:18,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:18,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:18,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:18,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:18,330 INFO L87 Difference]: Start difference. First operand 1496 states and 3027 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:20,629 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:11:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:20,632 INFO L93 Difference]: Finished difference Result 1709 states and 3422 transitions. [2021-07-13 20:11:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:11:20,632 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:20,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:20,634 INFO L225 Difference]: With dead ends: 1709 [2021-07-13 20:11:20,634 INFO L226 Difference]: Without dead ends: 1647 [2021-07-13 20:11:20,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 2153.2ms TimeCoverageRelationStatistics Valid=509, Invalid=4747, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:11:20,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-07-13 20:11:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1473. [2021-07-13 20:11:20,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.027173913043478) internal successors, (2984), 1472 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2984 transitions. [2021-07-13 20:11:20,647 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2984 transitions. Word has length 33 [2021-07-13 20:11:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:20,647 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 2984 transitions. [2021-07-13 20:11:20,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2984 transitions. [2021-07-13 20:11:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:20,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:20,649 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:20,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:20,849 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:20,850 INFO L82 PathProgramCache]: Analyzing trace with hash -79198585, now seen corresponding path program 112 times [2021-07-13 20:11:20,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:20,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907360552] [2021-07-13 20:11:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:21,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:21,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907360552] [2021-07-13 20:11:21,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907360552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:21,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112167648] [2021-07-13 20:11:21,173 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 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 [2021-07-13 20:11:21,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:21,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:21,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:21,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:21,552 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:21,552 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 29 treesize of output 13 [2021-07-13 20:11:21,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:21,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:21,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:21,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:11:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:21,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112167648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:21,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:21,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-13 20:11:21,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010141452] [2021-07-13 20:11:21,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:11:21,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:21,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:11:21,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:11:21,688 INFO L87 Difference]: Start difference. First operand 1473 states and 2984 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:23,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:23,471 INFO L93 Difference]: Finished difference Result 1663 states and 3329 transitions. [2021-07-13 20:11:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:11:23,471 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:23,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:23,473 INFO L225 Difference]: With dead ends: 1663 [2021-07-13 20:11:23,473 INFO L226 Difference]: Without dead ends: 1575 [2021-07-13 20:11:23,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1722.9ms TimeCoverageRelationStatistics Valid=336, Invalid=3204, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:11:23,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-07-13 20:11:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1495. [2021-07-13 20:11:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0254350736278446) internal successors, (3026), 1494 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3026 transitions. [2021-07-13 20:11:23,491 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3026 transitions. Word has length 33 [2021-07-13 20:11:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:23,492 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 3026 transitions. [2021-07-13 20:11:23,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3026 transitions. [2021-07-13 20:11:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:23,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:23,497 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:23,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:23,698 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:23,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:23,699 INFO L82 PathProgramCache]: Analyzing trace with hash -720309175, now seen corresponding path program 113 times [2021-07-13 20:11:23,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:23,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716146115] [2021-07-13 20:11:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:24,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:24,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:24,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716146115] [2021-07-13 20:11:24,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716146115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:24,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8839483] [2021-07-13 20:11:24,065 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 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 [2021-07-13 20:11:24,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:11:24,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:24,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:11:24,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:24,308 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:24,309 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 25 treesize of output 13 [2021-07-13 20:11:24,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:24,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:24,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:24,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-07-13 20:11:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:24,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8839483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:24,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:24,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-13 20:11:24,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767184036] [2021-07-13 20:11:24,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:11:24,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:24,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:11:24,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:11:24,439 INFO L87 Difference]: Start difference. First operand 1495 states and 3026 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:25,849 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-07-13 20:11:25,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:11:25,849 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:25,851 INFO L225 Difference]: With dead ends: 1683 [2021-07-13 20:11:25,851 INFO L226 Difference]: Without dead ends: 1611 [2021-07-13 20:11:25,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1480.1ms TimeCoverageRelationStatistics Valid=430, Invalid=3860, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:11:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-07-13 20:11:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1496. [2021-07-13 20:11:25,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-07-13 20:11:25,864 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-07-13 20:11:25,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:25,864 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-07-13 20:11:25,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-07-13 20:11:25,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:25,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:25,866 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:26,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 20:11:26,067 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:26,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:26,067 INFO L82 PathProgramCache]: Analyzing trace with hash 705933191, now seen corresponding path program 114 times [2021-07-13 20:11:26,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:26,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059876417] [2021-07-13 20:11:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:26,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:26,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059876417] [2021-07-13 20:11:26,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059876417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:26,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282823633] [2021-07-13 20:11:26,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:11:26,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:11:26,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:26,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:26,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:26,564 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:26,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:11:26,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:26,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:26,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:26,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-07-13 20:11:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:26,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282823633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:26,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:26,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-13 20:11:26,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705710685] [2021-07-13 20:11:26,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:11:26,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:26,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:11:26,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:11:26,691 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:28,389 INFO L93 Difference]: Finished difference Result 1719 states and 3451 transitions. [2021-07-13 20:11:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:11:28,390 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:28,392 INFO L225 Difference]: With dead ends: 1719 [2021-07-13 20:11:28,392 INFO L226 Difference]: Without dead ends: 1657 [2021-07-13 20:11:28,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1682.7ms TimeCoverageRelationStatistics Valid=546, Invalid=4710, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:11:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-07-13 20:11:28,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1472. [2021-07-13 20:11:28,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-07-13 20:11:28,410 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-07-13 20:11:28,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:28,411 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-07-13 20:11:28,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:28,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-07-13 20:11:28,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:28,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:28,413 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:28,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 20:11:28,636 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:28,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583481, now seen corresponding path program 115 times [2021-07-13 20:11:28,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:28,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589811221] [2021-07-13 20:11:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:28,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:28,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589811221] [2021-07-13 20:11:28,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589811221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:28,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499137739] [2021-07-13 20:11:28,891 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 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 [2021-07-13 20:11:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:28,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:28,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:29,219 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:29,219 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 36 treesize of output 16 [2021-07-13 20:11:29,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:29,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:29,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:29,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:11:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:29,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499137739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:29,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:29,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:29,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687979040] [2021-07-13 20:11:29,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:29,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:29,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:29,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:29,349 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:30,619 INFO L93 Difference]: Finished difference Result 1608 states and 3221 transitions. [2021-07-13 20:11:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:11:30,620 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:30,621 INFO L225 Difference]: With dead ends: 1608 [2021-07-13 20:11:30,621 INFO L226 Difference]: Without dead ends: 1560 [2021-07-13 20:11:30,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1063.1ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:11:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-07-13 20:11:30,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1483. [2021-07-13 20:11:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.0276653171390016) internal successors, (3005), 1482 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3005 transitions. [2021-07-13 20:11:30,634 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3005 transitions. Word has length 33 [2021-07-13 20:11:30,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:30,634 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 3005 transitions. [2021-07-13 20:11:30,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3005 transitions. [2021-07-13 20:11:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:30,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:30,636 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:30,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 20:11:30,836 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:30,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:30,837 INFO L82 PathProgramCache]: Analyzing trace with hash -492211767, now seen corresponding path program 116 times [2021-07-13 20:11:30,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:30,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207968215] [2021-07-13 20:11:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:31,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:31,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207968215] [2021-07-13 20:11:31,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207968215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:31,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764504532] [2021-07-13 20:11:31,140 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 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 [2021-07-13 20:11:31,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:31,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:31,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:31,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:31,478 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:31,478 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 36 treesize of output 16 [2021-07-13 20:11:31,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:31,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:31,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:31,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:11:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:31,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764504532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:31,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:31,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:31,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859018701] [2021-07-13 20:11:31,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:31,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:31,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:31,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:31,610 INFO L87 Difference]: Start difference. First operand 1483 states and 3005 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:32,848 INFO L93 Difference]: Finished difference Result 1645 states and 3288 transitions. [2021-07-13 20:11:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:11:32,848 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:32,850 INFO L225 Difference]: With dead ends: 1645 [2021-07-13 20:11:32,850 INFO L226 Difference]: Without dead ends: 1597 [2021-07-13 20:11:32,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1101.0ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:11:32,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-07-13 20:11:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1484. [2021-07-13 20:11:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.0276466621712745) internal successors, (3007), 1483 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:32,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 3007 transitions. [2021-07-13 20:11:32,867 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 3007 transitions. Word has length 33 [2021-07-13 20:11:32,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:32,867 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 3007 transitions. [2021-07-13 20:11:32,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 3007 transitions. [2021-07-13 20:11:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:32,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:32,869 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:33,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:33,092 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:33,092 INFO L82 PathProgramCache]: Analyzing trace with hash 893410823, now seen corresponding path program 117 times [2021-07-13 20:11:33,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:33,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905935246] [2021-07-13 20:11:33,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:33,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:33,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905935246] [2021-07-13 20:11:33,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905935246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:33,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417823442] [2021-07-13 20:11:33,390 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 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 [2021-07-13 20:11:33,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:11:33,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:33,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:11:33,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:33,765 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:33,765 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 32 treesize of output 16 [2021-07-13 20:11:33,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:33,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:33,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:33,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:11:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:33,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417823442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:33,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:33,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:33,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138428989] [2021-07-13 20:11:33,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:33,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:33,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:33,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:33,911 INFO L87 Difference]: Start difference. First operand 1484 states and 3007 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:35,163 INFO L93 Difference]: Finished difference Result 1683 states and 3366 transitions. [2021-07-13 20:11:35,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:11:35,163 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:35,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:35,165 INFO L225 Difference]: With dead ends: 1683 [2021-07-13 20:11:35,165 INFO L226 Difference]: Without dead ends: 1635 [2021-07-13 20:11:35,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1221.1ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:11:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-07-13 20:11:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1488. [2021-07-13 20:11:35,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 2.027572293207801) internal successors, (3015), 1487 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 3015 transitions. [2021-07-13 20:11:35,179 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 3015 transitions. Word has length 33 [2021-07-13 20:11:35,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:35,179 INFO L482 AbstractCegarLoop]: Abstraction has 1488 states and 3015 transitions. [2021-07-13 20:11:35,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:35,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 3015 transitions. [2021-07-13 20:11:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:35,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:35,181 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:35,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 20:11:35,404 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:35,404 INFO L82 PathProgramCache]: Analyzing trace with hash 252300233, now seen corresponding path program 118 times [2021-07-13 20:11:35,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:35,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011822287] [2021-07-13 20:11:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:35,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011822287] [2021-07-13 20:11:35,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011822287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061115380] [2021-07-13 20:11:35,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:35,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:35,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:35,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:35,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:36,024 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:36,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:11:36,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:36,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:36,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:36,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:11:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:36,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061115380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:36,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:36,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:36,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500315364] [2021-07-13 20:11:36,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:36,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:36,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:36,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:36,213 INFO L87 Difference]: Start difference. First operand 1488 states and 3015 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:37,814 INFO L93 Difference]: Finished difference Result 1716 states and 3435 transitions. [2021-07-13 20:11:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:11:37,814 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:37,817 INFO L225 Difference]: With dead ends: 1716 [2021-07-13 20:11:37,817 INFO L226 Difference]: Without dead ends: 1684 [2021-07-13 20:11:37,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1340.9ms TimeCoverageRelationStatistics Valid=252, Invalid=2504, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:11:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-07-13 20:11:37,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1489. [2021-07-13 20:11:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 2.02755376344086) internal successors, (3017), 1488 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 3017 transitions. [2021-07-13 20:11:37,835 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 3017 transitions. Word has length 33 [2021-07-13 20:11:37,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:37,835 INFO L482 AbstractCegarLoop]: Abstraction has 1489 states and 3017 transitions. [2021-07-13 20:11:37,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:37,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 3017 transitions. [2021-07-13 20:11:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:37,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:37,837 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:38,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:38,060 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:38,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:38,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1678542599, now seen corresponding path program 119 times [2021-07-13 20:11:38,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:38,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473979456] [2021-07-13 20:11:38,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:38,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:38,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473979456] [2021-07-13 20:11:38,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473979456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:38,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715575141] [2021-07-13 20:11:38,368 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 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 [2021-07-13 20:11:38,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:11:38,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:38,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:38,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:38,684 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:38,684 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 36 treesize of output 16 [2021-07-13 20:11:38,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:38,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:38,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:38,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:11:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:38,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715575141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:38,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:38,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:38,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032354540] [2021-07-13 20:11:38,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:38,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:38,877 INFO L87 Difference]: Start difference. First operand 1489 states and 3017 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:40,667 INFO L93 Difference]: Finished difference Result 1787 states and 3573 transitions. [2021-07-13 20:11:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:11:40,667 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:40,670 INFO L225 Difference]: With dead ends: 1787 [2021-07-13 20:11:40,670 INFO L226 Difference]: Without dead ends: 1743 [2021-07-13 20:11:40,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1548.7ms TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:11:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-07-13 20:11:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1485. [2021-07-13 20:11:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 2.0256064690026956) internal successors, (3006), 1484 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 3006 transitions. [2021-07-13 20:11:40,688 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 3006 transitions. Word has length 33 [2021-07-13 20:11:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:40,688 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 3006 transitions. [2021-07-13 20:11:40,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 3006 transitions. [2021-07-13 20:11:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:40,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:40,690 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:40,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:40,905 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:40,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1040826887, now seen corresponding path program 120 times [2021-07-13 20:11:40,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:40,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083978595] [2021-07-13 20:11:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:41,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:41,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083978595] [2021-07-13 20:11:41,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083978595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:41,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354845676] [2021-07-13 20:11:41,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:41,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:11:41,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:11:41,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:41,356 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:41,356 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 32 treesize of output 16 [2021-07-13 20:11:41,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:41,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:41,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:41,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:11:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:41,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354845676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:41,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:41,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:41,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938766715] [2021-07-13 20:11:41,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:41,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:41,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:41,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:41,536 INFO L87 Difference]: Start difference. First operand 1485 states and 3006 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:42,381 INFO L93 Difference]: Finished difference Result 1606 states and 3236 transitions. [2021-07-13 20:11:42,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:11:42,382 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:42,383 INFO L225 Difference]: With dead ends: 1606 [2021-07-13 20:11:42,383 INFO L226 Difference]: Without dead ends: 1578 [2021-07-13 20:11:42,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 946.4ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:11:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-07-13 20:11:42,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1477. [2021-07-13 20:11:42,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.0257452574525745) internal successors, (2990), 1476 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2990 transitions. [2021-07-13 20:11:42,396 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2990 transitions. Word has length 33 [2021-07-13 20:11:42,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:42,396 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 2990 transitions. [2021-07-13 20:11:42,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2990 transitions. [2021-07-13 20:11:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:42,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:42,398 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:42,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 20:11:42,599 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:42,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:42,600 INFO L82 PathProgramCache]: Analyzing trace with hash -777516603, now seen corresponding path program 121 times [2021-07-13 20:11:42,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:42,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751926595] [2021-07-13 20:11:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:42,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:42,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751926595] [2021-07-13 20:11:42,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751926595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:42,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17907444] [2021-07-13 20:11:42,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:43,225 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:43,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:11:43,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:43,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:43,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:43,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:11:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:43,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17907444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:43,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:43,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:43,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165151341] [2021-07-13 20:11:43,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:43,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:43,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:43,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:43,350 INFO L87 Difference]: Start difference. First operand 1477 states and 2990 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:44,571 INFO L93 Difference]: Finished difference Result 1650 states and 3303 transitions. [2021-07-13 20:11:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:11:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:44,574 INFO L225 Difference]: With dead ends: 1650 [2021-07-13 20:11:44,574 INFO L226 Difference]: Without dead ends: 1554 [2021-07-13 20:11:44,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1253.2ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:11:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-07-13 20:11:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1494. [2021-07-13 20:11:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.026791694574682) internal successors, (3026), 1493 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3026 transitions. [2021-07-13 20:11:44,586 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3026 transitions. Word has length 33 [2021-07-13 20:11:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:44,586 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3026 transitions. [2021-07-13 20:11:44,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:44,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3026 transitions. [2021-07-13 20:11:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:44,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:44,588 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:44,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 20:11:44,790 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:44,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:44,791 INFO L82 PathProgramCache]: Analyzing trace with hash 608105987, now seen corresponding path program 122 times [2021-07-13 20:11:44,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:44,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92189560] [2021-07-13 20:11:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:45,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:45,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92189560] [2021-07-13 20:11:45,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92189560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:45,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159525713] [2021-07-13 20:11:45,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:45,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:45,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:45,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:45,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:45,509 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:45,510 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 36 treesize of output 16 [2021-07-13 20:11:45,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:45,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:45,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:45,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:11:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:45,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159525713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:45,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:45,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:45,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770753106] [2021-07-13 20:11:45,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:45,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:45,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:45,676 INFO L87 Difference]: Start difference. First operand 1494 states and 3026 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:47,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:47,891 INFO L93 Difference]: Finished difference Result 1712 states and 3436 transitions. [2021-07-13 20:11:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:11:47,892 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:47,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:47,895 INFO L225 Difference]: With dead ends: 1712 [2021-07-13 20:11:47,895 INFO L226 Difference]: Without dead ends: 1617 [2021-07-13 20:11:47,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1841.0ms TimeCoverageRelationStatistics Valid=386, Invalid=3904, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:11:47,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-07-13 20:11:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1503. [2021-07-13 20:11:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.026631158455393) internal successors, (3044), 1502 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3044 transitions. [2021-07-13 20:11:47,916 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3044 transitions. Word has length 33 [2021-07-13 20:11:47,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:47,916 INFO L482 AbstractCegarLoop]: Abstraction has 1503 states and 3044 transitions. [2021-07-13 20:11:47,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:47,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3044 transitions. [2021-07-13 20:11:47,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:47,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:47,918 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:48,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:48,142 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:48,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:48,142 INFO L82 PathProgramCache]: Analyzing trace with hash -33004603, now seen corresponding path program 123 times [2021-07-13 20:11:48,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:48,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146718244] [2021-07-13 20:11:48,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:48,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:48,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146718244] [2021-07-13 20:11:48,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146718244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:48,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86997604] [2021-07-13 20:11:48,514 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 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 [2021-07-13 20:11:48,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:11:48,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:48,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:48,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:48,782 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:48,782 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 32 treesize of output 16 [2021-07-13 20:11:48,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:48,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:48,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:48,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:11:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:49,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86997604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:49,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:49,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:49,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357155565] [2021-07-13 20:11:49,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:49,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:49,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:49,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:49,011 INFO L87 Difference]: Start difference. First operand 1503 states and 3044 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:51,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:51,345 INFO L93 Difference]: Finished difference Result 1736 states and 3481 transitions. [2021-07-13 20:11:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:11:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:51,348 INFO L225 Difference]: With dead ends: 1736 [2021-07-13 20:11:51,348 INFO L226 Difference]: Without dead ends: 1656 [2021-07-13 20:11:51,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 2133.5ms TimeCoverageRelationStatistics Valid=540, Invalid=4430, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:11:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-07-13 20:11:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1499. [2021-07-13 20:11:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0246995994659547) internal successors, (3033), 1498 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3033 transitions. [2021-07-13 20:11:51,408 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3033 transitions. Word has length 33 [2021-07-13 20:11:51,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:51,408 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 3033 transitions. [2021-07-13 20:11:51,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3033 transitions. [2021-07-13 20:11:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:51,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:51,410 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:51,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:51,632 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1393237763, now seen corresponding path program 124 times [2021-07-13 20:11:51,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:51,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265300150] [2021-07-13 20:11:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:51,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:51,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265300150] [2021-07-13 20:11:51,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265300150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:51,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449986503] [2021-07-13 20:11:51,957 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 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 [2021-07-13 20:11:51,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:11:51,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:51,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:11:52,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:52,297 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:11:52,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:11:52,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:52,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:52,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:52,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:11:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:52,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449986503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:52,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:52,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:52,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93177819] [2021-07-13 20:11:52,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:52,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:52,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:52,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:52,484 INFO L87 Difference]: Start difference. First operand 1499 states and 3033 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:55,445 INFO L93 Difference]: Finished difference Result 1806 states and 3621 transitions. [2021-07-13 20:11:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:11:55,445 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:55,448 INFO L225 Difference]: With dead ends: 1806 [2021-07-13 20:11:55,448 INFO L226 Difference]: Without dead ends: 1747 [2021-07-13 20:11:55,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 2414.1ms TimeCoverageRelationStatistics Valid=562, Invalid=4840, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:11:55,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-07-13 20:11:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1494. [2021-07-13 20:11:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-07-13 20:11:55,466 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-07-13 20:11:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:55,466 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-07-13 20:11:55,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-07-13 20:11:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:55,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:55,482 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:55,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:55,705 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash 478605017, now seen corresponding path program 125 times [2021-07-13 20:11:55,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:55,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409586445] [2021-07-13 20:11:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:56,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:56,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409586445] [2021-07-13 20:11:56,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409586445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:56,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501004482] [2021-07-13 20:11:56,065 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 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 [2021-07-13 20:11:56,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:11:56,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:56,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:11:56,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:56,359 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:56,359 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 32 treesize of output 16 [2021-07-13 20:11:56,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:56,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:56,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:56,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:11:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:56,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501004482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:56,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:56,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:56,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30118987] [2021-07-13 20:11:56,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:56,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:56,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:56,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:56,596 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:58,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:58,244 INFO L93 Difference]: Finished difference Result 1678 states and 3369 transitions. [2021-07-13 20:11:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:11:58,244 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:11:58,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:58,247 INFO L225 Difference]: With dead ends: 1678 [2021-07-13 20:11:58,247 INFO L226 Difference]: Without dead ends: 1619 [2021-07-13 20:11:58,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 1672.6ms TimeCoverageRelationStatistics Valid=416, Invalid=4006, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:11:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-07-13 20:11:58,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1494. [2021-07-13 20:11:58,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-07-13 20:11:58,266 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-07-13 20:11:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:58,266 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-07-13 20:11:58,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-07-13 20:11:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:11:58,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:58,268 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:58,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 20:11:58,477 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1104831497, now seen corresponding path program 126 times [2021-07-13 20:11:58,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:58,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403490234] [2021-07-13 20:11:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:58,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:58,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403490234] [2021-07-13 20:11:58,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403490234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:58,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177407948] [2021-07-13 20:11:58,735 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 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 [2021-07-13 20:11:58,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:11:58,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:11:58,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:59,005 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:11:59,005 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 32 treesize of output 16 [2021-07-13 20:11:59,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:11:59,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:11:59,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:11:59,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:11:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:59,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177407948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:59,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:59,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:11:59,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145204444] [2021-07-13 20:11:59,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:11:59,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:11:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:11:59,157 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:00,211 INFO L93 Difference]: Finished difference Result 1719 states and 3443 transitions. [2021-07-13 20:12:00,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:12:00,212 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:00,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:00,214 INFO L225 Difference]: With dead ends: 1719 [2021-07-13 20:12:00,214 INFO L226 Difference]: Without dead ends: 1623 [2021-07-13 20:12:00,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1164.6ms TimeCoverageRelationStatistics Valid=293, Invalid=3013, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:12:00,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-07-13 20:12:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1538. [2021-07-13 20:12:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.0286271958360445) internal successors, (3118), 1537 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3118 transitions. [2021-07-13 20:12:00,229 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3118 transitions. Word has length 33 [2021-07-13 20:12:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:00,229 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 3118 transitions. [2021-07-13 20:12:00,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3118 transitions. [2021-07-13 20:12:00,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:00,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:00,230 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:00,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:00,431 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:00,431 INFO L82 PathProgramCache]: Analyzing trace with hash 280791093, now seen corresponding path program 127 times [2021-07-13 20:12:00,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:00,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374937851] [2021-07-13 20:12:00,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:00,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:00,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374937851] [2021-07-13 20:12:00,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374937851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:00,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430188374] [2021-07-13 20:12:00,675 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 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 [2021-07-13 20:12:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:00,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:00,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:00,980 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:00,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:12:00,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:00,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:00,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:12:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:01,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430188374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:01,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:01,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:01,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631258914] [2021-07-13 20:12:01,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:01,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:01,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:01,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:01,145 INFO L87 Difference]: Start difference. First operand 1538 states and 3118 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:03,711 INFO L93 Difference]: Finished difference Result 1837 states and 3695 transitions. [2021-07-13 20:12:03,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:12:03,712 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:03,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:03,714 INFO L225 Difference]: With dead ends: 1837 [2021-07-13 20:12:03,714 INFO L226 Difference]: Without dead ends: 1735 [2021-07-13 20:12:03,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 1969.1ms TimeCoverageRelationStatistics Valid=453, Invalid=4517, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:12:03,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-07-13 20:12:03,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1580. [2021-07-13 20:12:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 2.031665611146295) internal successors, (3208), 1579 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 3208 transitions. [2021-07-13 20:12:03,731 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 3208 transitions. Word has length 33 [2021-07-13 20:12:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:03,731 INFO L482 AbstractCegarLoop]: Abstraction has 1580 states and 3208 transitions. [2021-07-13 20:12:03,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 3208 transitions. [2021-07-13 20:12:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:03,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:03,733 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:03,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:03,956 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:03,957 INFO L82 PathProgramCache]: Analyzing trace with hash -360319497, now seen corresponding path program 128 times [2021-07-13 20:12:03,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:03,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516944607] [2021-07-13 20:12:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:04,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:04,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516944607] [2021-07-13 20:12:04,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516944607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:04,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459286660] [2021-07-13 20:12:04,276 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 [2021-07-13 20:12:04,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:04,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:04,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:04,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:04,588 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:04,588 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 36 treesize of output 16 [2021-07-13 20:12:04,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:04,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:04,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:04,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:12:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:04,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459286660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:04,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:04,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:04,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978916833] [2021-07-13 20:12:04,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:04,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:04,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:04,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:04,775 INFO L87 Difference]: Start difference. First operand 1580 states and 3208 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:07,959 INFO L93 Difference]: Finished difference Result 1994 states and 4027 transitions. [2021-07-13 20:12:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:12:07,959 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:07,962 INFO L225 Difference]: With dead ends: 1994 [2021-07-13 20:12:07,962 INFO L226 Difference]: Without dead ends: 1895 [2021-07-13 20:12:07,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2533 ImplicationChecksByTransitivity, 2710.7ms TimeCoverageRelationStatistics Valid=766, Invalid=7066, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:12:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-07-13 20:12:07,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1605. [2021-07-13 20:12:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 2.0311720698254363) internal successors, (3258), 1604 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 3258 transitions. [2021-07-13 20:12:07,981 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 3258 transitions. Word has length 33 [2021-07-13 20:12:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:07,981 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 3258 transitions. [2021-07-13 20:12:07,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 3258 transitions. [2021-07-13 20:12:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:07,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:07,984 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:08,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-13 20:12:08,207 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:08,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:08,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1065922869, now seen corresponding path program 129 times [2021-07-13 20:12:08,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:08,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923641093] [2021-07-13 20:12:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:08,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:08,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923641093] [2021-07-13 20:12:08,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923641093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:08,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436821557] [2021-07-13 20:12:08,525 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 [2021-07-13 20:12:08,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:12:08,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:08,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:08,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:08,818 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:08,818 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 32 treesize of output 16 [2021-07-13 20:12:08,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:08,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:08,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:08,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:12:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:08,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436821557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:08,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:08,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:08,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070107320] [2021-07-13 20:12:08,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:08,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:08,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:08,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:08,996 INFO L87 Difference]: Start difference. First operand 1605 states and 3258 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:12,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:12,625 INFO L93 Difference]: Finished difference Result 2110 states and 4259 transitions. [2021-07-13 20:12:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:12:12,625 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:12,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:12,629 INFO L225 Difference]: With dead ends: 2110 [2021-07-13 20:12:12,629 INFO L226 Difference]: Without dead ends: 2048 [2021-07-13 20:12:12,630 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 2930.3ms TimeCoverageRelationStatistics Valid=807, Invalid=7749, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:12:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-07-13 20:12:12,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1696. [2021-07-13 20:12:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.033628318584071) internal successors, (3447), 1695 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 3447 transitions. [2021-07-13 20:12:12,651 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 3447 transitions. Word has length 33 [2021-07-13 20:12:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:12,651 INFO L482 AbstractCegarLoop]: Abstraction has 1696 states and 3447 transitions. [2021-07-13 20:12:12,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 3447 transitions. [2021-07-13 20:12:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:12,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:12,653 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:12,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:12,877 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:12,877 INFO L82 PathProgramCache]: Analyzing trace with hash 151290123, now seen corresponding path program 130 times [2021-07-13 20:12:12,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:12,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982417714] [2021-07-13 20:12:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:13,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:13,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982417714] [2021-07-13 20:12:13,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982417714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:13,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866445146] [2021-07-13 20:12:13,212 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 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 [2021-07-13 20:12:13,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:13,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:13,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:13,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:13,498 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:13,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:12:13,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:13,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:13,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:13,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:12:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:13,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866445146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:13,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:13,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:13,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667427074] [2021-07-13 20:12:13,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:13,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:13,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:13,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:13,740 INFO L87 Difference]: Start difference. First operand 1696 states and 3447 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:15,877 INFO L93 Difference]: Finished difference Result 1992 states and 4011 transitions. [2021-07-13 20:12:15,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:12:15,877 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:15,880 INFO L225 Difference]: With dead ends: 1992 [2021-07-13 20:12:15,880 INFO L226 Difference]: Without dead ends: 1936 [2021-07-13 20:12:15,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1965.6ms TimeCoverageRelationStatistics Valid=417, Invalid=3873, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:12:15,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-07-13 20:12:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1752. [2021-07-13 20:12:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.031410622501428) internal successors, (3557), 1751 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3557 transitions. [2021-07-13 20:12:15,925 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3557 transitions. Word has length 33 [2021-07-13 20:12:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:15,925 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 3557 transitions. [2021-07-13 20:12:15,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3557 transitions. [2021-07-13 20:12:15,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:15,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:15,943 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:16,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:16,165 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash 154706401, now seen corresponding path program 131 times [2021-07-13 20:12:16,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:16,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844649506] [2021-07-13 20:12:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:16,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:16,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844649506] [2021-07-13 20:12:16,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844649506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:16,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005752923] [2021-07-13 20:12:16,512 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 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 [2021-07-13 20:12:16,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:12:16,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:16,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:12:16,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:16,857 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:16,857 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 32 treesize of output 16 [2021-07-13 20:12:16,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:16,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:16,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:16,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:12:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:16,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005752923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:16,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:16,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:16,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777808999] [2021-07-13 20:12:16,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:16,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:16,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:16,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:16,994 INFO L87 Difference]: Start difference. First operand 1752 states and 3557 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:19,885 INFO L93 Difference]: Finished difference Result 2256 states and 4557 transitions. [2021-07-13 20:12:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:12:19,885 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:19,888 INFO L225 Difference]: With dead ends: 2256 [2021-07-13 20:12:19,888 INFO L226 Difference]: Without dead ends: 2168 [2021-07-13 20:12:19,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 2493.3ms TimeCoverageRelationStatistics Valid=531, Invalid=5631, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:12:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-07-13 20:12:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1988. [2021-07-13 20:12:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.030699547055863) internal successors, (4035), 1987 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 4035 transitions. [2021-07-13 20:12:19,912 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 4035 transitions. Word has length 33 [2021-07-13 20:12:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:19,912 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 4035 transitions. [2021-07-13 20:12:19,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:19,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 4035 transitions. [2021-07-13 20:12:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:19,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:19,915 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:20,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 20:12:20,138 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:20,138 INFO L82 PathProgramCache]: Analyzing trace with hash -486404189, now seen corresponding path program 132 times [2021-07-13 20:12:20,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:20,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240778252] [2021-07-13 20:12:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:20,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:20,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240778252] [2021-07-13 20:12:20,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240778252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:20,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473906286] [2021-07-13 20:12:20,532 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 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 [2021-07-13 20:12:20,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:12:20,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:20,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:12:20,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:20,844 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:20,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:12:20,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:20,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:20,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:20,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:12:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:21,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473906286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:21,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:21,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:21,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353181214] [2021-07-13 20:12:21,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:21,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:21,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:21,042 INFO L87 Difference]: Start difference. First operand 1988 states and 4035 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:24,351 INFO L93 Difference]: Finished difference Result 2485 states and 5053 transitions. [2021-07-13 20:12:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:12:24,351 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:24,355 INFO L225 Difference]: With dead ends: 2485 [2021-07-13 20:12:24,355 INFO L226 Difference]: Without dead ends: 2405 [2021-07-13 20:12:24,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 2891.0ms TimeCoverageRelationStatistics Valid=672, Invalid=6984, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:12:24,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-07-13 20:12:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1662. [2021-07-13 20:12:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.033112582781457) internal successors, (3377), 1661 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3377 transitions. [2021-07-13 20:12:24,378 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3377 transitions. Word has length 33 [2021-07-13 20:12:24,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:24,378 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 3377 transitions. [2021-07-13 20:12:24,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3377 transitions. [2021-07-13 20:12:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:24,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:24,380 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:24,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 20:12:24,589 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:24,589 INFO L82 PathProgramCache]: Analyzing trace with hash 939838177, now seen corresponding path program 133 times [2021-07-13 20:12:24,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:24,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000117586] [2021-07-13 20:12:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:24,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:24,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000117586] [2021-07-13 20:12:24,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000117586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:24,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404604663] [2021-07-13 20:12:24,941 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 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 [2021-07-13 20:12:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:24,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:24,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:25,244 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:25,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:12:25,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:25,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:25,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:25,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:12:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:25,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404604663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:25,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:25,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:25,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324845250] [2021-07-13 20:12:25,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:25,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:25,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:25,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:25,397 INFO L87 Difference]: Start difference. First operand 1662 states and 3377 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:28,898 INFO L93 Difference]: Finished difference Result 2226 states and 4483 transitions. [2021-07-13 20:12:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:12:28,898 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:28,901 INFO L225 Difference]: With dead ends: 2226 [2021-07-13 20:12:28,901 INFO L226 Difference]: Without dead ends: 2170 [2021-07-13 20:12:28,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 2899.4ms TimeCoverageRelationStatistics Valid=763, Invalid=7793, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:12:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-07-13 20:12:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1536. [2021-07-13 20:12:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.0273615635179154) internal successors, (3112), 1535 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3112 transitions. [2021-07-13 20:12:28,922 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3112 transitions. Word has length 33 [2021-07-13 20:12:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:28,922 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3112 transitions. [2021-07-13 20:12:28,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3112 transitions. [2021-07-13 20:12:28,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:28,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:28,923 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:29,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-07-13 20:12:29,141 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:29,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:29,141 INFO L82 PathProgramCache]: Analyzing trace with hash 834991559, now seen corresponding path program 134 times [2021-07-13 20:12:29,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:29,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346446215] [2021-07-13 20:12:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:29,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:29,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346446215] [2021-07-13 20:12:29,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346446215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:29,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293142446] [2021-07-13 20:12:29,543 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 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 [2021-07-13 20:12:29,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:29,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:29,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:29,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:29,864 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:29,864 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 36 treesize of output 16 [2021-07-13 20:12:29,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:29,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:29,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:29,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:12:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:30,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293142446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:30,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:30,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:30,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734805770] [2021-07-13 20:12:30,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:30,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:30,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:30,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:30,041 INFO L87 Difference]: Start difference. First operand 1536 states and 3112 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:31,681 INFO L93 Difference]: Finished difference Result 2035 states and 4093 transitions. [2021-07-13 20:12:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:12:31,682 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:31,684 INFO L225 Difference]: With dead ends: 2035 [2021-07-13 20:12:31,684 INFO L226 Difference]: Without dead ends: 1979 [2021-07-13 20:12:31,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 1758.5ms TimeCoverageRelationStatistics Valid=466, Invalid=4226, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:12:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-07-13 20:12:31,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1471. [2021-07-13 20:12:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.0258503401360546) internal successors, (2978), 1470 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2978 transitions. [2021-07-13 20:12:31,698 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2978 transitions. Word has length 33 [2021-07-13 20:12:31,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:31,698 INFO L482 AbstractCegarLoop]: Abstraction has 1471 states and 2978 transitions. [2021-07-13 20:12:31,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:31,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2978 transitions. [2021-07-13 20:12:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:31,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:31,699 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:31,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:31,900 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:31,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2101647219, now seen corresponding path program 135 times [2021-07-13 20:12:31,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:31,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388008760] [2021-07-13 20:12:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:32,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:32,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388008760] [2021-07-13 20:12:32,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388008760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:32,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969106884] [2021-07-13 20:12:32,151 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 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 [2021-07-13 20:12:32,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:12:32,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:32,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:32,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:32,431 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:32,431 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 32 treesize of output 16 [2021-07-13 20:12:32,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:32,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:32,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:32,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:12:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:32,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969106884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:32,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:32,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:32,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176448462] [2021-07-13 20:12:32,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:32,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:32,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:32,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:32,550 INFO L87 Difference]: Start difference. First operand 1471 states and 2978 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:33,772 INFO L93 Difference]: Finished difference Result 1668 states and 3337 transitions. [2021-07-13 20:12:33,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:12:33,772 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:33,774 INFO L225 Difference]: With dead ends: 1668 [2021-07-13 20:12:33,774 INFO L226 Difference]: Without dead ends: 1572 [2021-07-13 20:12:33,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1112.3ms TimeCoverageRelationStatistics Valid=296, Invalid=2896, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:12:33,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-07-13 20:12:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1496. [2021-07-13 20:12:33,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:33,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-07-13 20:12:33,786 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-07-13 20:12:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:33,786 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-07-13 20:12:33,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-07-13 20:12:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:33,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:33,788 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:33,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:33,988 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:33,989 INFO L82 PathProgramCache]: Analyzing trace with hash -716024629, now seen corresponding path program 136 times [2021-07-13 20:12:33,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:33,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803470642] [2021-07-13 20:12:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:34,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:34,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803470642] [2021-07-13 20:12:34,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803470642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:34,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609886708] [2021-07-13 20:12:34,259 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 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 [2021-07-13 20:12:34,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:34,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:34,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:34,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:34,532 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:34,532 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 36 treesize of output 16 [2021-07-13 20:12:34,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:34,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:34,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:34,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:12:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:34,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609886708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:34,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:34,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:34,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461923452] [2021-07-13 20:12:34,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:34,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:34,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:34,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:34,658 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:35,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:35,844 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-07-13 20:12:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:12:35,845 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:35,847 INFO L225 Difference]: With dead ends: 1683 [2021-07-13 20:12:35,847 INFO L226 Difference]: Without dead ends: 1595 [2021-07-13 20:12:35,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1147.9ms TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:12:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-07-13 20:12:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1499. [2021-07-13 20:12:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0253671562082776) internal successors, (3034), 1498 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3034 transitions. [2021-07-13 20:12:35,859 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3034 transitions. Word has length 33 [2021-07-13 20:12:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:35,859 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 3034 transitions. [2021-07-13 20:12:35,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3034 transitions. [2021-07-13 20:12:35,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:35,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:35,860 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:36,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:36,061 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:36,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1357135219, now seen corresponding path program 137 times [2021-07-13 20:12:36,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:36,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002762468] [2021-07-13 20:12:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:36,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:36,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002762468] [2021-07-13 20:12:36,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002762468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:36,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924009554] [2021-07-13 20:12:36,317 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 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 [2021-07-13 20:12:36,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:12:36,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:36,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:36,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:36,548 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:36,548 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 36 treesize of output 16 [2021-07-13 20:12:36,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:36,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:36,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:36,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:12:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:36,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924009554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:36,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:36,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:36,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398553168] [2021-07-13 20:12:36,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:36,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:36,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:36,692 INFO L87 Difference]: Start difference. First operand 1499 states and 3034 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:38,547 INFO L93 Difference]: Finished difference Result 1771 states and 3554 transitions. [2021-07-13 20:12:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:12:38,547 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:38,549 INFO L225 Difference]: With dead ends: 1771 [2021-07-13 20:12:38,549 INFO L226 Difference]: Without dead ends: 1675 [2021-07-13 20:12:38,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1670.8ms TimeCoverageRelationStatistics Valid=507, Invalid=4605, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:12:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-07-13 20:12:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1504. [2021-07-13 20:12:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 2.0246174318030605) internal successors, (3043), 1503 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 3043 transitions. [2021-07-13 20:12:38,562 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 3043 transitions. Word has length 33 [2021-07-13 20:12:38,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:38,562 INFO L482 AbstractCegarLoop]: Abstraction has 1504 states and 3043 transitions. [2021-07-13 20:12:38,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:38,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 3043 transitions. [2021-07-13 20:12:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:38,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:38,564 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:38,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-13 20:12:38,764 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:38,765 INFO L82 PathProgramCache]: Analyzing trace with hash 69107147, now seen corresponding path program 138 times [2021-07-13 20:12:38,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:38,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392347958] [2021-07-13 20:12:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:39,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:39,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392347958] [2021-07-13 20:12:39,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392347958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:39,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816537633] [2021-07-13 20:12:39,114 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 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 [2021-07-13 20:12:39,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:12:39,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:39,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:12:39,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:39,412 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:39,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-07-13 20:12:39,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:39,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:39,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:39,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:12:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:39,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816537633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:39,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:39,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:39,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078573621] [2021-07-13 20:12:39,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:39,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:39,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:39,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:39,627 INFO L87 Difference]: Start difference. First operand 1504 states and 3043 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:42,233 INFO L93 Difference]: Finished difference Result 1940 states and 3886 transitions. [2021-07-13 20:12:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:12:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:42,236 INFO L225 Difference]: With dead ends: 1940 [2021-07-13 20:12:42,236 INFO L226 Difference]: Without dead ends: 1862 [2021-07-13 20:12:42,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 2390.0ms TimeCoverageRelationStatistics Valid=695, Invalid=6445, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:12:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-07-13 20:12:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1495. [2021-07-13 20:12:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0234270414993305) internal successors, (3023), 1494 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3023 transitions. [2021-07-13 20:12:42,251 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3023 transitions. Word has length 33 [2021-07-13 20:12:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:42,251 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 3023 transitions. [2021-07-13 20:12:42,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3023 transitions. [2021-07-13 20:12:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:42,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:42,252 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:42,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-07-13 20:12:42,453 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:42,453 INFO L82 PathProgramCache]: Analyzing trace with hash -845525599, now seen corresponding path program 139 times [2021-07-13 20:12:42,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:42,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349560066] [2021-07-13 20:12:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:42,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:42,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349560066] [2021-07-13 20:12:42,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349560066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:42,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805950192] [2021-07-13 20:12:42,808 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 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 [2021-07-13 20:12:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:42,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:43,095 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:43,096 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 36 treesize of output 16 [2021-07-13 20:12:43,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:43,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:43,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:43,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:12:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:43,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805950192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:43,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:43,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-07-13 20:12:43,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981104235] [2021-07-13 20:12:43,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:12:43,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:43,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:12:43,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:12:43,331 INFO L87 Difference]: Start difference. First operand 1495 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:45,455 INFO L93 Difference]: Finished difference Result 1704 states and 3411 transitions. [2021-07-13 20:12:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:12:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:45,458 INFO L225 Difference]: With dead ends: 1704 [2021-07-13 20:12:45,458 INFO L226 Difference]: Without dead ends: 1642 [2021-07-13 20:12:45,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2034.4ms TimeCoverageRelationStatistics Valid=515, Invalid=4741, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:12:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-07-13 20:12:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1472. [2021-07-13 20:12:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.025832766825289) internal successors, (2980), 1471 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2980 transitions. [2021-07-13 20:12:45,474 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2980 transitions. Word has length 33 [2021-07-13 20:12:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:45,474 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 2980 transitions. [2021-07-13 20:12:45,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:45,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2980 transitions. [2021-07-13 20:12:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:45,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:45,476 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:45,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:45,698 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:45,699 INFO L82 PathProgramCache]: Analyzing trace with hash -349346937, now seen corresponding path program 140 times [2021-07-13 20:12:45,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:45,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846027434] [2021-07-13 20:12:45,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:46,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:46,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846027434] [2021-07-13 20:12:46,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846027434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:46,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138812858] [2021-07-13 20:12:46,028 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 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 [2021-07-13 20:12:46,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:46,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:46,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:46,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:46,369 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:12:46,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-07-13 20:12:46,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:46,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:46,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:46,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-07-13 20:12:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:46,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138812858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:46,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:46,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-13 20:12:46,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633111204] [2021-07-13 20:12:46,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:12:46,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:46,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:12:46,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:12:46,510 INFO L87 Difference]: Start difference. First operand 1472 states and 2980 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:48,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:48,197 INFO L93 Difference]: Finished difference Result 1656 states and 3314 transitions. [2021-07-13 20:12:48,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:12:48,197 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:48,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:48,199 INFO L225 Difference]: With dead ends: 1656 [2021-07-13 20:12:48,199 INFO L226 Difference]: Without dead ends: 1568 [2021-07-13 20:12:48,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1650.3ms TimeCoverageRelationStatistics Valid=332, Invalid=3208, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:12:48,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-07-13 20:12:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1494. [2021-07-13 20:12:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.024112525117214) internal successors, (3022), 1493 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3022 transitions. [2021-07-13 20:12:48,215 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3022 transitions. Word has length 33 [2021-07-13 20:12:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:48,216 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 3022 transitions. [2021-07-13 20:12:48,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3022 transitions. [2021-07-13 20:12:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:48,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:48,218 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:48,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2021-07-13 20:12:48,441 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash -990457527, now seen corresponding path program 141 times [2021-07-13 20:12:48,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:48,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421278142] [2021-07-13 20:12:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:48,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:48,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421278142] [2021-07-13 20:12:48,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421278142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:48,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402284965] [2021-07-13 20:12:48,842 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 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 [2021-07-13 20:12:48,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:12:48,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:48,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:48,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:49,150 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:49,150 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 32 treesize of output 16 [2021-07-13 20:12:49,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:49,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:49,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:49,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:12:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:49,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402284965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:49,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:49,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-13 20:12:49,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904713184] [2021-07-13 20:12:49,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:12:49,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:49,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:12:49,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:12:49,335 INFO L87 Difference]: Start difference. First operand 1494 states and 3022 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:51,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:51,228 INFO L93 Difference]: Finished difference Result 1676 states and 3358 transitions. [2021-07-13 20:12:51,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:12:51,228 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:51,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:51,231 INFO L225 Difference]: With dead ends: 1676 [2021-07-13 20:12:51,231 INFO L226 Difference]: Without dead ends: 1604 [2021-07-13 20:12:51,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 1867.6ms TimeCoverageRelationStatistics Valid=426, Invalid=3864, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:12:51,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-07-13 20:12:51,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1495. [2021-07-13 20:12:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0240963855421685) internal successors, (3024), 1494 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3024 transitions. [2021-07-13 20:12:51,248 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3024 transitions. Word has length 33 [2021-07-13 20:12:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:51,248 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 3024 transitions. [2021-07-13 20:12:51,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3024 transitions. [2021-07-13 20:12:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 20:12:51,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:51,250 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:51,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:51,473 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:51,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:51,473 INFO L82 PathProgramCache]: Analyzing trace with hash 435784839, now seen corresponding path program 142 times [2021-07-13 20:12:51,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:51,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650796524] [2021-07-13 20:12:51,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:51,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:51,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650796524] [2021-07-13 20:12:51,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650796524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:51,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894814285] [2021-07-13 20:12:51,809 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 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 [2021-07-13 20:12:51,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:12:51,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:51,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:12:51,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:52,116 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:12:52,116 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 32 treesize of output 16 [2021-07-13 20:12:52,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:52,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:52,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:52,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-07-13 20:12:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:52,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894814285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:52,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:52,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-07-13 20:12:52,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556896191] [2021-07-13 20:12:52,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:12:52,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:52,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:12:52,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:12:52,313 INFO L87 Difference]: Start difference. First operand 1495 states and 3024 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:54,748 INFO L93 Difference]: Finished difference Result 1714 states and 3440 transitions. [2021-07-13 20:12:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:12:54,748 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 20:12:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:54,751 INFO L225 Difference]: With dead ends: 1714 [2021-07-13 20:12:54,751 INFO L226 Difference]: Without dead ends: 1652 [2021-07-13 20:12:54,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 2208.6ms TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:12:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-07-13 20:12:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1462. [2021-07-13 20:12:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 2.027378507871321) internal successors, (2962), 1461 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2962 transitions. [2021-07-13 20:12:54,765 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2962 transitions. Word has length 33 [2021-07-13 20:12:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:54,765 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 2962 transitions. [2021-07-13 20:12:54,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2962 transitions. [2021-07-13 20:12:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 20:12:54,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:54,766 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:54,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-13 20:12:54,967 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:54,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1387234304, now seen corresponding path program 143 times [2021-07-13 20:12:54,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:54,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295626417] [2021-07-13 20:12:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:55,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:55,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295626417] [2021-07-13 20:12:55,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295626417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:55,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067186947] [2021-07-13 20:12:55,120 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 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 [2021-07-13 20:12:55,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:12:55,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:55,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:12:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:55,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:12:55,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:55,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:55,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:55,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:12:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:55,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067186947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:55,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:55,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 20:12:55,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275588292] [2021-07-13 20:12:55,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:12:55,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:55,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:12:55,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:12:55,218 INFO L87 Difference]: Start difference. First operand 1462 states and 2962 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-07-13 20:12:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:55,571 INFO L93 Difference]: Finished difference Result 1735 states and 3460 transitions. [2021-07-13 20:12:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:12:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 36 [2021-07-13 20:12:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:55,574 INFO L225 Difference]: With dead ends: 1735 [2021-07-13 20:12:55,574 INFO L226 Difference]: Without dead ends: 1735 [2021-07-13 20:12:55,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:12:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-07-13 20:12:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1322. [2021-07-13 20:12:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 2.0098410295230886) internal successors, (2655), 1321 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:55,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2655 transitions. [2021-07-13 20:12:55,589 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2655 transitions. Word has length 36 [2021-07-13 20:12:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:55,589 INFO L482 AbstractCegarLoop]: Abstraction has 1322 states and 2655 transitions. [2021-07-13 20:12:55,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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) [2021-07-13 20:12:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2655 transitions. [2021-07-13 20:12:55,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:12:55,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:55,591 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:55,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:55,815 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:55,816 INFO L82 PathProgramCache]: Analyzing trace with hash 783776818, now seen corresponding path program 144 times [2021-07-13 20:12:55,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:55,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168923442] [2021-07-13 20:12:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:55,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:55,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168923442] [2021-07-13 20:12:55,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168923442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:55,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455418648] [2021-07-13 20:12:55,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:55,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:12:55,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:55,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:12:55,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:55,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455418648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:55,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:55,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 20:12:55,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865741991] [2021-07-13 20:12:55,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:12:55,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:55,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:12:55,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:12:55,926 INFO L87 Difference]: Start difference. First operand 1322 states and 2655 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:55,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:55,949 INFO L93 Difference]: Finished difference Result 1768 states and 3530 transitions. [2021-07-13 20:12:55,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:12:55,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:12:55,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:55,952 INFO L225 Difference]: With dead ends: 1768 [2021-07-13 20:12:55,952 INFO L226 Difference]: Without dead ends: 1713 [2021-07-13 20:12:55,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:12:55,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-07-13 20:12:55,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1600. [2021-07-13 20:12:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.038148843026892) internal successors, (3259), 1599 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:55,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3259 transitions. [2021-07-13 20:12:55,971 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3259 transitions. Word has length 37 [2021-07-13 20:12:55,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:55,971 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 3259 transitions. [2021-07-13 20:12:55,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3259 transitions. [2021-07-13 20:12:55,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:12:55,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:55,973 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:56,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:56,196 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:56,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:56,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2072843805, now seen corresponding path program 145 times [2021-07-13 20:12:56,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:56,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605518723] [2021-07-13 20:12:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:56,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605518723] [2021-07-13 20:12:56,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605518723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:56,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148758736] [2021-07-13 20:12:56,692 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 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 [2021-07-13 20:12:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:56,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:12:56,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:57,094 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:12:57,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-07-13 20:12:57,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:12:57,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:12:57,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:12:57,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-07-13 20:12:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:57,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148758736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:57,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:57,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 33 [2021-07-13 20:12:57,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066292153] [2021-07-13 20:12:57,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:12:57,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:57,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:12:57,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:12:57,295 INFO L87 Difference]: Start difference. First operand 1600 states and 3259 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:59,026 INFO L93 Difference]: Finished difference Result 1794 states and 3597 transitions. [2021-07-13 20:12:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:12:59,026 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:12:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:59,029 INFO L225 Difference]: With dead ends: 1794 [2021-07-13 20:12:59,029 INFO L226 Difference]: Without dead ends: 1730 [2021-07-13 20:12:59,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1588.2ms TimeCoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:12:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-07-13 20:12:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1617. [2021-07-13 20:12:59,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 2.0340346534653464) internal successors, (3287), 1616 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 3287 transitions. [2021-07-13 20:12:59,048 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 3287 transitions. Word has length 40 [2021-07-13 20:12:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:59,048 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 3287 transitions. [2021-07-13 20:12:59,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 3287 transitions. [2021-07-13 20:12:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:12:59,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:59,050 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:59,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-13 20:12:59,257 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:59,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1011750747, now seen corresponding path program 146 times [2021-07-13 20:12:59,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:59,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269142024] [2021-07-13 20:12:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:59,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:59,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269142024] [2021-07-13 20:12:59,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269142024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:59,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915415447] [2021-07-13 20:12:59,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:59,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:12:59,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:59,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:12:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:00,339 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:13:00,339 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 42 treesize of output 18 [2021-07-13 20:13:00,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:00,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:00,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:00,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-07-13 20:13:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:00,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915415447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:00,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:00,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-13 20:13:00,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315062752] [2021-07-13 20:13:00,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:13:00,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:00,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:13:00,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:13:00,519 INFO L87 Difference]: Start difference. First operand 1617 states and 3287 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:02,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:02,465 INFO L93 Difference]: Finished difference Result 1818 states and 3644 transitions. [2021-07-13 20:13:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:13:02,465 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:02,468 INFO L225 Difference]: With dead ends: 1818 [2021-07-13 20:13:02,468 INFO L226 Difference]: Without dead ends: 1754 [2021-07-13 20:13:02,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1846.3ms TimeCoverageRelationStatistics Valid=244, Invalid=3062, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:13:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-07-13 20:13:02,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1623. [2021-07-13 20:13:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 2.0357583230579532) internal successors, (3302), 1622 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:02,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 3302 transitions. [2021-07-13 20:13:02,489 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 3302 transitions. Word has length 40 [2021-07-13 20:13:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:02,489 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 3302 transitions. [2021-07-13 20:13:02,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 3302 transitions. [2021-07-13 20:13:02,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:02,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:02,491 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:02,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:02,713 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:02,713 INFO L82 PathProgramCache]: Analyzing trace with hash -666824675, now seen corresponding path program 147 times [2021-07-13 20:13:02,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:02,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316499475] [2021-07-13 20:13:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:03,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:03,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316499475] [2021-07-13 20:13:03,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316499475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:03,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503296914] [2021-07-13 20:13:03,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:03,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:13:03,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:03,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:03,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:03,720 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:13:03,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:13:03,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:03,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:03,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:03,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-07-13 20:13:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:03,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503296914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:03,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:03,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-13 20:13:03,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146737307] [2021-07-13 20:13:03,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:13:03,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:13:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:13:03,904 INFO L87 Difference]: Start difference. First operand 1623 states and 3302 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:05,906 INFO L93 Difference]: Finished difference Result 1843 states and 3691 transitions. [2021-07-13 20:13:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:13:05,906 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:05,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:05,909 INFO L225 Difference]: With dead ends: 1843 [2021-07-13 20:13:05,909 INFO L226 Difference]: Without dead ends: 1779 [2021-07-13 20:13:05,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1816.1ms TimeCoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:13:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2021-07-13 20:13:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1624. [2021-07-13 20:13:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.0357362908194703) internal successors, (3304), 1623 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 3304 transitions. [2021-07-13 20:13:05,928 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 3304 transitions. Word has length 40 [2021-07-13 20:13:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:05,928 INFO L482 AbstractCegarLoop]: Abstraction has 1624 states and 3304 transitions. [2021-07-13 20:13:05,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 3304 transitions. [2021-07-13 20:13:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:05,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:05,930 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:06,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:06,131 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:06,131 INFO L82 PathProgramCache]: Analyzing trace with hash -252990117, now seen corresponding path program 148 times [2021-07-13 20:13:06,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:06,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563230721] [2021-07-13 20:13:06,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:06,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:06,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563230721] [2021-07-13 20:13:06,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563230721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:06,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001064768] [2021-07-13 20:13:06,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:06,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:06,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:06,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:06,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:07,015 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:13:07,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-07-13 20:13:07,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:07,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:07,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:07,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-07-13 20:13:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:07,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001064768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:07,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:07,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-13 20:13:07,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955166595] [2021-07-13 20:13:07,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:13:07,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:07,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:13:07,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:13:07,161 INFO L87 Difference]: Start difference. First operand 1624 states and 3304 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:08,905 INFO L93 Difference]: Finished difference Result 1881 states and 3769 transitions. [2021-07-13 20:13:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:13:08,906 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:08,908 INFO L225 Difference]: With dead ends: 1881 [2021-07-13 20:13:08,908 INFO L226 Difference]: Without dead ends: 1817 [2021-07-13 20:13:08,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1607.9ms TimeCoverageRelationStatistics Valid=254, Invalid=3286, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:13:08,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-07-13 20:13:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1628. [2021-07-13 20:13:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 2.0356484326982174) internal successors, (3312), 1627 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 3312 transitions. [2021-07-13 20:13:08,921 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 3312 transitions. Word has length 40 [2021-07-13 20:13:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:08,921 INFO L482 AbstractCegarLoop]: Abstraction has 1628 states and 3312 transitions. [2021-07-13 20:13:08,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 3312 transitions. [2021-07-13 20:13:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:08,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:08,923 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:09,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:09,140 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:09,140 INFO L82 PathProgramCache]: Analyzing trace with hash -924554723, now seen corresponding path program 149 times [2021-07-13 20:13:09,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:09,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016509094] [2021-07-13 20:13:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:09,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:09,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016509094] [2021-07-13 20:13:09,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016509094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:09,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115114799] [2021-07-13 20:13:09,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:09,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:13:09,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:13:09,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:09,956 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:13:09,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:13:09,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:09,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:09,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:09,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-07-13 20:13:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:10,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115114799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:10,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:10,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-13 20:13:10,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361012389] [2021-07-13 20:13:10,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:13:10,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:10,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:13:10,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:13:10,092 INFO L87 Difference]: Start difference. First operand 1628 states and 3312 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:12,233 INFO L93 Difference]: Finished difference Result 1922 states and 3854 transitions. [2021-07-13 20:13:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:13:12,233 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:12,235 INFO L225 Difference]: With dead ends: 1922 [2021-07-13 20:13:12,236 INFO L226 Difference]: Without dead ends: 1874 [2021-07-13 20:13:12,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1775.3ms TimeCoverageRelationStatistics Valid=322, Invalid=4100, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:13:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-07-13 20:13:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1629. [2021-07-13 20:13:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 2.0356265356265357) internal successors, (3314), 1628 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 3314 transitions. [2021-07-13 20:13:12,250 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 3314 transitions. Word has length 40 [2021-07-13 20:13:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:12,250 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 3314 transitions. [2021-07-13 20:13:12,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 3314 transitions. [2021-07-13 20:13:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:12,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:12,251 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:12,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:12,452 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:12,452 INFO L82 PathProgramCache]: Analyzing trace with hash 461067867, now seen corresponding path program 150 times [2021-07-13 20:13:12,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:12,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40659601] [2021-07-13 20:13:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:12,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:12,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40659601] [2021-07-13 20:13:12,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40659601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:12,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56692716] [2021-07-13 20:13:12,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:12,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:13:12,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:12,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:13:12,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:13,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:13,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:13:13,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:13,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:13,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:13,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:13:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:13,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56692716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:13,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:13,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2021-07-13 20:13:13,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822156957] [2021-07-13 20:13:13,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:13:13,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:13,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:13:13,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:13:13,663 INFO L87 Difference]: Start difference. First operand 1629 states and 3314 transitions. Second operand has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:16,932 INFO L93 Difference]: Finished difference Result 2008 states and 4033 transitions. [2021-07-13 20:13:16,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:13:16,933 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:16,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:16,935 INFO L225 Difference]: With dead ends: 2008 [2021-07-13 20:13:16,935 INFO L226 Difference]: Without dead ends: 1964 [2021-07-13 20:13:16,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 2882.7ms TimeCoverageRelationStatistics Valid=564, Invalid=7446, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:13:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-07-13 20:13:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1644. [2021-07-13 20:13:16,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 2.037127206329884) internal successors, (3347), 1643 states have internal predecessors, (3347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:16,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 3347 transitions. [2021-07-13 20:13:16,949 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 3347 transitions. Word has length 40 [2021-07-13 20:13:16,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:16,949 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 3347 transitions. [2021-07-13 20:13:16,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 3347 transitions. [2021-07-13 20:13:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:16,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:16,951 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:17,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:17,152 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:17,152 INFO L82 PathProgramCache]: Analyzing trace with hash -180042723, now seen corresponding path program 151 times [2021-07-13 20:13:17,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:17,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202286057] [2021-07-13 20:13:17,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:17,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:17,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202286057] [2021-07-13 20:13:17,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202286057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:17,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246982839] [2021-07-13 20:13:17,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:13:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:17,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:17,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:17,842 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 20:13:17,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:13:17,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:17,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:17,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:17,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-07-13 20:13:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:18,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246982839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:18,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:18,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-13 20:13:18,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240397105] [2021-07-13 20:13:18,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:13:18,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:18,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:13:18,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:13:18,012 INFO L87 Difference]: Start difference. First operand 1644 states and 3347 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:20,453 INFO L93 Difference]: Finished difference Result 2043 states and 4097 transitions. [2021-07-13 20:13:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:13:20,454 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:20,456 INFO L225 Difference]: With dead ends: 2043 [2021-07-13 20:13:20,456 INFO L226 Difference]: Without dead ends: 1986 [2021-07-13 20:13:20,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1913.6ms TimeCoverageRelationStatistics Valid=384, Invalid=4872, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:13:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-07-13 20:13:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1637. [2021-07-13 20:13:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 2.0354523227383865) internal successors, (3330), 1636 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 3330 transitions. [2021-07-13 20:13:20,472 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 3330 transitions. Word has length 40 [2021-07-13 20:13:20,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:20,472 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 3330 transitions. [2021-07-13 20:13:20,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:20,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 3330 transitions. [2021-07-13 20:13:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:20,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:20,473 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:20,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:20,674 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:20,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1246199643, now seen corresponding path program 152 times [2021-07-13 20:13:20,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:20,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146701411] [2021-07-13 20:13:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:21,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146701411] [2021-07-13 20:13:21,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146701411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:21,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355477640] [2021-07-13 20:13:21,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:21,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:21,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:21,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:21,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:21,371 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-07-13 20:13:21,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-07-13 20:13:21,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:21,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:21,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:21,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-07-13 20:13:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:21,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355477640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:21,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:21,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-07-13 20:13:21,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048565334] [2021-07-13 20:13:21,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 20:13:21,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:21,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 20:13:21,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:13:21,551 INFO L87 Difference]: Start difference. First operand 1637 states and 3330 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:24,516 INFO L93 Difference]: Finished difference Result 2098 states and 4208 transitions. [2021-07-13 20:13:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:13:24,516 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:24,518 INFO L225 Difference]: With dead ends: 2098 [2021-07-13 20:13:24,518 INFO L226 Difference]: Without dead ends: 2054 [2021-07-13 20:13:24,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 2143.9ms TimeCoverageRelationStatistics Valid=432, Invalid=5730, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:13:24,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-07-13 20:13:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1644. [2021-07-13 20:13:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 2.034692635423007) internal successors, (3343), 1643 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 3343 transitions. [2021-07-13 20:13:24,533 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 3343 transitions. Word has length 40 [2021-07-13 20:13:24,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:24,533 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 3343 transitions. [2021-07-13 20:13:24,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 3343 transitions. [2021-07-13 20:13:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:24,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:24,535 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:24,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-13 20:13:24,735 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:24,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2047913347, now seen corresponding path program 153 times [2021-07-13 20:13:24,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:24,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388499880] [2021-07-13 20:13:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:25,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:25,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388499880] [2021-07-13 20:13:25,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388499880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:25,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137859556] [2021-07-13 20:13:25,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:25,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:13:25,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:25,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:13:25,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:25,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:25,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-07-13 20:13:25,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:25,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:25,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:25,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:28 [2021-07-13 20:13:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:25,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137859556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:25,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:25,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-07-13 20:13:25,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037099776] [2021-07-13 20:13:25,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:13:25,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:25,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:13:25,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:13:25,995 INFO L87 Difference]: Start difference. First operand 1644 states and 3343 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:28,089 INFO L93 Difference]: Finished difference Result 1869 states and 3772 transitions. [2021-07-13 20:13:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:13:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:28,091 INFO L225 Difference]: With dead ends: 1869 [2021-07-13 20:13:28,091 INFO L226 Difference]: Without dead ends: 1827 [2021-07-13 20:13:28,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 2122.5ms TimeCoverageRelationStatistics Valid=350, Invalid=4206, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:13:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-07-13 20:13:28,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1647. [2021-07-13 20:13:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 2.034021871202916) internal successors, (3348), 1646 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 3348 transitions. [2021-07-13 20:13:28,105 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 3348 transitions. Word has length 40 [2021-07-13 20:13:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:28,105 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 3348 transitions. [2021-07-13 20:13:28,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:28,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 3348 transitions. [2021-07-13 20:13:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:28,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:28,107 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:28,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-07-13 20:13:28,308 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:28,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:28,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1924564705, now seen corresponding path program 154 times [2021-07-13 20:13:28,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:28,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215311748] [2021-07-13 20:13:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:28,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:28,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215311748] [2021-07-13 20:13:28,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215311748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:28,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325069364] [2021-07-13 20:13:28,714 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 [2021-07-13 20:13:28,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:28,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:28,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:28,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:29,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:29,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:29,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:29,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:29,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:29,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:13:29,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:29,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:29,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:29,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:13:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:29,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325069364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:29,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:29,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:13:29,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427192705] [2021-07-13 20:13:29,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:29,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:29,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:29,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:29,344 INFO L87 Difference]: Start difference. First operand 1647 states and 3348 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:30,811 INFO L93 Difference]: Finished difference Result 1833 states and 3677 transitions. [2021-07-13 20:13:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:13:30,812 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:30,814 INFO L225 Difference]: With dead ends: 1833 [2021-07-13 20:13:30,814 INFO L226 Difference]: Without dead ends: 1769 [2021-07-13 20:13:30,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1489.5ms TimeCoverageRelationStatistics Valid=233, Invalid=2959, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:13:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-07-13 20:13:30,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1656. [2021-07-13 20:13:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.0356495468277944) internal successors, (3369), 1655 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 3369 transitions. [2021-07-13 20:13:30,831 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 3369 transitions. Word has length 40 [2021-07-13 20:13:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:30,832 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 3369 transitions. [2021-07-13 20:13:30,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 3369 transitions. [2021-07-13 20:13:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:30,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:30,834 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:31,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-07-13 20:13:31,058 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:31,058 INFO L82 PathProgramCache]: Analyzing trace with hash 691827169, now seen corresponding path program 155 times [2021-07-13 20:13:31,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:31,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453103656] [2021-07-13 20:13:31,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:31,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:31,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453103656] [2021-07-13 20:13:31,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453103656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:31,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274075077] [2021-07-13 20:13:31,575 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 [2021-07-13 20:13:31,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:13:31,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:31,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:13:31,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:32,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:32,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:32,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:32,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:32,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:13:32,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:32,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:32,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:32,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:13:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:32,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274075077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:32,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:32,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 42 [2021-07-13 20:13:32,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494623391] [2021-07-13 20:13:32,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:13:32,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:13:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1665, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:13:32,476 INFO L87 Difference]: Start difference. First operand 1656 states and 3369 transitions. Second operand has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:34,511 INFO L93 Difference]: Finished difference Result 1870 states and 3744 transitions. [2021-07-13 20:13:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:13:34,511 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:34,513 INFO L225 Difference]: With dead ends: 1870 [2021-07-13 20:13:34,513 INFO L226 Difference]: Without dead ends: 1806 [2021-07-13 20:13:34,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1953.9ms TimeCoverageRelationStatistics Valid=283, Invalid=3749, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:13:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-07-13 20:13:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1657. [2021-07-13 20:13:34,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 2.0356280193236715) internal successors, (3371), 1656 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 3371 transitions. [2021-07-13 20:13:34,534 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 3371 transitions. Word has length 40 [2021-07-13 20:13:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:34,534 INFO L482 AbstractCegarLoop]: Abstraction has 1657 states and 3371 transitions. [2021-07-13 20:13:34,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:34,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 3371 transitions. [2021-07-13 20:13:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:34,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:34,536 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:34,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:34,753 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1105661727, now seen corresponding path program 156 times [2021-07-13 20:13:34,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:34,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486709195] [2021-07-13 20:13:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:35,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:35,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486709195] [2021-07-13 20:13:35,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486709195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:35,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225664507] [2021-07-13 20:13:35,254 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 [2021-07-13 20:13:35,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:13:35,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:35,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:13:35,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:35,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:35,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:13:35,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:36,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:36,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:36,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:13:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:36,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225664507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:36,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:36,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-13 20:13:36,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852271897] [2021-07-13 20:13:36,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:13:36,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:36,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:13:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:13:36,209 INFO L87 Difference]: Start difference. First operand 1657 states and 3371 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:39,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:39,101 INFO L93 Difference]: Finished difference Result 1870 states and 3754 transitions. [2021-07-13 20:13:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:13:39,102 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:39,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:39,104 INFO L225 Difference]: With dead ends: 1870 [2021-07-13 20:13:39,104 INFO L226 Difference]: Without dead ends: 1810 [2021-07-13 20:13:39,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2655.1ms TimeCoverageRelationStatistics Valid=332, Invalid=4360, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:13:39,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-07-13 20:13:39,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1666. [2021-07-13 20:13:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.0354354354354354) internal successors, (3389), 1665 states have internal predecessors, (3389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 3389 transitions. [2021-07-13 20:13:39,119 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 3389 transitions. Word has length 40 [2021-07-13 20:13:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:39,119 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 3389 transitions. [2021-07-13 20:13:39,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:39,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 3389 transitions. [2021-07-13 20:13:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:39,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:39,121 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:39,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:39,323 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:39,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:39,325 INFO L82 PathProgramCache]: Analyzing trace with hash 434097121, now seen corresponding path program 157 times [2021-07-13 20:13:39,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:39,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827931317] [2021-07-13 20:13:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:39,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:39,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:39,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827931317] [2021-07-13 20:13:39,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827931317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:39,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436404105] [2021-07-13 20:13:39,878 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 [2021-07-13 20:13:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:39,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:39,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:40,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:40,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:40,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:40,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:40,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:40,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:40,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:13:40,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:40,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:40,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:40,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:13:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:40,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436404105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:40,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:40,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:13:40,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740576486] [2021-07-13 20:13:40,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:40,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:40,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:40,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:40,856 INFO L87 Difference]: Start difference. First operand 1666 states and 3389 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:42,809 INFO L93 Difference]: Finished difference Result 1953 states and 3910 transitions. [2021-07-13 20:13:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:13:42,810 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:42,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:42,812 INFO L225 Difference]: With dead ends: 1953 [2021-07-13 20:13:42,812 INFO L226 Difference]: Without dead ends: 1892 [2021-07-13 20:13:42,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1983.6ms TimeCoverageRelationStatistics Valid=271, Invalid=3389, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:13:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-07-13 20:13:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1668. [2021-07-13 20:13:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1667 states have (on average 2.035392921415717) internal successors, (3393), 1667 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 3393 transitions. [2021-07-13 20:13:42,828 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 3393 transitions. Word has length 40 [2021-07-13 20:13:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:42,828 INFO L482 AbstractCegarLoop]: Abstraction has 1668 states and 3393 transitions. [2021-07-13 20:13:42,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 3393 transitions. [2021-07-13 20:13:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:42,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:42,830 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:43,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:43,033 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:43,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1819719711, now seen corresponding path program 158 times [2021-07-13 20:13:43,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:43,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708702712] [2021-07-13 20:13:43,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:43,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:43,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708702712] [2021-07-13 20:13:43,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708702712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:43,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989735490] [2021-07-13 20:13:43,445 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 [2021-07-13 20:13:43,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:13:43,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:43,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:43,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:43,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:43,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:43,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:43,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:43,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:43,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:43,936 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:13:43,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:43,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:43,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:43,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:13:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:44,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989735490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:44,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:44,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:13:44,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403233566] [2021-07-13 20:13:44,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:44,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:44,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:44,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:44,082 INFO L87 Difference]: Start difference. First operand 1668 states and 3393 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:46,346 INFO L93 Difference]: Finished difference Result 1992 states and 3993 transitions. [2021-07-13 20:13:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:13:46,346 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:46,349 INFO L225 Difference]: With dead ends: 1992 [2021-07-13 20:13:46,349 INFO L226 Difference]: Without dead ends: 1944 [2021-07-13 20:13:46,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1811.6ms TimeCoverageRelationStatistics Valid=301, Invalid=3859, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:13:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-07-13 20:13:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1669. [2021-07-13 20:13:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 2.0353717026378897) internal successors, (3395), 1668 states have internal predecessors, (3395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 3395 transitions. [2021-07-13 20:13:46,363 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 3395 transitions. Word has length 40 [2021-07-13 20:13:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:46,363 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 3395 transitions. [2021-07-13 20:13:46,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 3395 transitions. [2021-07-13 20:13:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:46,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:46,365 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:46,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:46,565 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:46,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1178609121, now seen corresponding path program 159 times [2021-07-13 20:13:46,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:46,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288083011] [2021-07-13 20:13:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:46,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:46,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288083011] [2021-07-13 20:13:46,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288083011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:46,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650439861] [2021-07-13 20:13:46,960 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 [2021-07-13 20:13:46,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:13:46,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:46,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:46,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:47,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:47,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:47,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:47,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:47,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:13:47,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:47,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:47,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:47,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:13:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:47,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650439861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:47,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:47,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:13:47,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271809832] [2021-07-13 20:13:47,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:47,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:47,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:47,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:47,561 INFO L87 Difference]: Start difference. First operand 1669 states and 3395 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:49,581 INFO L93 Difference]: Finished difference Result 2019 states and 4049 transitions. [2021-07-13 20:13:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:13:49,581 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:49,583 INFO L225 Difference]: With dead ends: 2019 [2021-07-13 20:13:49,583 INFO L226 Difference]: Without dead ends: 1987 [2021-07-13 20:13:49,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1840.6ms TimeCoverageRelationStatistics Valid=332, Invalid=4090, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:13:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-07-13 20:13:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1670. [2021-07-13 20:13:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 2.035350509286998) internal successors, (3397), 1669 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 3397 transitions. [2021-07-13 20:13:49,598 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 3397 transitions. Word has length 40 [2021-07-13 20:13:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:49,598 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 3397 transitions. [2021-07-13 20:13:49,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 3397 transitions. [2021-07-13 20:13:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:49,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:49,600 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:49,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-07-13 20:13:49,809 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1690115809, now seen corresponding path program 160 times [2021-07-13 20:13:49,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:49,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328258485] [2021-07-13 20:13:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:50,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:50,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328258485] [2021-07-13 20:13:50,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328258485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:50,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970856300] [2021-07-13 20:13:50,244 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 [2021-07-13 20:13:50,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:13:50,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:50,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:50,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:50,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:50,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:50,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:50,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:50,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:50,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:13:50,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:50,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:50,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:50,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:13:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:50,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970856300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:50,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:50,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:13:50,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222301495] [2021-07-13 20:13:50,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:50,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:50,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:50,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:50,858 INFO L87 Difference]: Start difference. First operand 1670 states and 3397 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:53,390 INFO L93 Difference]: Finished difference Result 2095 states and 4196 transitions. [2021-07-13 20:13:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:13:53,391 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:53,393 INFO L225 Difference]: With dead ends: 2095 [2021-07-13 20:13:53,393 INFO L226 Difference]: Without dead ends: 2051 [2021-07-13 20:13:53,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 2102.1ms TimeCoverageRelationStatistics Valid=380, Invalid=4876, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:13:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-07-13 20:13:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1662. [2021-07-13 20:13:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.03371462974112) internal successors, (3378), 1661 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3378 transitions. [2021-07-13 20:13:53,408 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3378 transitions. Word has length 40 [2021-07-13 20:13:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:53,408 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 3378 transitions. [2021-07-13 20:13:53,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3378 transitions. [2021-07-13 20:13:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:53,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:53,410 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:53,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-13 20:13:53,610 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:53,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:53,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1743439621, now seen corresponding path program 161 times [2021-07-13 20:13:53,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:53,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601531996] [2021-07-13 20:13:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:54,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:54,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601531996] [2021-07-13 20:13:54,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601531996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:54,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169721429] [2021-07-13 20:13:54,031 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 [2021-07-13 20:13:54,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:13:54,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:54,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:13:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:54,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:54,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:54,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:54,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:54,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-07-13 20:13:54,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:54,449 INFO L628 ElimStorePlain]: treesize reduction 5, result has 85.3 percent of original size [2021-07-13 20:13:54,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:54,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:16 [2021-07-13 20:13:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:54,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169721429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:54,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:54,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-13 20:13:54,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527424050] [2021-07-13 20:13:54,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:13:54,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:54,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:13:54,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:13:54,740 INFO L87 Difference]: Start difference. First operand 1662 states and 3378 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:56,467 INFO L93 Difference]: Finished difference Result 1882 states and 3797 transitions. [2021-07-13 20:13:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:13:56,467 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:56,469 INFO L225 Difference]: With dead ends: 1882 [2021-07-13 20:13:56,469 INFO L226 Difference]: Without dead ends: 1840 [2021-07-13 20:13:56,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1717.7ms TimeCoverageRelationStatistics Valid=324, Invalid=3582, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:13:56,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-07-13 20:13:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1650. [2021-07-13 20:13:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 2.0339599757428743) internal successors, (3354), 1649 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 3354 transitions. [2021-07-13 20:13:56,484 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 3354 transitions. Word has length 40 [2021-07-13 20:13:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:56,484 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 3354 transitions. [2021-07-13 20:13:56,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 3354 transitions. [2021-07-13 20:13:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:56,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:56,486 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:56,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:56,686 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:56,686 INFO L82 PathProgramCache]: Analyzing trace with hash -956912675, now seen corresponding path program 162 times [2021-07-13 20:13:56,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:56,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839921815] [2021-07-13 20:13:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:13:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:57,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:13:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839921815] [2021-07-13 20:13:57,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839921815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:57,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551936580] [2021-07-13 20:13:57,173 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 [2021-07-13 20:13:57,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:13:57,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:13:57,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:13:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:13:57,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:13:57,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:13:57,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:13:57,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:13:57,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:13:57,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:13:57,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:13:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:13:57,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551936580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:13:57,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:13:57,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:13:57,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818730311] [2021-07-13 20:13:57,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:13:57,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:13:57,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:13:57,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:13:57,869 INFO L87 Difference]: Start difference. First operand 1650 states and 3354 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:13:59,393 INFO L93 Difference]: Finished difference Result 1785 states and 3597 transitions. [2021-07-13 20:13:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:13:59,393 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:13:59,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:13:59,395 INFO L225 Difference]: With dead ends: 1785 [2021-07-13 20:13:59,396 INFO L226 Difference]: Without dead ends: 1721 [2021-07-13 20:13:59,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1583.4ms TimeCoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:13:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-07-13 20:13:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1653. [2021-07-13 20:13:59,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.0338983050847457) internal successors, (3360), 1652 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3360 transitions. [2021-07-13 20:13:59,415 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3360 transitions. Word has length 40 [2021-07-13 20:13:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:13:59,415 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 3360 transitions. [2021-07-13 20:13:59,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:13:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3360 transitions. [2021-07-13 20:13:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:13:59,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:13:59,417 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:13:59,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-13 20:13:59,629 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:13:59,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:13:59,629 INFO L82 PathProgramCache]: Analyzing trace with hash -543078117, now seen corresponding path program 163 times [2021-07-13 20:13:59,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:13:59,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701670274] [2021-07-13 20:13:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:13:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:00,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:00,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701670274] [2021-07-13 20:14:00,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701670274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:00,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426208232] [2021-07-13 20:14:00,020 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 [2021-07-13 20:14:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:00,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:00,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:00,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:00,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:14:00,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:00,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:00,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:00,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:14:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:00,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426208232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:00,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:00,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:00,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733213377] [2021-07-13 20:14:00,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:00,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:00,633 INFO L87 Difference]: Start difference. First operand 1653 states and 3360 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:02,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:02,258 INFO L93 Difference]: Finished difference Result 1790 states and 3610 transitions. [2021-07-13 20:14:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:14:02,258 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:02,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:02,260 INFO L225 Difference]: With dead ends: 1790 [2021-07-13 20:14:02,261 INFO L226 Difference]: Without dead ends: 1730 [2021-07-13 20:14:02,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1510.2ms TimeCoverageRelationStatistics Valid=245, Invalid=2947, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:14:02,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-07-13 20:14:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1659. [2021-07-13 20:14:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 2.033775633293124) internal successors, (3372), 1658 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 3372 transitions. [2021-07-13 20:14:02,276 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 3372 transitions. Word has length 40 [2021-07-13 20:14:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:02,276 INFO L482 AbstractCegarLoop]: Abstraction has 1659 states and 3372 transitions. [2021-07-13 20:14:02,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 3372 transitions. [2021-07-13 20:14:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:02,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:02,278 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:02,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-13 20:14:02,478 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:02,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:02,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1214642723, now seen corresponding path program 164 times [2021-07-13 20:14:02,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:02,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80604300] [2021-07-13 20:14:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:02,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:02,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80604300] [2021-07-13 20:14:02,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80604300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:02,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129396360] [2021-07-13 20:14:02,872 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 [2021-07-13 20:14:02,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:02,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:02,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:02,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:03,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:03,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:03,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:03,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:03,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:03,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:14:03,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:03,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:03,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:03,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:14:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:03,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129396360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:03,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:03,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:03,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973605483] [2021-07-13 20:14:03,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:03,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:03,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:03,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:03,503 INFO L87 Difference]: Start difference. First operand 1659 states and 3372 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:05,343 INFO L93 Difference]: Finished difference Result 1821 states and 3675 transitions. [2021-07-13 20:14:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:14:05,343 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:05,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:05,345 INFO L225 Difference]: With dead ends: 1821 [2021-07-13 20:14:05,345 INFO L226 Difference]: Without dead ends: 1773 [2021-07-13 20:14:05,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1555.1ms TimeCoverageRelationStatistics Valid=277, Invalid=3145, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:14:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-07-13 20:14:05,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1660. [2021-07-13 20:14:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 2.0337552742616034) internal successors, (3374), 1659 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 3374 transitions. [2021-07-13 20:14:05,361 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 3374 transitions. Word has length 40 [2021-07-13 20:14:05,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:05,361 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 3374 transitions. [2021-07-13 20:14:05,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 3374 transitions. [2021-07-13 20:14:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:05,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:05,363 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:05,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-13 20:14:05,563 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:05,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:05,563 INFO L82 PathProgramCache]: Analyzing trace with hash 170979867, now seen corresponding path program 165 times [2021-07-13 20:14:05,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:05,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778368424] [2021-07-13 20:14:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:05,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:05,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778368424] [2021-07-13 20:14:05,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778368424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:05,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118931566] [2021-07-13 20:14:05,980 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 [2021-07-13 20:14:06,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:14:06,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:06,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:14:06,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:06,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:06,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:06,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:06,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:06,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:06,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:06,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:14:06,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:06,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:06,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:06,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:14:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:06,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118931566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:06,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:06,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:06,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636288860] [2021-07-13 20:14:06,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:06,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:06,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:06,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:06,630 INFO L87 Difference]: Start difference. First operand 1660 states and 3374 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:08,979 INFO L93 Difference]: Finished difference Result 1879 states and 3796 transitions. [2021-07-13 20:14:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:14:08,979 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:08,982 INFO L225 Difference]: With dead ends: 1879 [2021-07-13 20:14:08,982 INFO L226 Difference]: Without dead ends: 1831 [2021-07-13 20:14:08,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 2011.8ms TimeCoverageRelationStatistics Valid=308, Invalid=3598, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:14:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-07-13 20:14:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1664. [2021-07-13 20:14:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.0336740829825617) internal successors, (3382), 1663 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 3382 transitions. [2021-07-13 20:14:09,002 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 3382 transitions. Word has length 40 [2021-07-13 20:14:09,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:09,002 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 3382 transitions. [2021-07-13 20:14:09,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 3382 transitions. [2021-07-13 20:14:09,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:09,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:09,004 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:09,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:09,228 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash -470130723, now seen corresponding path program 166 times [2021-07-13 20:14:09,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:09,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533558128] [2021-07-13 20:14:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:09,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533558128] [2021-07-13 20:14:09,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533558128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184824935] [2021-07-13 20:14:09,741 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 [2021-07-13 20:14:09,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:09,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:09,784 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:09,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:10,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:10,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:10,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:10,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:10,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:14:10,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:10,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:10,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:10,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:14:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:10,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184824935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:10,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:10,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:10,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632518677] [2021-07-13 20:14:10,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:10,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:10,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:10,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:10,531 INFO L87 Difference]: Start difference. First operand 1664 states and 3382 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:12,651 INFO L93 Difference]: Finished difference Result 1901 states and 3843 transitions. [2021-07-13 20:14:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:14:12,651 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:12,654 INFO L225 Difference]: With dead ends: 1901 [2021-07-13 20:14:12,654 INFO L226 Difference]: Without dead ends: 1869 [2021-07-13 20:14:12,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 2084.7ms TimeCoverageRelationStatistics Valid=318, Invalid=3588, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:14:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-07-13 20:14:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1665. [2021-07-13 20:14:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 2.0336538461538463) internal successors, (3384), 1664 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 3384 transitions. [2021-07-13 20:14:12,673 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 3384 transitions. Word has length 40 [2021-07-13 20:14:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:12,673 INFO L482 AbstractCegarLoop]: Abstraction has 1665 states and 3384 transitions. [2021-07-13 20:14:12,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 3384 transitions. [2021-07-13 20:14:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:12,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:12,675 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:12,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-13 20:14:12,899 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:12,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:12,900 INFO L82 PathProgramCache]: Analyzing trace with hash 956111643, now seen corresponding path program 167 times [2021-07-13 20:14:12,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:12,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702353948] [2021-07-13 20:14:12,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:13,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:13,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702353948] [2021-07-13 20:14:13,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702353948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:13,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581612244] [2021-07-13 20:14:13,409 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 [2021-07-13 20:14:13,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:14:13,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:14:13,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:13,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:13,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:13,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:13,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:13,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:14:13,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:13,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:13,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:13,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:14:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:14,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581612244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:14,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:14,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:14,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123420986] [2021-07-13 20:14:14,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:14,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:14,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:14,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:14,135 INFO L87 Difference]: Start difference. First operand 1665 states and 3384 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:16,943 INFO L93 Difference]: Finished difference Result 1968 states and 3978 transitions. [2021-07-13 20:14:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:14:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:16,947 INFO L225 Difference]: With dead ends: 1968 [2021-07-13 20:14:16,947 INFO L226 Difference]: Without dead ends: 1924 [2021-07-13 20:14:16,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 2387.6ms TimeCoverageRelationStatistics Valid=382, Invalid=4448, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:14:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-07-13 20:14:16,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1662. [2021-07-13 20:14:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.03371462974112) internal successors, (3378), 1661 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3378 transitions. [2021-07-13 20:14:16,970 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3378 transitions. Word has length 40 [2021-07-13 20:14:16,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:16,970 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 3378 transitions. [2021-07-13 20:14:16,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3378 transitions. [2021-07-13 20:14:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:16,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:16,972 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:17,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:17,192 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:17,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:17,192 INFO L82 PathProgramCache]: Analyzing trace with hash 931216087, now seen corresponding path program 168 times [2021-07-13 20:14:17,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:17,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420506396] [2021-07-13 20:14:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:17,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:17,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420506396] [2021-07-13 20:14:17,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420506396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:17,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764756861] [2021-07-13 20:14:17,717 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 [2021-07-13 20:14:17,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:14:17,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:17,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:14:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:18,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:18,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:18,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:14:18,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:18,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:18,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:18,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:16 [2021-07-13 20:14:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:18,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764756861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:18,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:18,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:18,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279419210] [2021-07-13 20:14:18,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:18,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:18,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:18,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:18,446 INFO L87 Difference]: Start difference. First operand 1662 states and 3378 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:20,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:20,078 INFO L93 Difference]: Finished difference Result 1796 states and 3627 transitions. [2021-07-13 20:14:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:14:20,079 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:20,081 INFO L225 Difference]: With dead ends: 1796 [2021-07-13 20:14:20,081 INFO L226 Difference]: Without dead ends: 1768 [2021-07-13 20:14:20,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1749.9ms TimeCoverageRelationStatistics Valid=257, Invalid=3165, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:14:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-07-13 20:14:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1655. [2021-07-13 20:14:20,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 2.033857315598549) internal successors, (3364), 1654 states have internal predecessors, (3364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 3364 transitions. [2021-07-13 20:14:20,097 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 3364 transitions. Word has length 40 [2021-07-13 20:14:20,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:20,097 INFO L482 AbstractCegarLoop]: Abstraction has 1655 states and 3364 transitions. [2021-07-13 20:14:20,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:20,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 3364 transitions. [2021-07-13 20:14:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:20,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:20,099 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:20,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:20,299 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1074502817, now seen corresponding path program 169 times [2021-07-13 20:14:20,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:20,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381871467] [2021-07-13 20:14:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:20,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:20,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381871467] [2021-07-13 20:14:20,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381871467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:20,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413407472] [2021-07-13 20:14:20,706 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 [2021-07-13 20:14:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:20,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:20,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:21,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:21,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:21,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:21,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:21,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:21,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:21,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:14:21,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:21,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:21,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:21,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:14:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:21,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413407472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:21,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:21,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:21,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488626570] [2021-07-13 20:14:21,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:21,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:21,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:21,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:21,325 INFO L87 Difference]: Start difference. First operand 1655 states and 3364 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:23,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:23,333 INFO L93 Difference]: Finished difference Result 1816 states and 3662 transitions. [2021-07-13 20:14:23,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:14:23,334 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:23,336 INFO L225 Difference]: With dead ends: 1816 [2021-07-13 20:14:23,336 INFO L226 Difference]: Without dead ends: 1756 [2021-07-13 20:14:23,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1707.7ms TimeCoverageRelationStatistics Valid=262, Invalid=3278, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:14:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-07-13 20:14:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1664. [2021-07-13 20:14:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.0336740829825617) internal successors, (3382), 1663 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 3382 transitions. [2021-07-13 20:14:23,351 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 3382 transitions. Word has length 40 [2021-07-13 20:14:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:23,351 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 3382 transitions. [2021-07-13 20:14:23,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 3382 transitions. [2021-07-13 20:14:23,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:23,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:23,353 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:23,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:23,554 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:23,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:23,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1746067423, now seen corresponding path program 170 times [2021-07-13 20:14:23,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:23,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669595987] [2021-07-13 20:14:23,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:23,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:23,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669595987] [2021-07-13 20:14:23,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669595987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:23,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971458591] [2021-07-13 20:14:23,953 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 [2021-07-13 20:14:23,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:23,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:23,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:23,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:24,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:24,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:24,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:14:24,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:24,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:24,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:24,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:14:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:24,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971458591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:24,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:24,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:24,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141123110] [2021-07-13 20:14:24,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:24,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:24,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:24,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:24,570 INFO L87 Difference]: Start difference. First operand 1664 states and 3382 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:26,445 INFO L93 Difference]: Finished difference Result 1832 states and 3697 transitions. [2021-07-13 20:14:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:14:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:26,448 INFO L225 Difference]: With dead ends: 1832 [2021-07-13 20:14:26,448 INFO L226 Difference]: Without dead ends: 1784 [2021-07-13 20:14:26,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1762.0ms TimeCoverageRelationStatistics Valid=316, Invalid=3590, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:14:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-07-13 20:14:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1666. [2021-07-13 20:14:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.0336336336336336) internal successors, (3386), 1665 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 3386 transitions. [2021-07-13 20:14:26,462 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 3386 transitions. Word has length 40 [2021-07-13 20:14:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:26,462 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 3386 transitions. [2021-07-13 20:14:26,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:26,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 3386 transitions. [2021-07-13 20:14:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:26,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:26,464 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:26,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-13 20:14:26,664 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:26,664 INFO L82 PathProgramCache]: Analyzing trace with hash -360444833, now seen corresponding path program 171 times [2021-07-13 20:14:26,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:26,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162887227] [2021-07-13 20:14:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:27,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:27,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162887227] [2021-07-13 20:14:27,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162887227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:27,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015327484] [2021-07-13 20:14:27,058 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 [2021-07-13 20:14:27,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:14:27,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:27,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:14:27,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:27,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:27,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:27,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:27,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:14:27,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:27,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:27,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:27,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:14:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:27,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015327484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:27,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:27,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-07-13 20:14:27,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324042901] [2021-07-13 20:14:27,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:14:27,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:27,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:14:27,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:14:27,841 INFO L87 Difference]: Start difference. First operand 1666 states and 3386 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:29,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:29,936 INFO L93 Difference]: Finished difference Result 1885 states and 3808 transitions. [2021-07-13 20:14:29,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:14:29,936 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:29,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:29,938 INFO L225 Difference]: With dead ends: 1885 [2021-07-13 20:14:29,938 INFO L226 Difference]: Without dead ends: 1841 [2021-07-13 20:14:29,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1958.6ms TimeCoverageRelationStatistics Valid=369, Invalid=4323, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:14:29,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-07-13 20:14:29,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1669. [2021-07-13 20:14:29,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 2.0335731414868103) internal successors, (3392), 1668 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 3392 transitions. [2021-07-13 20:14:29,952 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 3392 transitions. Word has length 40 [2021-07-13 20:14:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:29,952 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 3392 transitions. [2021-07-13 20:14:29,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 3392 transitions. [2021-07-13 20:14:29,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:29,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:29,953 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:30,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-13 20:14:30,154 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:30,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1001555423, now seen corresponding path program 172 times [2021-07-13 20:14:30,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:30,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273496401] [2021-07-13 20:14:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:30,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:30,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273496401] [2021-07-13 20:14:30,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273496401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:30,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474104932] [2021-07-13 20:14:30,631 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 [2021-07-13 20:14:30,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:30,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:30,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:30,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:31,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:31,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:31,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:31,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:31,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:14:31,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:31,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:31,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:31,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:14:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:31,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474104932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:31,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:31,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:31,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075306198] [2021-07-13 20:14:31,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:31,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:31,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:31,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:31,363 INFO L87 Difference]: Start difference. First operand 1669 states and 3392 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:33,278 INFO L93 Difference]: Finished difference Result 1920 states and 3881 transitions. [2021-07-13 20:14:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:14:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:33,281 INFO L225 Difference]: With dead ends: 1920 [2021-07-13 20:14:33,281 INFO L226 Difference]: Without dead ends: 1888 [2021-07-13 20:14:33,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1992.3ms TimeCoverageRelationStatistics Valid=368, Invalid=3922, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:14:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-07-13 20:14:33,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1670. [2021-07-13 20:14:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 2.0335530257639305) internal successors, (3394), 1669 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 3394 transitions. [2021-07-13 20:14:33,295 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 3394 transitions. Word has length 40 [2021-07-13 20:14:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:33,295 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 3394 transitions. [2021-07-13 20:14:33,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 3394 transitions. [2021-07-13 20:14:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:33,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:33,297 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:33,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 20:14:33,498 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash 424686943, now seen corresponding path program 173 times [2021-07-13 20:14:33,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:33,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786963216] [2021-07-13 20:14:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:33,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:33,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786963216] [2021-07-13 20:14:33,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786963216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:33,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847811057] [2021-07-13 20:14:33,891 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 [2021-07-13 20:14:33,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:14:33,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:33,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:14:33,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:34,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:34,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:34,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:34,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:34,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:14:34,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:34,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:34,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:34,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:14:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:34,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847811057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:34,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:34,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:34,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424996581] [2021-07-13 20:14:34,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:34,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:34,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:34,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:34,460 INFO L87 Difference]: Start difference. First operand 1670 states and 3394 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:36,946 INFO L93 Difference]: Finished difference Result 1996 states and 4031 transitions. [2021-07-13 20:14:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:14:36,947 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:36,949 INFO L225 Difference]: With dead ends: 1996 [2021-07-13 20:14:36,949 INFO L226 Difference]: Without dead ends: 1952 [2021-07-13 20:14:36,949 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 2102.3ms TimeCoverageRelationStatistics Valid=460, Invalid=5240, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:14:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2021-07-13 20:14:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1666. [2021-07-13 20:14:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.0336336336336336) internal successors, (3386), 1665 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 3386 transitions. [2021-07-13 20:14:36,963 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 3386 transitions. Word has length 40 [2021-07-13 20:14:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:36,963 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 3386 transitions. [2021-07-13 20:14:36,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 3386 transitions. [2021-07-13 20:14:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:36,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:36,965 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:37,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-13 20:14:37,166 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:37,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1990940629, now seen corresponding path program 174 times [2021-07-13 20:14:37,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:37,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216946941] [2021-07-13 20:14:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:37,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:37,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216946941] [2021-07-13 20:14:37,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216946941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:37,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342508730] [2021-07-13 20:14:37,546 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 [2021-07-13 20:14:37,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:14:37,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:37,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:14:37,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:37,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:37,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:37,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:37,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:37,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:37,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:37,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-07-13 20:14:37,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:38,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:38,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:38,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:28 [2021-07-13 20:14:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:38,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342508730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:38,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:38,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-07-13 20:14:38,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281405533] [2021-07-13 20:14:38,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:14:38,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:38,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:14:38,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1529, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:14:38,563 INFO L87 Difference]: Start difference. First operand 1666 states and 3386 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:41,291 INFO L93 Difference]: Finished difference Result 1809 states and 3648 transitions. [2021-07-13 20:14:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:14:41,291 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:41,294 INFO L225 Difference]: With dead ends: 1809 [2021-07-13 20:14:41,294 INFO L226 Difference]: Without dead ends: 1767 [2021-07-13 20:14:41,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2530.5ms TimeCoverageRelationStatistics Valid=349, Invalid=4207, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:14:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-07-13 20:14:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1658. [2021-07-13 20:14:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.0337960168980085) internal successors, (3370), 1657 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 3370 transitions. [2021-07-13 20:14:41,313 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 3370 transitions. Word has length 40 [2021-07-13 20:14:41,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:41,313 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 3370 transitions. [2021-07-13 20:14:41,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 3370 transitions. [2021-07-13 20:14:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:41,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:41,315 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:41,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 20:14:41,538 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:41,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1204990365, now seen corresponding path program 175 times [2021-07-13 20:14:41,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:41,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415819229] [2021-07-13 20:14:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:42,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:42,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415819229] [2021-07-13 20:14:42,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415819229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:42,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509869307] [2021-07-13 20:14:42,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:14:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:42,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:42,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:42,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:42,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:42,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:42,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:42,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:42,548 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:14:42,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:42,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:42,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:42,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:14:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:42,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509869307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:42,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:42,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:42,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465703657] [2021-07-13 20:14:42,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:42,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:42,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:42,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:42,689 INFO L87 Difference]: Start difference. First operand 1658 states and 3370 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:44,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:44,475 INFO L93 Difference]: Finished difference Result 1800 states and 3631 transitions. [2021-07-13 20:14:44,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:14:44,475 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:44,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:44,478 INFO L225 Difference]: With dead ends: 1800 [2021-07-13 20:14:44,478 INFO L226 Difference]: Without dead ends: 1752 [2021-07-13 20:14:44,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1749.7ms TimeCoverageRelationStatistics Valid=279, Invalid=3261, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:14:44,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-07-13 20:14:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1661. [2021-07-13 20:14:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 2.0337349397590363) internal successors, (3376), 1660 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 3376 transitions. [2021-07-13 20:14:44,493 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 3376 transitions. Word has length 40 [2021-07-13 20:14:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:44,493 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 3376 transitions. [2021-07-13 20:14:44,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:44,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 3376 transitions. [2021-07-13 20:14:44,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:44,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:44,495 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:44,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:44,695 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:44,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:44,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1704354341, now seen corresponding path program 176 times [2021-07-13 20:14:44,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:44,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773390500] [2021-07-13 20:14:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:45,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:45,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773390500] [2021-07-13 20:14:45,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773390500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:45,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959948058] [2021-07-13 20:14:45,180 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 [2021-07-13 20:14:45,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:14:45,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:45,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:45,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:45,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:45,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:45,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:45,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:45,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:14:45,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:45,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:45,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:45,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:14:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:45,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959948058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:45,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:45,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:45,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212109714] [2021-07-13 20:14:45,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:45,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:45,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:45,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:45,767 INFO L87 Difference]: Start difference. First operand 1661 states and 3376 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:47,477 INFO L93 Difference]: Finished difference Result 1833 states and 3700 transitions. [2021-07-13 20:14:47,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:14:47,477 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:47,479 INFO L225 Difference]: With dead ends: 1833 [2021-07-13 20:14:47,479 INFO L226 Difference]: Without dead ends: 1789 [2021-07-13 20:14:47,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1709.3ms TimeCoverageRelationStatistics Valid=293, Invalid=3367, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:14:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-07-13 20:14:47,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1664. [2021-07-13 20:14:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.0336740829825617) internal successors, (3382), 1663 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 3382 transitions. [2021-07-13 20:14:47,493 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 3382 transitions. Word has length 40 [2021-07-13 20:14:47,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:47,493 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 3382 transitions. [2021-07-13 20:14:47,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 3382 transitions. [2021-07-13 20:14:47,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:47,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:47,495 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:47,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-07-13 20:14:47,696 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:47,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1949502365, now seen corresponding path program 177 times [2021-07-13 20:14:47,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:47,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948691871] [2021-07-13 20:14:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:48,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:48,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948691871] [2021-07-13 20:14:48,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948691871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:48,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941991859] [2021-07-13 20:14:48,084 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 [2021-07-13 20:14:48,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:14:48,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:48,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:48,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:48,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:48,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:48,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:48,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:48,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:48,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:48,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:14:48,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:48,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:48,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:48,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:14:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:48,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941991859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:48,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:48,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:48,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507868189] [2021-07-13 20:14:48,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:48,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:48,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:48,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:48,738 INFO L87 Difference]: Start difference. First operand 1664 states and 3382 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:50,653 INFO L93 Difference]: Finished difference Result 1843 states and 3720 transitions. [2021-07-13 20:14:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:14:50,654 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:50,656 INFO L225 Difference]: With dead ends: 1843 [2021-07-13 20:14:50,657 INFO L226 Difference]: Without dead ends: 1811 [2021-07-13 20:14:50,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1816.6ms TimeCoverageRelationStatistics Valid=346, Invalid=3686, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:14:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-07-13 20:14:50,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1665. [2021-07-13 20:14:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 2.0336538461538463) internal successors, (3384), 1664 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:50,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 3384 transitions. [2021-07-13 20:14:50,676 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 3384 transitions. Word has length 40 [2021-07-13 20:14:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:50,676 INFO L482 AbstractCegarLoop]: Abstraction has 1665 states and 3384 transitions. [2021-07-13 20:14:50,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 3384 transitions. [2021-07-13 20:14:50,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:50,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:50,678 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:50,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:50,901 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash -919222565, now seen corresponding path program 178 times [2021-07-13 20:14:50,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:50,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868950112] [2021-07-13 20:14:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:51,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:51,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868950112] [2021-07-13 20:14:51,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868950112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:51,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615296125] [2021-07-13 20:14:51,462 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 [2021-07-13 20:14:51,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:14:51,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:51,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:14:51,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:51,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:51,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:51,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:51,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:51,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:14:51,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:51,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:51,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:51,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:14:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:52,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615296125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:52,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:52,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:14:52,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558119311] [2021-07-13 20:14:52,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:14:52,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:52,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:14:52,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:14:52,150 INFO L87 Difference]: Start difference. First operand 1665 states and 3384 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:53,677 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-07-13 20:14:55,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:55,175 INFO L93 Difference]: Finished difference Result 1909 states and 3849 transitions. [2021-07-13 20:14:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:14:55,175 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:55,178 INFO L225 Difference]: With dead ends: 1909 [2021-07-13 20:14:55,178 INFO L226 Difference]: Without dead ends: 1853 [2021-07-13 20:14:55,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 2684.2ms TimeCoverageRelationStatistics Valid=468, Invalid=5082, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:14:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-07-13 20:14:55,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1667. [2021-07-13 20:14:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 2.033013205282113) internal successors, (3387), 1666 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 3387 transitions. [2021-07-13 20:14:55,197 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 3387 transitions. Word has length 40 [2021-07-13 20:14:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:55,197 INFO L482 AbstractCegarLoop]: Abstraction has 1667 states and 3387 transitions. [2021-07-13 20:14:55,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 3387 transitions. [2021-07-13 20:14:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:55,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:55,200 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:55,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-07-13 20:14:55,424 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:55,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1833855311, now seen corresponding path program 179 times [2021-07-13 20:14:55,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:55,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013623402] [2021-07-13 20:14:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:14:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:55,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:14:55,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013623402] [2021-07-13 20:14:55,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013623402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:55,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601018507] [2021-07-13 20:14:55,937 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 [2021-07-13 20:14:55,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:14:55,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:14:55,971 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:14:55,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:14:56,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:56,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:56,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:56,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:14:56,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:14:56,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:14:56,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:14:56,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:14:56,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:14:56,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:16 [2021-07-13 20:14:56,802 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:14:56,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601018507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:14:56,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:14:56,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-13 20:14:56,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400702860] [2021-07-13 20:14:56,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:14:56,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:14:56,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:14:56,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:14:56,803 INFO L87 Difference]: Start difference. First operand 1667 states and 3387 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:59,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:14:59,359 INFO L93 Difference]: Finished difference Result 1820 states and 3671 transitions. [2021-07-13 20:14:59,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:14:59,359 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:14:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:14:59,362 INFO L225 Difference]: With dead ends: 1820 [2021-07-13 20:14:59,362 INFO L226 Difference]: Without dead ends: 1792 [2021-07-13 20:14:59,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 2319.2ms TimeCoverageRelationStatistics Valid=336, Invalid=4220, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:14:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-07-13 20:14:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1656. [2021-07-13 20:14:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.033836858006042) internal successors, (3366), 1655 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 3366 transitions. [2021-07-13 20:14:59,381 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 3366 transitions. Word has length 40 [2021-07-13 20:14:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:14:59,381 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 3366 transitions. [2021-07-13 20:14:59,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:14:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 3366 transitions. [2021-07-13 20:14:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:14:59,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:14:59,383 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:14:59,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:14:59,601 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:14:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:14:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1720310829, now seen corresponding path program 180 times [2021-07-13 20:14:59,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:14:59,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266780996] [2021-07-13 20:14:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:14:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:00,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266780996] [2021-07-13 20:15:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266780996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421406816] [2021-07-13 20:15:00,218 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 [2021-07-13 20:15:00,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:15:00,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:00,247 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:15:00,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:01,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:01,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:01,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:01,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:01,091 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-07-13 20:15:01,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 26 [2021-07-13 20:15:01,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:01,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:01,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:01,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:66, output treesize:25 [2021-07-13 20:15:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:01,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421406816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:01,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:01,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2021-07-13 20:15:01,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068737144] [2021-07-13 20:15:01,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:15:01,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:01,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:15:01,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:15:01,407 INFO L87 Difference]: Start difference. First operand 1656 states and 3366 transitions. Second operand has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:04,541 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-07-13 20:15:06,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:06,436 INFO L93 Difference]: Finished difference Result 1886 states and 3775 transitions. [2021-07-13 20:15:06,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:15:06,449 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:06,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:06,451 INFO L225 Difference]: With dead ends: 1886 [2021-07-13 20:15:06,451 INFO L226 Difference]: Without dead ends: 1755 [2021-07-13 20:15:06,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 4363.5ms TimeCoverageRelationStatistics Valid=452, Invalid=6520, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:15:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-07-13 20:15:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1668. [2021-07-13 20:15:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1667 states have (on average 2.033593281343731) internal successors, (3390), 1667 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 3390 transitions. [2021-07-13 20:15:06,471 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 3390 transitions. Word has length 40 [2021-07-13 20:15:06,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:06,471 INFO L482 AbstractCegarLoop]: Abstraction has 1668 states and 3390 transitions. [2021-07-13 20:15:06,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 40 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 3390 transitions. [2021-07-13 20:15:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:06,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:06,473 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:06,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-13 20:15:06,696 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:06,697 INFO L82 PathProgramCache]: Analyzing trace with hash 896081045, now seen corresponding path program 181 times [2021-07-13 20:15:06,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:06,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35213554] [2021-07-13 20:15:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:07,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:07,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35213554] [2021-07-13 20:15:07,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35213554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:07,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873061203] [2021-07-13 20:15:07,251 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 [2021-07-13 20:15:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:07,283 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:15:07,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:07,649 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-07-13 20:15:08,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:08,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:08,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:08,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:08,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:08,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:08,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:15:08,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:08,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:08,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:08,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:15:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:08,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873061203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:08,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:08,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:15:08,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055868518] [2021-07-13 20:15:08,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:08,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:08,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:08,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:08,374 INFO L87 Difference]: Start difference. First operand 1668 states and 3390 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:10,110 INFO L93 Difference]: Finished difference Result 1815 states and 3656 transitions. [2021-07-13 20:15:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:15:10,111 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:10,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:10,113 INFO L225 Difference]: With dead ends: 1815 [2021-07-13 20:15:10,113 INFO L226 Difference]: Without dead ends: 1751 [2021-07-13 20:15:10,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 2106.1ms TimeCoverageRelationStatistics Valid=225, Invalid=2855, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:15:10,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2021-07-13 20:15:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1669. [2021-07-13 20:15:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 2.0335731414868103) internal successors, (3392), 1668 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 3392 transitions. [2021-07-13 20:15:10,137 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 3392 transitions. Word has length 40 [2021-07-13 20:15:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:10,137 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 3392 transitions. [2021-07-13 20:15:10,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 3392 transitions. [2021-07-13 20:15:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:10,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:10,138 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:10,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:10,339 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:10,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:10,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1309915603, now seen corresponding path program 182 times [2021-07-13 20:15:10,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:10,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050581830] [2021-07-13 20:15:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:10,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:10,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050581830] [2021-07-13 20:15:10,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050581830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:10,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865203616] [2021-07-13 20:15:10,783 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 [2021-07-13 20:15:10,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:10,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:10,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:15:10,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:11,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:11,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:11,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:15:11,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:11,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:11,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:15:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:11,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865203616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:11,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:11,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:15:11,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540356227] [2021-07-13 20:15:11,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:11,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:11,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:11,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:11,452 INFO L87 Difference]: Start difference. First operand 1669 states and 3392 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:13,319 INFO L93 Difference]: Finished difference Result 1847 states and 3724 transitions. [2021-07-13 20:15:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:15:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:13,321 INFO L225 Difference]: With dead ends: 1847 [2021-07-13 20:15:13,321 INFO L226 Difference]: Without dead ends: 1783 [2021-07-13 20:15:13,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1669.7ms TimeCoverageRelationStatistics Valid=237, Invalid=3069, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:15:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-07-13 20:15:13,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1673. [2021-07-13 20:15:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 2.0334928229665072) internal successors, (3400), 1672 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 3400 transitions. [2021-07-13 20:15:13,335 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 3400 transitions. Word has length 40 [2021-07-13 20:15:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:13,335 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 3400 transitions. [2021-07-13 20:15:13,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 3400 transitions. [2021-07-13 20:15:13,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:13,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:13,337 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:13,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:13,538 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:13,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:13,538 INFO L82 PathProgramCache]: Analyzing trace with hash 638350997, now seen corresponding path program 183 times [2021-07-13 20:15:13,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:13,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606455301] [2021-07-13 20:15:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:13,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:13,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606455301] [2021-07-13 20:15:13,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606455301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648144022] [2021-07-13 20:15:13,996 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 [2021-07-13 20:15:14,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:15:14,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:14,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:15:14,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:14,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:14,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:14,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:14,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:14,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:15:14,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:14,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:14,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:14,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:15:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:14,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648144022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:14,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:14,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:15:14,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777907923] [2021-07-13 20:15:14,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:14,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:14,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:14,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:14,662 INFO L87 Difference]: Start difference. First operand 1673 states and 3400 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:16,273 INFO L93 Difference]: Finished difference Result 1877 states and 3788 transitions. [2021-07-13 20:15:16,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:15:16,273 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:16,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:16,275 INFO L225 Difference]: With dead ends: 1877 [2021-07-13 20:15:16,275 INFO L226 Difference]: Without dead ends: 1829 [2021-07-13 20:15:16,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1598.8ms TimeCoverageRelationStatistics Valid=246, Invalid=3060, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:15:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-07-13 20:15:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1674. [2021-07-13 20:15:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.0334728033472804) internal successors, (3402), 1673 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 3402 transitions. [2021-07-13 20:15:16,290 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 3402 transitions. Word has length 40 [2021-07-13 20:15:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:16,290 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 3402 transitions. [2021-07-13 20:15:16,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 3402 transitions. [2021-07-13 20:15:16,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:16,292 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:16,292 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:16,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-07-13 20:15:16,492 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2023973587, now seen corresponding path program 184 times [2021-07-13 20:15:16,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:16,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797019432] [2021-07-13 20:15:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:16,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:16,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797019432] [2021-07-13 20:15:16,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797019432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:16,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420966158] [2021-07-13 20:15:16,926 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 [2021-07-13 20:15:16,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:16,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:16,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:15:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:17,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:17,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:17,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:15:17,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:17,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:17,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:17,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:15:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:17,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420966158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:17,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:17,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:15:17,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537945202] [2021-07-13 20:15:17,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:17,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:17,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:17,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:17,546 INFO L87 Difference]: Start difference. First operand 1674 states and 3402 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:19,648 INFO L93 Difference]: Finished difference Result 1931 states and 3899 transitions. [2021-07-13 20:15:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:15:19,648 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:19,651 INFO L225 Difference]: With dead ends: 1931 [2021-07-13 20:15:19,651 INFO L226 Difference]: Without dead ends: 1871 [2021-07-13 20:15:19,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1816.9ms TimeCoverageRelationStatistics Valid=287, Invalid=3619, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:15:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-07-13 20:15:19,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1681. [2021-07-13 20:15:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1680 states have (on average 2.033333333333333) internal successors, (3416), 1680 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 3416 transitions. [2021-07-13 20:15:19,672 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 3416 transitions. Word has length 40 [2021-07-13 20:15:19,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:19,672 INFO L482 AbstractCegarLoop]: Abstraction has 1681 states and 3416 transitions. [2021-07-13 20:15:19,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 3416 transitions. [2021-07-13 20:15:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:19,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:19,675 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:19,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:19,893 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:19,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:19,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1382862997, now seen corresponding path program 185 times [2021-07-13 20:15:19,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:19,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406375972] [2021-07-13 20:15:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:20,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:20,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406375972] [2021-07-13 20:15:20,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406375972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:20,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634177297] [2021-07-13 20:15:20,329 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 [2021-07-13 20:15:20,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:15:20,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:20,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:15:20,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:20,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:20,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:20,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:20,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:20,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:20,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-07-13 20:15:20,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:20,772 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-07-13 20:15:20,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:20,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:13 [2021-07-13 20:15:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:21,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634177297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:21,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:21,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-13 20:15:21,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753621425] [2021-07-13 20:15:21,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:15:21,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:21,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:15:21,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:15:21,008 INFO L87 Difference]: Start difference. First operand 1681 states and 3416 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:24,088 INFO L93 Difference]: Finished difference Result 2209 states and 4431 transitions. [2021-07-13 20:15:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:15:24,088 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:24,090 INFO L225 Difference]: With dead ends: 2209 [2021-07-13 20:15:24,090 INFO L226 Difference]: Without dead ends: 2124 [2021-07-13 20:15:24,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 2535.6ms TimeCoverageRelationStatistics Valid=513, Invalid=6293, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:15:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-07-13 20:15:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1708. [2021-07-13 20:15:24,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.0374926772114823) internal successors, (3478), 1707 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 3478 transitions. [2021-07-13 20:15:24,106 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 3478 transitions. Word has length 40 [2021-07-13 20:15:24,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:24,106 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 3478 transitions. [2021-07-13 20:15:24,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:24,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 3478 transitions. [2021-07-13 20:15:24,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:24,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:24,108 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:24,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-07-13 20:15:24,309 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:24,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1485861933, now seen corresponding path program 186 times [2021-07-13 20:15:24,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:24,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734253091] [2021-07-13 20:15:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:24,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:24,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734253091] [2021-07-13 20:15:24,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734253091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:24,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336372989] [2021-07-13 20:15:24,785 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 [2021-07-13 20:15:24,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:15:24,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:24,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:15:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:25,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:25,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:25,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:15:25,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:25,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:25,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:25,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:15:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:25,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336372989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:25,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:25,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:15:25,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436804736] [2021-07-13 20:15:25,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:25,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:25,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:25,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:25,538 INFO L87 Difference]: Start difference. First operand 1708 states and 3478 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:27,925 INFO L93 Difference]: Finished difference Result 2036 states and 4122 transitions. [2021-07-13 20:15:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:15:27,925 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:27,928 INFO L225 Difference]: With dead ends: 2036 [2021-07-13 20:15:27,928 INFO L226 Difference]: Without dead ends: 1992 [2021-07-13 20:15:27,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 2056.5ms TimeCoverageRelationStatistics Valid=348, Invalid=4344, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:15:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-07-13 20:15:27,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1703. [2021-07-13 20:15:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.0376028202115157) internal successors, (3468), 1702 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 3468 transitions. [2021-07-13 20:15:27,944 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 3468 transitions. Word has length 40 [2021-07-13 20:15:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:27,944 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 3468 transitions. [2021-07-13 20:15:27,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 3468 transitions. [2021-07-13 20:15:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:27,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:27,945 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:28,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:28,146 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:28,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1947693497, now seen corresponding path program 187 times [2021-07-13 20:15:28,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:28,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277016064] [2021-07-13 20:15:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:28,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:28,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277016064] [2021-07-13 20:15:28,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277016064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:28,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959352327] [2021-07-13 20:15:28,601 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 [2021-07-13 20:15:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:28,628 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:15:28,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:29,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:29,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:29,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:15:29,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:29,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:29,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:29,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-07-13 20:15:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:29,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959352327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:29,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:29,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:15:29,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924089261] [2021-07-13 20:15:29,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:29,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:29,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:29,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:29,291 INFO L87 Difference]: Start difference. First operand 1703 states and 3468 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:31,123 INFO L93 Difference]: Finished difference Result 1908 states and 3862 transitions. [2021-07-13 20:15:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:15:31,124 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:31,126 INFO L225 Difference]: With dead ends: 1908 [2021-07-13 20:15:31,126 INFO L226 Difference]: Without dead ends: 1880 [2021-07-13 20:15:31,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1705.8ms TimeCoverageRelationStatistics Valid=238, Invalid=3068, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:15:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-07-13 20:15:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1698. [2021-07-13 20:15:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.037713612256924) internal successors, (3458), 1697 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 3458 transitions. [2021-07-13 20:15:31,145 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 3458 transitions. Word has length 40 [2021-07-13 20:15:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:31,145 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 3458 transitions. [2021-07-13 20:15:31,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 3458 transitions. [2021-07-13 20:15:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:31,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:31,147 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:31,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:15:31,370 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:31,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:31,371 INFO L82 PathProgramCache]: Analyzing trace with hash -752658799, now seen corresponding path program 188 times [2021-07-13 20:15:31,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:31,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363903455] [2021-07-13 20:15:31,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:31,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:31,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363903455] [2021-07-13 20:15:31,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363903455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:31,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397876193] [2021-07-13 20:15:31,863 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 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 [2021-07-13 20:15:31,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:15:31,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:31,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:15:31,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:32,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:32,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:32,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:32,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:32,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:32,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:32,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:15:32,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:32,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:32,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:32,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:15:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:32,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397876193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:32,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:32,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:15:32,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856022679] [2021-07-13 20:15:32,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:32,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:32,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:32,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:32,692 INFO L87 Difference]: Start difference. First operand 1698 states and 3458 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:34,648 INFO L93 Difference]: Finished difference Result 1843 states and 3720 transitions. [2021-07-13 20:15:34,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:15:34,648 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:34,651 INFO L225 Difference]: With dead ends: 1843 [2021-07-13 20:15:34,651 INFO L226 Difference]: Without dead ends: 1779 [2021-07-13 20:15:34,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1858.3ms TimeCoverageRelationStatistics Valid=233, Invalid=2847, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:15:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2021-07-13 20:15:34,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1701. [2021-07-13 20:15:34,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 2.0376470588235294) internal successors, (3464), 1700 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 3464 transitions. [2021-07-13 20:15:34,671 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 3464 transitions. Word has length 40 [2021-07-13 20:15:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:34,671 INFO L482 AbstractCegarLoop]: Abstraction has 1701 states and 3464 transitions. [2021-07-13 20:15:34,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 3464 transitions. [2021-07-13 20:15:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:34,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:34,673 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:34,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-07-13 20:15:34,894 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:34,895 INFO L82 PathProgramCache]: Analyzing trace with hash -338824241, now seen corresponding path program 189 times [2021-07-13 20:15:34,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:34,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855136223] [2021-07-13 20:15:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:35,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:35,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855136223] [2021-07-13 20:15:35,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855136223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:35,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694217176] [2021-07-13 20:15:35,376 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 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 [2021-07-13 20:15:35,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:15:35,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:35,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:15:35,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:36,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:36,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:15:36,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:36,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:36,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:36,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:15:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:36,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694217176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:36,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:36,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-13 20:15:36,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273675734] [2021-07-13 20:15:36,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:15:36,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:36,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:15:36,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:15:36,200 INFO L87 Difference]: Start difference. First operand 1701 states and 3464 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:38,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:38,897 INFO L93 Difference]: Finished difference Result 1973 states and 3965 transitions. [2021-07-13 20:15:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:15:38,901 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:38,903 INFO L225 Difference]: With dead ends: 1973 [2021-07-13 20:15:38,904 INFO L226 Difference]: Without dead ends: 1853 [2021-07-13 20:15:38,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2622.5ms TimeCoverageRelationStatistics Valid=369, Invalid=4601, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:15:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-07-13 20:15:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1716. [2021-07-13 20:15:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 2.0379008746355685) internal successors, (3495), 1715 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 3495 transitions. [2021-07-13 20:15:38,920 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 3495 transitions. Word has length 40 [2021-07-13 20:15:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:38,920 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 3495 transitions. [2021-07-13 20:15:38,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 3495 transitions. [2021-07-13 20:15:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:38,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:38,922 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:39,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-13 20:15:39,146 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:39,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1010388847, now seen corresponding path program 190 times [2021-07-13 20:15:39,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:39,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880216992] [2021-07-13 20:15:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:39,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:39,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880216992] [2021-07-13 20:15:39,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880216992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:39,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756800309] [2021-07-13 20:15:39,646 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 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 [2021-07-13 20:15:39,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:15:39,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:39,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:15:39,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:40,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:40,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:40,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:15:40,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:40,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:40,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:40,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:15:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:40,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756800309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:40,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:40,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:15:40,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167584602] [2021-07-13 20:15:40,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:40,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:40,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:40,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:40,437 INFO L87 Difference]: Start difference. First operand 1716 states and 3495 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:43,342 INFO L93 Difference]: Finished difference Result 1993 states and 4005 transitions. [2021-07-13 20:15:43,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:15:43,342 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:43,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:43,345 INFO L225 Difference]: With dead ends: 1993 [2021-07-13 20:15:43,345 INFO L226 Difference]: Without dead ends: 1897 [2021-07-13 20:15:43,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2529.4ms TimeCoverageRelationStatistics Valid=392, Invalid=4438, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:15:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2021-07-13 20:15:43,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1717. [2021-07-13 20:15:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 2.037878787878788) internal successors, (3497), 1716 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3497 transitions. [2021-07-13 20:15:43,365 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3497 transitions. Word has length 40 [2021-07-13 20:15:43,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:43,366 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 3497 transitions. [2021-07-13 20:15:43,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:43,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3497 transitions. [2021-07-13 20:15:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:43,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:43,368 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:43,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-13 20:15:43,591 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:43,592 INFO L82 PathProgramCache]: Analyzing trace with hash 375233743, now seen corresponding path program 191 times [2021-07-13 20:15:43,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:43,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641876329] [2021-07-13 20:15:43,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:44,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:44,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641876329] [2021-07-13 20:15:44,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641876329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:44,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614602021] [2021-07-13 20:15:44,109 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 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 [2021-07-13 20:15:44,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:15:44,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:44,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:15:44,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:44,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:44,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:44,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:15:44,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:44,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:44,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:44,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:15:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:44,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614602021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:44,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:44,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:15:44,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257193570] [2021-07-13 20:15:44,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:44,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:44,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:44,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:44,883 INFO L87 Difference]: Start difference. First operand 1717 states and 3497 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:48,458 INFO L93 Difference]: Finished difference Result 2085 states and 4199 transitions. [2021-07-13 20:15:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:15:48,459 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:48,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:48,462 INFO L225 Difference]: With dead ends: 2085 [2021-07-13 20:15:48,462 INFO L226 Difference]: Without dead ends: 1993 [2021-07-13 20:15:48,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 2840.8ms TimeCoverageRelationStatistics Valid=443, Invalid=5107, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:15:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-07-13 20:15:48,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1729. [2021-07-13 20:15:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 2.0399305555555554) internal successors, (3525), 1728 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 3525 transitions. [2021-07-13 20:15:48,485 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 3525 transitions. Word has length 40 [2021-07-13 20:15:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:48,485 INFO L482 AbstractCegarLoop]: Abstraction has 1729 states and 3525 transitions. [2021-07-13 20:15:48,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 3525 transitions. [2021-07-13 20:15:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:48,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:48,488 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:48,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-13 20:15:48,693 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:48,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:48,693 INFO L82 PathProgramCache]: Analyzing trace with hash -265876847, now seen corresponding path program 192 times [2021-07-13 20:15:48,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:48,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668131196] [2021-07-13 20:15:48,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:49,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:49,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668131196] [2021-07-13 20:15:49,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668131196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:49,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414304736] [2021-07-13 20:15:49,232 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 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 [2021-07-13 20:15:49,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:15:49,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:15:49,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:15:49,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:49,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:49,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:49,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:49,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:49,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:15:49,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:49,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:49,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:49,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:15:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:49,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414304736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:49,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:49,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:15:49,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485497300] [2021-07-13 20:15:49,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:49,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:49,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:49,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:49,987 INFO L87 Difference]: Start difference. First operand 1729 states and 3525 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:53,522 INFO L93 Difference]: Finished difference Result 2102 states and 4236 transitions. [2021-07-13 20:15:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:15:53,523 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:53,525 INFO L225 Difference]: With dead ends: 2102 [2021-07-13 20:15:53,525 INFO L226 Difference]: Without dead ends: 2038 [2021-07-13 20:15:53,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 2786.9ms TimeCoverageRelationStatistics Valid=454, Invalid=4948, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:15:53,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-07-13 20:15:53,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1730. [2021-07-13 20:15:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.0399074609600927) internal successors, (3527), 1729 states have internal predecessors, (3527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 3527 transitions. [2021-07-13 20:15:53,546 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 3527 transitions. Word has length 40 [2021-07-13 20:15:53,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:53,546 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 3527 transitions. [2021-07-13 20:15:53,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:53,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 3527 transitions. [2021-07-13 20:15:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:53,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:53,549 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:53,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-07-13 20:15:53,773 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1160365519, now seen corresponding path program 193 times [2021-07-13 20:15:53,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:53,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602982990] [2021-07-13 20:15:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:54,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:15:54,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602982990] [2021-07-13 20:15:54,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602982990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:54,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258670415] [2021-07-13 20:15:54,278 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 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 [2021-07-13 20:15:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:15:54,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:15:54,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:15:54,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:15:54,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:15:54,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:15:54,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:15:54,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:15:54,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:15:54,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:15:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:15:55,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258670415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:15:55,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:15:55,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:15:55,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582780007] [2021-07-13 20:15:55,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:15:55,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:15:55,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:15:55,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:15:55,040 INFO L87 Difference]: Start difference. First operand 1730 states and 3527 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,381 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-13 20:15:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:15:59,585 INFO L93 Difference]: Finished difference Result 2190 states and 4414 transitions. [2021-07-13 20:15:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:15:59,585 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:15:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:15:59,588 INFO L225 Difference]: With dead ends: 2190 [2021-07-13 20:15:59,588 INFO L226 Difference]: Without dead ends: 2118 [2021-07-13 20:15:59,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 3501.5ms TimeCoverageRelationStatistics Valid=546, Invalid=6260, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:15:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-07-13 20:15:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1723. [2021-07-13 20:15:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 2.0394889663182347) internal successors, (3512), 1722 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 3512 transitions. [2021-07-13 20:15:59,606 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 3512 transitions. Word has length 40 [2021-07-13 20:15:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:15:59,607 INFO L482 AbstractCegarLoop]: Abstraction has 1723 states and 3512 transitions. [2021-07-13 20:15:59,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:15:59,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 3512 transitions. [2021-07-13 20:15:59,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:15:59,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:15:59,609 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:15:59,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-07-13 20:15:59,825 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:15:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:15:59,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1135469963, now seen corresponding path program 194 times [2021-07-13 20:15:59,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:15:59,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848866981] [2021-07-13 20:15:59,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:15:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:00,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:00,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848866981] [2021-07-13 20:16:00,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848866981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:00,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847080053] [2021-07-13 20:16:00,474 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 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 [2021-07-13 20:16:00,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:00,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:00,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:16:00,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:00,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:00,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:00,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:00,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:00,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:00,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:00,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-13 20:16:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:01,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847080053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:01,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:01,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:01,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907952611] [2021-07-13 20:16:01,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:01,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:01,235 INFO L87 Difference]: Start difference. First operand 1723 states and 3512 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:03,840 INFO L93 Difference]: Finished difference Result 1913 states and 3862 transitions. [2021-07-13 20:16:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:16:03,841 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:03,843 INFO L225 Difference]: With dead ends: 1913 [2021-07-13 20:16:03,843 INFO L226 Difference]: Without dead ends: 1857 [2021-07-13 20:16:03,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2447.9ms TimeCoverageRelationStatistics Valid=351, Invalid=4619, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:16:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-07-13 20:16:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1718. [2021-07-13 20:16:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 2.0396039603960396) internal successors, (3502), 1717 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 3502 transitions. [2021-07-13 20:16:03,872 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 3502 transitions. Word has length 40 [2021-07-13 20:16:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:03,872 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 3502 transitions. [2021-07-13 20:16:03,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 3502 transitions. [2021-07-13 20:16:03,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:03,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:03,874 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:04,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:04,075 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash -870248941, now seen corresponding path program 195 times [2021-07-13 20:16:04,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:04,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701614297] [2021-07-13 20:16:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:04,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:04,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701614297] [2021-07-13 20:16:04,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701614297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:04,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520158534] [2021-07-13 20:16:04,508 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 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 [2021-07-13 20:16:04,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:16:04,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:04,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:16:04,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:05,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:05,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:05,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:05,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:05,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:05,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:05,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:05,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:16:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:05,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520158534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:05,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:05,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-13 20:16:05,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044813058] [2021-07-13 20:16:05,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:16:05,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:05,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:16:05,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:16:05,165 INFO L87 Difference]: Start difference. First operand 1718 states and 3502 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:07,547 INFO L93 Difference]: Finished difference Result 1950 states and 3923 transitions. [2021-07-13 20:16:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:16:07,547 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:07,549 INFO L225 Difference]: With dead ends: 1950 [2021-07-13 20:16:07,549 INFO L226 Difference]: Without dead ends: 1830 [2021-07-13 20:16:07,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 2160.1ms TimeCoverageRelationStatistics Valid=346, Invalid=4624, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:16:07,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2021-07-13 20:16:07,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1741. [2021-07-13 20:16:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.039080459770115) internal successors, (3548), 1740 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:07,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 3548 transitions. [2021-07-13 20:16:07,565 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 3548 transitions. Word has length 40 [2021-07-13 20:16:07,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:07,565 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 3548 transitions. [2021-07-13 20:16:07,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:07,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 3548 transitions. [2021-07-13 20:16:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:07,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:07,567 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:07,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-13 20:16:07,767 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:07,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1541813547, now seen corresponding path program 196 times [2021-07-13 20:16:07,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:07,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737875369] [2021-07-13 20:16:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:08,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:08,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737875369] [2021-07-13 20:16:08,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737875369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:08,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769003065] [2021-07-13 20:16:08,157 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 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 [2021-07-13 20:16:08,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:08,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:08,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:16:08,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:08,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:08,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:08,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:08,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:08,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:08,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:08,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:08,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:08,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:08,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:08,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:16:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:08,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769003065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:08,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:08,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:08,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982906284] [2021-07-13 20:16:08,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:08,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:08,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:08,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:08,818 INFO L87 Difference]: Start difference. First operand 1741 states and 3548 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:11,275 INFO L93 Difference]: Finished difference Result 1953 states and 3933 transitions. [2021-07-13 20:16:11,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:16:11,275 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:11,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:11,277 INFO L225 Difference]: With dead ends: 1953 [2021-07-13 20:16:11,277 INFO L226 Difference]: Without dead ends: 1857 [2021-07-13 20:16:11,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 2185.4ms TimeCoverageRelationStatistics Valid=401, Invalid=4711, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:16:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2021-07-13 20:16:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1743. [2021-07-13 20:16:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1742 states have (on average 2.039035591274397) internal successors, (3552), 1742 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 3552 transitions. [2021-07-13 20:16:11,292 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 3552 transitions. Word has length 40 [2021-07-13 20:16:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:11,293 INFO L482 AbstractCegarLoop]: Abstraction has 1743 states and 3552 transitions. [2021-07-13 20:16:11,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 3552 transitions. [2021-07-13 20:16:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:11,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:11,294 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:11,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:11,495 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:11,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash -156190957, now seen corresponding path program 197 times [2021-07-13 20:16:11,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:11,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502535768] [2021-07-13 20:16:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:12,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:12,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502535768] [2021-07-13 20:16:12,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502535768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:12,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625050973] [2021-07-13 20:16:12,088 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 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 [2021-07-13 20:16:12,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:16:12,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:12,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:16:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:12,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:12,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:12,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:16:12,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:12,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:12,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:12,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:16:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:12,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625050973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:12,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:12,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:12,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632577854] [2021-07-13 20:16:12,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:12,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:12,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:12,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:12,722 INFO L87 Difference]: Start difference. First operand 1743 states and 3552 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:15,494 INFO L93 Difference]: Finished difference Result 2027 states and 4088 transitions. [2021-07-13 20:16:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:16:15,495 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:15,497 INFO L225 Difference]: With dead ends: 2027 [2021-07-13 20:16:15,497 INFO L226 Difference]: Without dead ends: 1939 [2021-07-13 20:16:15,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 2571.1ms TimeCoverageRelationStatistics Valid=435, Invalid=4967, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:16:15,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2021-07-13 20:16:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1748. [2021-07-13 20:16:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 2.0394962793360047) internal successors, (3563), 1747 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 3563 transitions. [2021-07-13 20:16:15,517 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 3563 transitions. Word has length 40 [2021-07-13 20:16:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:15,517 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 3563 transitions. [2021-07-13 20:16:15,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 3563 transitions. [2021-07-13 20:16:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:15,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:15,519 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:15,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:15,743 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:15,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:15,743 INFO L82 PathProgramCache]: Analyzing trace with hash -797301547, now seen corresponding path program 198 times [2021-07-13 20:16:15,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:15,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874593701] [2021-07-13 20:16:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:16,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:16,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874593701] [2021-07-13 20:16:16,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874593701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:16,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265101186] [2021-07-13 20:16:16,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:16:16,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:16:16,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:16,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:16:16,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:16,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:16,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:16,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:16,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:16,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:16,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:16,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:16:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:16,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265101186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:16,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:16,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:16,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655493688] [2021-07-13 20:16:16,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:16,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:16,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:16,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:16,965 INFO L87 Difference]: Start difference. First operand 1748 states and 3563 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:20,267 INFO L93 Difference]: Finished difference Result 2061 states and 4160 transitions. [2021-07-13 20:16:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:16:20,268 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:20,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:20,271 INFO L225 Difference]: With dead ends: 2061 [2021-07-13 20:16:20,271 INFO L226 Difference]: Without dead ends: 1997 [2021-07-13 20:16:20,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 2852.6ms TimeCoverageRelationStatistics Valid=502, Invalid=5350, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:16:20,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-07-13 20:16:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1749. [2021-07-13 20:16:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 2.039473684210526) internal successors, (3565), 1748 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 3565 transitions. [2021-07-13 20:16:20,293 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 3565 transitions. Word has length 40 [2021-07-13 20:16:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:20,293 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 3565 transitions. [2021-07-13 20:16:20,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 3565 transitions. [2021-07-13 20:16:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:20,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:20,295 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:20,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:20,519 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:20,520 INFO L82 PathProgramCache]: Analyzing trace with hash 628940819, now seen corresponding path program 199 times [2021-07-13 20:16:20,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:20,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95030051] [2021-07-13 20:16:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:21,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:21,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95030051] [2021-07-13 20:16:21,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95030051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:21,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364565341] [2021-07-13 20:16:21,030 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 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 [2021-07-13 20:16:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:21,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:16:21,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:21,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:21,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:21,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:21,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:21,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:21,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:21,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:16:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:21,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364565341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:21,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:21,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:21,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344740058] [2021-07-13 20:16:21,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:21,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:21,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:21,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:21,772 INFO L87 Difference]: Start difference. First operand 1749 states and 3565 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:26,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:26,688 INFO L93 Difference]: Finished difference Result 2161 states and 4359 transitions. [2021-07-13 20:16:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:16:26,689 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:26,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:26,692 INFO L225 Difference]: With dead ends: 2161 [2021-07-13 20:16:26,692 INFO L226 Difference]: Without dead ends: 2089 [2021-07-13 20:16:26,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 3467.4ms TimeCoverageRelationStatistics Valid=638, Invalid=7372, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:16:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-07-13 20:16:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1743. [2021-07-13 20:16:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1742 states have (on average 2.039035591274397) internal successors, (3552), 1742 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 3552 transitions. [2021-07-13 20:16:26,734 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 3552 transitions. Word has length 40 [2021-07-13 20:16:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:26,734 INFO L482 AbstractCegarLoop]: Abstraction has 1743 states and 3552 transitions. [2021-07-13 20:16:26,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 3552 transitions. [2021-07-13 20:16:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:26,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:26,736 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:26,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-07-13 20:16:26,960 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1786686753, now seen corresponding path program 200 times [2021-07-13 20:16:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:26,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422916323] [2021-07-13 20:16:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:27,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:27,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422916323] [2021-07-13 20:16:27,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422916323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:27,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22491597] [2021-07-13 20:16:27,590 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 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 [2021-07-13 20:16:27,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:27,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:27,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:16:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:28,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:28,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:28,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:28,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:28,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:28,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:28,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:28,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:28,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:28,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:28,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-13 20:16:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:28,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22491597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:28,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:28,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:28,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350725968] [2021-07-13 20:16:28,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:28,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:28,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:28,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:28,331 INFO L87 Difference]: Start difference. First operand 1743 states and 3552 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:30,707 INFO L93 Difference]: Finished difference Result 1931 states and 3897 transitions. [2021-07-13 20:16:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:16:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:30,709 INFO L225 Difference]: With dead ends: 1931 [2021-07-13 20:16:30,709 INFO L226 Difference]: Without dead ends: 1875 [2021-07-13 20:16:30,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2380.1ms TimeCoverageRelationStatistics Valid=353, Invalid=4759, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:16:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-07-13 20:16:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1741. [2021-07-13 20:16:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.039080459770115) internal successors, (3548), 1740 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 3548 transitions. [2021-07-13 20:16:30,723 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 3548 transitions. Word has length 40 [2021-07-13 20:16:30,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:30,724 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 3548 transitions. [2021-07-13 20:16:30,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 3548 transitions. [2021-07-13 20:16:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:30,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:30,725 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:30,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:30,926 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:30,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:30,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1409244241, now seen corresponding path program 201 times [2021-07-13 20:16:30,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:30,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365343704] [2021-07-13 20:16:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:31,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:31,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365343704] [2021-07-13 20:16:31,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365343704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:31,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19110224] [2021-07-13 20:16:31,320 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 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 [2021-07-13 20:16:31,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:16:31,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:31,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:16:31,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:31,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:31,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:31,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:31,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:31,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:31,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:16:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:31,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19110224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:31,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:31,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:31,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849286501] [2021-07-13 20:16:31,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:31,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:31,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:31,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:31,920 INFO L87 Difference]: Start difference. First operand 1741 states and 3548 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:33,679 INFO L93 Difference]: Finished difference Result 1883 states and 3808 transitions. [2021-07-13 20:16:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:16:33,679 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:33,681 INFO L225 Difference]: With dead ends: 1883 [2021-07-13 20:16:33,681 INFO L226 Difference]: Without dead ends: 1835 [2021-07-13 20:16:33,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1592.8ms TimeCoverageRelationStatistics Valid=276, Invalid=3264, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:16:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2021-07-13 20:16:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1744. [2021-07-13 20:16:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.0390131956397015) internal successors, (3554), 1743 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 3554 transitions. [2021-07-13 20:16:33,695 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 3554 transitions. Word has length 40 [2021-07-13 20:16:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:33,695 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 3554 transitions. [2021-07-13 20:16:33,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 3554 transitions. [2021-07-13 20:16:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:33,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:33,697 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:33,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-13 20:16:33,897 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:33,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:33,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1500100465, now seen corresponding path program 202 times [2021-07-13 20:16:33,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:33,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758071538] [2021-07-13 20:16:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:34,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:34,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758071538] [2021-07-13 20:16:34,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758071538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:34,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824432639] [2021-07-13 20:16:34,295 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 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 [2021-07-13 20:16:34,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:34,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:34,321 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:16:34,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:34,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:34,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:34,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:34,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:34,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:34,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:34,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:34,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:34,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:34,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:16:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:34,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824432639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:34,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:34,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:34,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722745994] [2021-07-13 20:16:34,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:34,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:34,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:34,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:34,878 INFO L87 Difference]: Start difference. First operand 1744 states and 3554 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:36,517 INFO L93 Difference]: Finished difference Result 1916 states and 3877 transitions. [2021-07-13 20:16:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:16:36,517 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:36,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:36,519 INFO L225 Difference]: With dead ends: 1916 [2021-07-13 20:16:36,519 INFO L226 Difference]: Without dead ends: 1872 [2021-07-13 20:16:36,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1620.0ms TimeCoverageRelationStatistics Valid=290, Invalid=3370, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:16:36,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-07-13 20:16:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1747. [2021-07-13 20:16:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 2.0389461626575027) internal successors, (3560), 1746 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 3560 transitions. [2021-07-13 20:16:36,534 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 3560 transitions. Word has length 40 [2021-07-13 20:16:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:36,534 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 3560 transitions. [2021-07-13 20:16:36,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 3560 transitions. [2021-07-13 20:16:36,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:36,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:36,536 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:36,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-13 20:16:36,736 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:36,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2141211055, now seen corresponding path program 203 times [2021-07-13 20:16:36,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:36,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050282405] [2021-07-13 20:16:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:37,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:37,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050282405] [2021-07-13 20:16:37,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050282405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:37,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096001242] [2021-07-13 20:16:37,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:16:37,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:16:37,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:37,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:16:37,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:37,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:37,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:37,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:37,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:37,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:37,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:16:37,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:37,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:37,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:37,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:16:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:37,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096001242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:37,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:37,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-07-13 20:16:37,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688848882] [2021-07-13 20:16:37,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:16:37,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:37,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:16:37,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1494, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:16:37,886 INFO L87 Difference]: Start difference. First operand 1747 states and 3560 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:39,711 INFO L93 Difference]: Finished difference Result 1926 states and 3897 transitions. [2021-07-13 20:16:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:16:39,711 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:39,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:39,714 INFO L225 Difference]: With dead ends: 1926 [2021-07-13 20:16:39,714 INFO L226 Difference]: Without dead ends: 1894 [2021-07-13 20:16:39,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1870.2ms TimeCoverageRelationStatistics Valid=379, Invalid=4313, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:16:39,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-07-13 20:16:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1748. [2021-07-13 20:16:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 2.038923869490555) internal successors, (3562), 1747 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 3562 transitions. [2021-07-13 20:16:39,737 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 3562 transitions. Word has length 40 [2021-07-13 20:16:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:39,738 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 3562 transitions. [2021-07-13 20:16:39,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 3562 transitions. [2021-07-13 20:16:39,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:39,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:39,739 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:39,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:39,940 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:39,940 INFO L82 PathProgramCache]: Analyzing trace with hash -714968689, now seen corresponding path program 204 times [2021-07-13 20:16:39,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:39,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584888881] [2021-07-13 20:16:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:40,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:40,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584888881] [2021-07-13 20:16:40,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584888881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:40,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921136003] [2021-07-13 20:16:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:16:40,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:16:40,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:40,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:16:40,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:40,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:40,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:40,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:40,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:40,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:40,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:16:40,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:40,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:40,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:40,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:16:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:40,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921136003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:40,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:40,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:40,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901419211] [2021-07-13 20:16:40,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:40,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:40,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:40,886 INFO L87 Difference]: Start difference. First operand 1748 states and 3562 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:43,244 INFO L93 Difference]: Finished difference Result 1992 states and 4026 transitions. [2021-07-13 20:16:43,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:16:43,244 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:43,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:43,246 INFO L225 Difference]: With dead ends: 1992 [2021-07-13 20:16:43,246 INFO L226 Difference]: Without dead ends: 1936 [2021-07-13 20:16:43,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 2034.1ms TimeCoverageRelationStatistics Valid=465, Invalid=5085, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:16:43,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-07-13 20:16:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1750. [2021-07-13 20:16:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 2.03830760434534) internal successors, (3565), 1749 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 3565 transitions. [2021-07-13 20:16:43,261 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 3565 transitions. Word has length 40 [2021-07-13 20:16:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:43,261 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 3565 transitions. [2021-07-13 20:16:43,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 3565 transitions. [2021-07-13 20:16:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:43,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:43,263 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:43,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-07-13 20:16:43,463 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:43,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1629601435, now seen corresponding path program 205 times [2021-07-13 20:16:43,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:43,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216711020] [2021-07-13 20:16:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:43,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:43,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216711020] [2021-07-13 20:16:43,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216711020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:43,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101693318] [2021-07-13 20:16:43,855 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 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 [2021-07-13 20:16:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:43,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:16:43,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:44,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:44,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:44,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:44,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:44,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:44,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:44,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:44,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:44,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-07-13 20:16:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:44,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101693318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:44,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:44,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:44,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157885102] [2021-07-13 20:16:44,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:44,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:44,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:44,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:44,436 INFO L87 Difference]: Start difference. First operand 1750 states and 3565 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:46,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:46,404 INFO L93 Difference]: Finished difference Result 1906 states and 3854 transitions. [2021-07-13 20:16:46,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:16:46,404 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:46,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:46,406 INFO L225 Difference]: With dead ends: 1906 [2021-07-13 20:16:46,406 INFO L226 Difference]: Without dead ends: 1878 [2021-07-13 20:16:46,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1725.1ms TimeCoverageRelationStatistics Valid=318, Invalid=3972, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:16:46,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-07-13 20:16:46,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1741. [2021-07-13 20:16:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.039080459770115) internal successors, (3548), 1740 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 3548 transitions. [2021-07-13 20:16:46,422 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 3548 transitions. Word has length 40 [2021-07-13 20:16:46,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:46,422 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 3548 transitions. [2021-07-13 20:16:46,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 3548 transitions. [2021-07-13 20:16:46,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:46,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:46,424 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:46,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-13 20:16:46,624 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:46,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1162379203, now seen corresponding path program 206 times [2021-07-13 20:16:46,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:46,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771221883] [2021-07-13 20:16:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:47,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:47,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771221883] [2021-07-13 20:16:47,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771221883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:47,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722149319] [2021-07-13 20:16:47,015 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 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 [2021-07-13 20:16:47,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:16:47,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:47,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:16:47,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:47,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:47,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:47,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:47,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:47,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:47,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:47,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:47,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:47,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:16:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:47,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722149319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:47,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:47,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:47,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636690021] [2021-07-13 20:16:47,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:47,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:47,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:47,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:47,633 INFO L87 Difference]: Start difference. First operand 1741 states and 3548 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:49,124 INFO L93 Difference]: Finished difference Result 1890 states and 3818 transitions. [2021-07-13 20:16:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:16:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:49,126 INFO L225 Difference]: With dead ends: 1890 [2021-07-13 20:16:49,126 INFO L226 Difference]: Without dead ends: 1826 [2021-07-13 20:16:49,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1437.3ms TimeCoverageRelationStatistics Valid=227, Invalid=2853, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:16:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2021-07-13 20:16:49,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1745. [2021-07-13 20:16:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 2.0389908256880735) internal successors, (3556), 1744 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 3556 transitions. [2021-07-13 20:16:49,141 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 3556 transitions. Word has length 40 [2021-07-13 20:16:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:49,141 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 3556 transitions. [2021-07-13 20:16:49,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 3556 transitions. [2021-07-13 20:16:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:49,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:49,143 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:49,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:49,343 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1576213761, now seen corresponding path program 207 times [2021-07-13 20:16:49,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:49,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973704496] [2021-07-13 20:16:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:49,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:49,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973704496] [2021-07-13 20:16:49,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973704496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:49,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934379357] [2021-07-13 20:16:49,726 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 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 [2021-07-13 20:16:49,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:16:49,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:49,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:16:49,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:50,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:50,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:50,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:50,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:50,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:50,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:50,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:50,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:50,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:16:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:50,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934379357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:50,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:50,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-13 20:16:50,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694623196] [2021-07-13 20:16:50,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:16:50,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:50,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:16:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1296, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:16:50,355 INFO L87 Difference]: Start difference. First operand 1745 states and 3556 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:52,640 INFO L93 Difference]: Finished difference Result 2022 states and 4068 transitions. [2021-07-13 20:16:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:16:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:52,642 INFO L225 Difference]: With dead ends: 2022 [2021-07-13 20:16:52,642 INFO L226 Difference]: Without dead ends: 1902 [2021-07-13 20:16:52,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 2108.4ms TimeCoverageRelationStatistics Valid=378, Invalid=4878, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:16:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-07-13 20:16:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1761. [2021-07-13 20:16:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.039772727272727) internal successors, (3590), 1760 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:52,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 3590 transitions. [2021-07-13 20:16:52,658 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 3590 transitions. Word has length 40 [2021-07-13 20:16:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:52,658 INFO L482 AbstractCegarLoop]: Abstraction has 1761 states and 3590 transitions. [2021-07-13 20:16:52,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 3590 transitions. [2021-07-13 20:16:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:52,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:52,660 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:52,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:52,860 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:52,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:52,860 INFO L82 PathProgramCache]: Analyzing trace with hash 904649155, now seen corresponding path program 208 times [2021-07-13 20:16:52,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:52,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717182532] [2021-07-13 20:16:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:53,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:53,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717182532] [2021-07-13 20:16:53,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717182532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:53,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545974068] [2021-07-13 20:16:53,241 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 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 [2021-07-13 20:16:53,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:16:53,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:53,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:16:53,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:53,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:53,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:53,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:53,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:53,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:16:53,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:53,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:53,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:53,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:16:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:53,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545974068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:53,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:53,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:53,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282125652] [2021-07-13 20:16:53,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:53,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:53,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:53,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:53,855 INFO L87 Difference]: Start difference. First operand 1761 states and 3590 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:16:56,582 INFO L93 Difference]: Finished difference Result 2042 states and 4108 transitions. [2021-07-13 20:16:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:16:56,583 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:16:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:16:56,585 INFO L225 Difference]: With dead ends: 2042 [2021-07-13 20:16:56,585 INFO L226 Difference]: Without dead ends: 1945 [2021-07-13 20:16:56,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2276.9ms TimeCoverageRelationStatistics Valid=452, Invalid=5248, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:16:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-07-13 20:16:56,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1762. [2021-07-13 20:16:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 2.0391822827938673) internal successors, (3591), 1761 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:56,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3591 transitions. [2021-07-13 20:16:56,600 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3591 transitions. Word has length 40 [2021-07-13 20:16:56,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:16:56,600 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 3591 transitions. [2021-07-13 20:16:56,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:16:56,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3591 transitions. [2021-07-13 20:16:56,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:16:56,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:16:56,602 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:16:56,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:16:56,802 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:16:56,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:16:56,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2004695551, now seen corresponding path program 209 times [2021-07-13 20:16:56,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:16:56,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053470014] [2021-07-13 20:16:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:16:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:16:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:57,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:16:57,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053470014] [2021-07-13 20:16:57,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053470014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:57,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656092025] [2021-07-13 20:16:57,192 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 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 [2021-07-13 20:16:57,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:16:57,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:16:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:16:57,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:16:57,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:57,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:57,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:57,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:16:57,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:16:57,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:16:57,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:16:57,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:16:57,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:16:57,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:16:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:16:57,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656092025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:16:57,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:16:57,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:16:57,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375797406] [2021-07-13 20:16:57,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:16:57,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:16:57,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:16:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:16:57,792 INFO L87 Difference]: Start difference. First operand 1762 states and 3591 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:00,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:00,967 INFO L93 Difference]: Finished difference Result 2140 states and 4313 transitions. [2021-07-13 20:17:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:17:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:00,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:00,970 INFO L225 Difference]: With dead ends: 2140 [2021-07-13 20:17:00,970 INFO L226 Difference]: Without dead ends: 2048 [2021-07-13 20:17:00,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 2525.7ms TimeCoverageRelationStatistics Valid=497, Invalid=5983, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:17:00,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-07-13 20:17:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1774. [2021-07-13 20:17:00,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 2.04117315284828) internal successors, (3619), 1773 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 3619 transitions. [2021-07-13 20:17:00,991 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 3619 transitions. Word has length 40 [2021-07-13 20:17:00,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:00,991 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 3619 transitions. [2021-07-13 20:17:00,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 3619 transitions. [2021-07-13 20:17:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:00,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:00,993 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:01,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:01,213 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:01,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:01,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1649161155, now seen corresponding path program 210 times [2021-07-13 20:17:01,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:01,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393951255] [2021-07-13 20:17:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:01,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:01,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393951255] [2021-07-13 20:17:01,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393951255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:01,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88540213] [2021-07-13 20:17:01,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:17:01,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:17:01,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:01,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:17:01,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:02,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:02,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:02,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:02,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:02,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:17:02,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:02,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:02,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:02,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:17:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:02,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88540213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:02,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:02,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:02,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907493908] [2021-07-13 20:17:02,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:02,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:02,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:02,451 INFO L87 Difference]: Start difference. First operand 1774 states and 3619 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:06,400 INFO L93 Difference]: Finished difference Result 2160 states and 4356 transitions. [2021-07-13 20:17:06,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:17:06,401 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:06,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:06,404 INFO L225 Difference]: With dead ends: 2160 [2021-07-13 20:17:06,404 INFO L226 Difference]: Without dead ends: 2096 [2021-07-13 20:17:06,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 3030.2ms TimeCoverageRelationStatistics Valid=511, Invalid=5809, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:17:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2021-07-13 20:17:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1775. [2021-07-13 20:17:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 2.0411499436302143) internal successors, (3621), 1774 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 3621 transitions. [2021-07-13 20:17:06,427 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 3621 transitions. Word has length 40 [2021-07-13 20:17:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:06,427 INFO L482 AbstractCegarLoop]: Abstraction has 1775 states and 3621 transitions. [2021-07-13 20:17:06,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 3621 transitions. [2021-07-13 20:17:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:06,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:06,429 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:06,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:06,653 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:06,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1219563775, now seen corresponding path program 211 times [2021-07-13 20:17:06,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:06,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882852368] [2021-07-13 20:17:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:07,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:07,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882852368] [2021-07-13 20:17:07,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882852368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:07,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349696560] [2021-07-13 20:17:07,144 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 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 [2021-07-13 20:17:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:07,180 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:17:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:07,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:07,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:07,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:07,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:07,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:17:07,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:07,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:07,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:07,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:17:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:07,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349696560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:07,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:07,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:07,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400007851] [2021-07-13 20:17:07,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:07,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:07,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:07,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:07,907 INFO L87 Difference]: Start difference. First operand 1775 states and 3621 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:12,375 INFO L93 Difference]: Finished difference Result 2253 states and 4543 transitions. [2021-07-13 20:17:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:17:12,375 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:12,378 INFO L225 Difference]: With dead ends: 2253 [2021-07-13 20:17:12,378 INFO L226 Difference]: Without dead ends: 2181 [2021-07-13 20:17:12,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2084 ImplicationChecksByTransitivity, 3407.9ms TimeCoverageRelationStatistics Valid=603, Invalid=7229, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:17:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-07-13 20:17:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1764. [2021-07-13 20:17:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 2.0385706182643224) internal successors, (3594), 1763 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 3594 transitions. [2021-07-13 20:17:12,399 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 3594 transitions. Word has length 40 [2021-07-13 20:17:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:12,399 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 3594 transitions. [2021-07-13 20:17:12,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 3594 transitions. [2021-07-13 20:17:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:12,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:12,402 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:12,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-13 20:17:12,625 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:12,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:12,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1244459331, now seen corresponding path program 212 times [2021-07-13 20:17:12,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:12,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585222511] [2021-07-13 20:17:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:13,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:13,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585222511] [2021-07-13 20:17:13,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585222511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:13,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246261330] [2021-07-13 20:17:13,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:17:13,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:17:13,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:13,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:17:13,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:13,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:13,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:13,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:13,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:13,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:17:13,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:13,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:13,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:13,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-13 20:17:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:13,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246261330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:13,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:13,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:13,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843892454] [2021-07-13 20:17:13,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:13,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:13,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:13,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:13,878 INFO L87 Difference]: Start difference. First operand 1764 states and 3594 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:16,228 INFO L93 Difference]: Finished difference Result 1963 states and 3963 transitions. [2021-07-13 20:17:16,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:17:16,228 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:16,230 INFO L225 Difference]: With dead ends: 1963 [2021-07-13 20:17:16,230 INFO L226 Difference]: Without dead ends: 1907 [2021-07-13 20:17:16,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 2235.0ms TimeCoverageRelationStatistics Valid=337, Invalid=4493, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:17:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-07-13 20:17:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1759. [2021-07-13 20:17:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 2.0386803185437996) internal successors, (3584), 1758 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 3584 transitions. [2021-07-13 20:17:16,246 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 3584 transitions. Word has length 40 [2021-07-13 20:17:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:16,246 INFO L482 AbstractCegarLoop]: Abstraction has 1759 states and 3584 transitions. [2021-07-13 20:17:16,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 3584 transitions. [2021-07-13 20:17:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:16,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:16,248 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:16,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-07-13 20:17:16,448 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:16,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:16,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1044789061, now seen corresponding path program 213 times [2021-07-13 20:17:16,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:16,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049601746] [2021-07-13 20:17:16,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:16,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:16,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049601746] [2021-07-13 20:17:16,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049601746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:16,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403408074] [2021-07-13 20:17:16,862 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 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 [2021-07-13 20:17:16,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:17:16,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:16,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:17:16,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:17,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:17,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:17,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:17,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:17,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:17:17,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:17,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:17,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:17,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:17:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:17,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403408074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:17,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:17,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-13 20:17:17,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453427599] [2021-07-13 20:17:17,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:17:17,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:17,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:17:17,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:17:17,510 INFO L87 Difference]: Start difference. First operand 1759 states and 3584 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:19,853 INFO L93 Difference]: Finished difference Result 1995 states and 4014 transitions. [2021-07-13 20:17:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:17:19,853 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:19,855 INFO L225 Difference]: With dead ends: 1995 [2021-07-13 20:17:19,855 INFO L226 Difference]: Without dead ends: 1875 [2021-07-13 20:17:19,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 2109.7ms TimeCoverageRelationStatistics Valid=349, Invalid=4763, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:17:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-07-13 20:17:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1780. [2021-07-13 20:17:19,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 2.038785834738617) internal successors, (3627), 1779 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3627 transitions. [2021-07-13 20:17:19,871 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3627 transitions. Word has length 40 [2021-07-13 20:17:19,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:19,871 INFO L482 AbstractCegarLoop]: Abstraction has 1780 states and 3627 transitions. [2021-07-13 20:17:19,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3627 transitions. [2021-07-13 20:17:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:19,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:19,872 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:20,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-13 20:17:20,073 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:20,073 INFO L82 PathProgramCache]: Analyzing trace with hash 373224455, now seen corresponding path program 214 times [2021-07-13 20:17:20,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:20,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269189094] [2021-07-13 20:17:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:20,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:20,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269189094] [2021-07-13 20:17:20,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269189094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:20,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247583639] [2021-07-13 20:17:20,462 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 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 [2021-07-13 20:17:20,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:17:20,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:20,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:17:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:20,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:20,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:20,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:20,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:20,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:17:20,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:20,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:20,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:20,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:17:21,076 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:21,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247583639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:21,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:21,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:21,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391872470] [2021-07-13 20:17:21,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:21,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:21,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:21,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:21,077 INFO L87 Difference]: Start difference. First operand 1780 states and 3627 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:23,671 INFO L93 Difference]: Finished difference Result 1992 states and 4011 transitions. [2021-07-13 20:17:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:17:23,671 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:23,674 INFO L225 Difference]: With dead ends: 1992 [2021-07-13 20:17:23,674 INFO L226 Difference]: Without dead ends: 1896 [2021-07-13 20:17:23,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 2294.0ms TimeCoverageRelationStatistics Valid=416, Invalid=5134, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:17:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-07-13 20:17:23,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1781. [2021-07-13 20:17:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1780 states have (on average 2.0382022471910113) internal successors, (3628), 1780 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 3628 transitions. [2021-07-13 20:17:23,690 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 3628 transitions. Word has length 40 [2021-07-13 20:17:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:23,690 INFO L482 AbstractCegarLoop]: Abstraction has 1781 states and 3628 transitions. [2021-07-13 20:17:23,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 3628 transitions. [2021-07-13 20:17:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:23,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:23,692 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:23,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-07-13 20:17:23,893 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:23,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:23,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1758847045, now seen corresponding path program 215 times [2021-07-13 20:17:23,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:23,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363031766] [2021-07-13 20:17:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:24,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:24,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363031766] [2021-07-13 20:17:24,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363031766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:24,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706753049] [2021-07-13 20:17:24,291 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 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 [2021-07-13 20:17:24,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:17:24,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:24,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:17:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:24,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:24,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:24,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:17:24,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:24,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:24,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:24,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:17:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:24,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706753049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:24,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:24,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:24,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081355836] [2021-07-13 20:17:24,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:24,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:24,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:24,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:24,908 INFO L87 Difference]: Start difference. First operand 1781 states and 3628 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:27,793 INFO L93 Difference]: Finished difference Result 2068 states and 4169 transitions. [2021-07-13 20:17:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:17:27,794 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:27,796 INFO L225 Difference]: With dead ends: 2068 [2021-07-13 20:17:27,796 INFO L226 Difference]: Without dead ends: 1980 [2021-07-13 20:17:27,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2385.5ms TimeCoverageRelationStatistics Valid=432, Invalid=5268, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:17:27,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-07-13 20:17:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1786. [2021-07-13 20:17:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 2.038655462184874) internal successors, (3639), 1785 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 3639 transitions. [2021-07-13 20:17:27,812 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 3639 transitions. Word has length 40 [2021-07-13 20:17:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:27,812 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 3639 transitions. [2021-07-13 20:17:27,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 3639 transitions. [2021-07-13 20:17:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:27,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:27,814 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:28,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-07-13 20:17:28,014 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:28,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:28,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1117736455, now seen corresponding path program 216 times [2021-07-13 20:17:28,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:28,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890570301] [2021-07-13 20:17:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:28,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:28,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890570301] [2021-07-13 20:17:28,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890570301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:28,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697987751] [2021-07-13 20:17:28,500 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 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 [2021-07-13 20:17:28,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:17:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:28,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:17:28,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:28,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:28,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:28,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:28,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:28,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:17:28,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:28,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:28,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:28,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:17:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:29,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697987751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:29,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:29,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:29,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244136337] [2021-07-13 20:17:29,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:29,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:29,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:29,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:29,135 INFO L87 Difference]: Start difference. First operand 1786 states and 3639 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:32,002 INFO L93 Difference]: Finished difference Result 2098 states and 4232 transitions. [2021-07-13 20:17:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:17:32,003 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:32,005 INFO L225 Difference]: With dead ends: 2098 [2021-07-13 20:17:32,005 INFO L226 Difference]: Without dead ends: 2034 [2021-07-13 20:17:32,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 2490.1ms TimeCoverageRelationStatistics Valid=496, Invalid=5666, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:17:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-07-13 20:17:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1787. [2021-07-13 20:17:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.038633818589026) internal successors, (3641), 1786 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 3641 transitions. [2021-07-13 20:17:32,033 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 3641 transitions. Word has length 40 [2021-07-13 20:17:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:32,033 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 3641 transitions. [2021-07-13 20:17:32,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 3641 transitions. [2021-07-13 20:17:32,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:32,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:32,035 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:32,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:32,236 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:32,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1750988475, now seen corresponding path program 217 times [2021-07-13 20:17:32,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:32,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461589619] [2021-07-13 20:17:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:32,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:32,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461589619] [2021-07-13 20:17:32,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461589619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:32,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983310375] [2021-07-13 20:17:32,625 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 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 [2021-07-13 20:17:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:32,652 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:17:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:33,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:33,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:33,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:17:33,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:33,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:33,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:33,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:17:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:33,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983310375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:33,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:33,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:33,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865917576] [2021-07-13 20:17:33,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:33,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:33,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:33,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:33,200 INFO L87 Difference]: Start difference. First operand 1787 states and 3641 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:36,817 INFO L93 Difference]: Finished difference Result 2196 states and 4427 transitions. [2021-07-13 20:17:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:17:36,818 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:36,820 INFO L225 Difference]: With dead ends: 2196 [2021-07-13 20:17:36,820 INFO L226 Difference]: Without dead ends: 2124 [2021-07-13 20:17:36,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 2766.6ms TimeCoverageRelationStatistics Valid=608, Invalid=7402, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:17:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-07-13 20:17:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1778. [2021-07-13 20:17:36,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 2.0382667416994935) internal successors, (3622), 1777 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 3622 transitions. [2021-07-13 20:17:36,836 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 3622 transitions. Word has length 40 [2021-07-13 20:17:36,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:36,836 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 3622 transitions. [2021-07-13 20:17:36,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:36,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 3622 transitions. [2021-07-13 20:17:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:36,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:36,838 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:37,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:37,038 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:37,039 INFO L82 PathProgramCache]: Analyzing trace with hash 128351249, now seen corresponding path program 218 times [2021-07-13 20:17:37,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:37,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558372488] [2021-07-13 20:17:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:37,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:37,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558372488] [2021-07-13 20:17:37,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558372488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:37,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343197859] [2021-07-13 20:17:37,433 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 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 [2021-07-13 20:17:37,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:17:37,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:37,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:17:37,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:37,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:37,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:37,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:17:37,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:37,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:37,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:37,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-13 20:17:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:38,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343197859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:38,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:38,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:38,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889165621] [2021-07-13 20:17:38,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:38,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:38,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:38,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:38,100 INFO L87 Difference]: Start difference. First operand 1778 states and 3622 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:40,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:40,170 INFO L93 Difference]: Finished difference Result 1974 states and 3983 transitions. [2021-07-13 20:17:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:17:40,171 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:40,173 INFO L225 Difference]: With dead ends: 1974 [2021-07-13 20:17:40,173 INFO L226 Difference]: Without dead ends: 1918 [2021-07-13 20:17:40,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1943.7ms TimeCoverageRelationStatistics Valid=337, Invalid=4493, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:17:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-07-13 20:17:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1771. [2021-07-13 20:17:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1770 states have (on average 2.0384180790960453) internal successors, (3608), 1770 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 3608 transitions. [2021-07-13 20:17:40,189 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 3608 transitions. Word has length 40 [2021-07-13 20:17:40,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:40,189 INFO L482 AbstractCegarLoop]: Abstraction has 1771 states and 3608 transitions. [2021-07-13 20:17:40,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 3608 transitions. [2021-07-13 20:17:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:40,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:40,191 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:40,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:40,391 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:40,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:40,391 INFO L82 PathProgramCache]: Analyzing trace with hash -970685053, now seen corresponding path program 219 times [2021-07-13 20:17:40,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:40,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337674998] [2021-07-13 20:17:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:40,813 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:40,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:40,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337674998] [2021-07-13 20:17:40,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337674998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:40,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492553062] [2021-07-13 20:17:40,813 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 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 [2021-07-13 20:17:40,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:17:40,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:40,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:17:40,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:41,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:41,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:41,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:41,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:41,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:17:41,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:41,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:41,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:41,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:17:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:41,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492553062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:41,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:41,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:41,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7354623] [2021-07-13 20:17:41,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:41,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:41,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:41,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:41,411 INFO L87 Difference]: Start difference. First operand 1771 states and 3608 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:43,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:43,678 INFO L93 Difference]: Finished difference Result 1994 states and 4013 transitions. [2021-07-13 20:17:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:17:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:43,681 INFO L225 Difference]: With dead ends: 1994 [2021-07-13 20:17:43,681 INFO L226 Difference]: Without dead ends: 1898 [2021-07-13 20:17:43,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1980.4ms TimeCoverageRelationStatistics Valid=346, Invalid=4346, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:17:43,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-07-13 20:17:43,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1781. [2021-07-13 20:17:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1780 states have (on average 2.0382022471910113) internal successors, (3628), 1780 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 3628 transitions. [2021-07-13 20:17:43,696 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 3628 transitions. Word has length 40 [2021-07-13 20:17:43,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:43,696 INFO L482 AbstractCegarLoop]: Abstraction has 1781 states and 3628 transitions. [2021-07-13 20:17:43,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 3628 transitions. [2021-07-13 20:17:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:43,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:43,698 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:43,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:43,899 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:43,899 INFO L82 PathProgramCache]: Analyzing trace with hash 414937537, now seen corresponding path program 220 times [2021-07-13 20:17:43,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:43,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240795625] [2021-07-13 20:17:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:44,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:44,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240795625] [2021-07-13 20:17:44,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240795625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:44,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869058071] [2021-07-13 20:17:44,296 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 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 [2021-07-13 20:17:44,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:17:44,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:44,321 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:17:44,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:44,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:44,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:44,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:44,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:44,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:44,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:44,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:17:44,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:44,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:44,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:44,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:17:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:44,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869058071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:44,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:44,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:44,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016897325] [2021-07-13 20:17:44,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:44,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:44,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:44,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:44,889 INFO L87 Difference]: Start difference. First operand 1781 states and 3628 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:47,212 INFO L93 Difference]: Finished difference Result 2038 states and 4107 transitions. [2021-07-13 20:17:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:17:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:47,214 INFO L225 Difference]: With dead ends: 2038 [2021-07-13 20:17:47,214 INFO L226 Difference]: Without dead ends: 1950 [2021-07-13 20:17:47,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2015.3ms TimeCoverageRelationStatistics Valid=365, Invalid=4465, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:17:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-07-13 20:17:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1784. [2021-07-13 20:17:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 2.0381379697139654) internal successors, (3634), 1783 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 3634 transitions. [2021-07-13 20:17:47,230 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 3634 transitions. Word has length 40 [2021-07-13 20:17:47,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:47,231 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 3634 transitions. [2021-07-13 20:17:47,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 3634 transitions. [2021-07-13 20:17:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:47,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:47,232 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:47,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:47,433 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash -226173053, now seen corresponding path program 221 times [2021-07-13 20:17:47,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:47,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289951625] [2021-07-13 20:17:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:47,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:47,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289951625] [2021-07-13 20:17:47,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289951625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:47,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564084095] [2021-07-13 20:17:47,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:17:47,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:17:47,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:47,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:17:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:48,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:48,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:48,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:48,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:48,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:17:48,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:48,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:48,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:48,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:17:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:48,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564084095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:48,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:48,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-13 20:17:48,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902811113] [2021-07-13 20:17:48,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:17:48,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:17:48,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:17:48,563 INFO L87 Difference]: Start difference. First operand 1784 states and 3634 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:50,927 INFO L93 Difference]: Finished difference Result 2044 states and 4120 transitions. [2021-07-13 20:17:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:17:50,928 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:50,930 INFO L225 Difference]: With dead ends: 2044 [2021-07-13 20:17:50,930 INFO L226 Difference]: Without dead ends: 1980 [2021-07-13 20:17:50,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 2243.8ms TimeCoverageRelationStatistics Valid=474, Invalid=5226, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:17:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-07-13 20:17:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1785. [2021-07-13 20:17:50,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 2.0381165919282513) internal successors, (3636), 1784 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 3636 transitions. [2021-07-13 20:17:50,946 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 3636 transitions. Word has length 40 [2021-07-13 20:17:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:50,946 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 3636 transitions. [2021-07-13 20:17:50,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 3636 transitions. [2021-07-13 20:17:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:50,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:50,948 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:51,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-13 20:17:51,149 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1200069313, now seen corresponding path program 222 times [2021-07-13 20:17:51,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:51,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66821417] [2021-07-13 20:17:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:51,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:51,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66821417] [2021-07-13 20:17:51,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66821417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:51,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559424164] [2021-07-13 20:17:51,651 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 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 [2021-07-13 20:17:51,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:17:51,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:17:51,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:17:51,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:52,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:52,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:52,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:52,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:52,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:52,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:17:52,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:52,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:52,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:52,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:17:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:52,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559424164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:52,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:52,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:52,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484209120] [2021-07-13 20:17:52,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:52,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:52,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:52,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:52,400 INFO L87 Difference]: Start difference. First operand 1785 states and 3636 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:56,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:17:56,294 INFO L93 Difference]: Finished difference Result 2151 states and 4329 transitions. [2021-07-13 20:17:56,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:17:56,295 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:17:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:17:56,298 INFO L225 Difference]: With dead ends: 2151 [2021-07-13 20:17:56,298 INFO L226 Difference]: Without dead ends: 2067 [2021-07-13 20:17:56,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 3210.7ms TimeCoverageRelationStatistics Valid=612, Invalid=6870, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:17:56,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2021-07-13 20:17:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1787. [2021-07-13 20:17:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 2.0375139977603585) internal successors, (3639), 1786 states have internal predecessors, (3639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 3639 transitions. [2021-07-13 20:17:56,322 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 3639 transitions. Word has length 40 [2021-07-13 20:17:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:17:56,322 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 3639 transitions. [2021-07-13 20:17:56,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:17:56,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 3639 transitions. [2021-07-13 20:17:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:17:56,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:17:56,324 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:17:56,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-13 20:17:56,533 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:17:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:17:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash 285436567, now seen corresponding path program 223 times [2021-07-13 20:17:56,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:17:56,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129892438] [2021-07-13 20:17:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:17:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:57,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:17:57,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129892438] [2021-07-13 20:17:57,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129892438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:57,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107480113] [2021-07-13 20:17:57,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:17:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:17:57,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:17:57,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:17:57,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:57,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:17:57,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:57,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:17:57,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:17:57,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:17:57,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:17:57,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:17:57,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-07-13 20:17:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:17:57,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107480113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:17:57,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:17:57,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:17:57,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178908058] [2021-07-13 20:17:57,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:17:57,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:17:57,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:17:57,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:17:57,736 INFO L87 Difference]: Start difference. First operand 1787 states and 3639 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:00,021 INFO L93 Difference]: Finished difference Result 1991 states and 4013 transitions. [2021-07-13 20:18:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:18:00,021 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:00,023 INFO L225 Difference]: With dead ends: 1991 [2021-07-13 20:18:00,023 INFO L226 Difference]: Without dead ends: 1935 [2021-07-13 20:18:00,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 2152.3ms TimeCoverageRelationStatistics Valid=379, Invalid=5023, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:18:00,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-07-13 20:18:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1780. [2021-07-13 20:18:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 2.038223721191681) internal successors, (3626), 1779 states have internal predecessors, (3626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3626 transitions. [2021-07-13 20:18:00,039 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3626 transitions. Word has length 40 [2021-07-13 20:18:00,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:00,039 INFO L482 AbstractCegarLoop]: Abstraction has 1780 states and 3626 transitions. [2021-07-13 20:18:00,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:00,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3626 transitions. [2021-07-13 20:18:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:00,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:00,041 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:00,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-07-13 20:18:00,242 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:00,242 INFO L82 PathProgramCache]: Analyzing trace with hash 573735085, now seen corresponding path program 224 times [2021-07-13 20:18:00,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:00,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300162362] [2021-07-13 20:18:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:00,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:00,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300162362] [2021-07-13 20:18:00,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300162362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:00,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859567553] [2021-07-13 20:18:00,680 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:00,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:00,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:00,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:18:00,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:01,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:01,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:01,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:01,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:01,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:01,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:01,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:18:01,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:01,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:01,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:01,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:18:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:01,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859567553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:01,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:01,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:01,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916054719] [2021-07-13 20:18:01,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:01,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:01,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:01,302 INFO L87 Difference]: Start difference. First operand 1780 states and 3626 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:04,364 INFO L93 Difference]: Finished difference Result 2047 states and 4123 transitions. [2021-07-13 20:18:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:18:04,365 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:04,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:04,367 INFO L225 Difference]: With dead ends: 2047 [2021-07-13 20:18:04,367 INFO L226 Difference]: Without dead ends: 1927 [2021-07-13 20:18:04,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 2637.6ms TimeCoverageRelationStatistics Valid=449, Invalid=6193, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:18:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2021-07-13 20:18:04,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1806. [2021-07-13 20:18:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 2.0398891966759) internal successors, (3682), 1805 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 3682 transitions. [2021-07-13 20:18:04,383 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 3682 transitions. Word has length 40 [2021-07-13 20:18:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:04,383 INFO L482 AbstractCegarLoop]: Abstraction has 1806 states and 3682 transitions. [2021-07-13 20:18:04,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 3682 transitions. [2021-07-13 20:18:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:04,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:04,384 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:04,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-13 20:18:04,585 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:04,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:04,585 INFO L82 PathProgramCache]: Analyzing trace with hash -97829521, now seen corresponding path program 225 times [2021-07-13 20:18:04,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:04,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48916251] [2021-07-13 20:18:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:05,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:05,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48916251] [2021-07-13 20:18:05,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48916251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:05,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391866350] [2021-07-13 20:18:05,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:05,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:18:05,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:05,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:18:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:05,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:05,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:18:05,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:05,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:05,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:05,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:18:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:05,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391866350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:05,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:05,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:05,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838542224] [2021-07-13 20:18:05,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:05,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:05,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:05,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:05,646 INFO L87 Difference]: Start difference. First operand 1806 states and 3682 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:08,960 INFO L93 Difference]: Finished difference Result 2042 states and 4116 transitions. [2021-07-13 20:18:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:18:08,961 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:08,963 INFO L225 Difference]: With dead ends: 2042 [2021-07-13 20:18:08,963 INFO L226 Difference]: Without dead ends: 1946 [2021-07-13 20:18:08,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 2666.7ms TimeCoverageRelationStatistics Valid=495, Invalid=6311, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:18:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-07-13 20:18:08,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1807. [2021-07-13 20:18:08,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 2.039313399778516) internal successors, (3683), 1806 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 3683 transitions. [2021-07-13 20:18:08,979 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 3683 transitions. Word has length 40 [2021-07-13 20:18:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:08,979 INFO L482 AbstractCegarLoop]: Abstraction has 1807 states and 3683 transitions. [2021-07-13 20:18:08,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 3683 transitions. [2021-07-13 20:18:08,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:08,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:08,981 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:09,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-07-13 20:18:09,181 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1287793069, now seen corresponding path program 226 times [2021-07-13 20:18:09,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:09,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995575093] [2021-07-13 20:18:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:09,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995575093] [2021-07-13 20:18:09,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995575093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122057943] [2021-07-13 20:18:09,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:09,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:09,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:09,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:18:09,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:10,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:10,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:10,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:10,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:10,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:10,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:10,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:18:10,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:10,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:10,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:10,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:18:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:10,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122057943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:10,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:10,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:10,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802034956] [2021-07-13 20:18:10,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:10,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:10,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:10,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:10,285 INFO L87 Difference]: Start difference. First operand 1807 states and 3683 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:14,524 INFO L93 Difference]: Finished difference Result 2095 states and 4226 transitions. [2021-07-13 20:18:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:18:14,524 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:14,527 INFO L225 Difference]: With dead ends: 2095 [2021-07-13 20:18:14,527 INFO L226 Difference]: Without dead ends: 2007 [2021-07-13 20:18:14,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 3338.1ms TimeCoverageRelationStatistics Valid=529, Invalid=6611, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:18:14,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-07-13 20:18:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1812. [2021-07-13 20:18:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 2.0381004969630037) internal successors, (3691), 1811 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3691 transitions. [2021-07-13 20:18:14,550 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3691 transitions. Word has length 40 [2021-07-13 20:18:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:14,550 INFO L482 AbstractCegarLoop]: Abstraction has 1812 states and 3691 transitions. [2021-07-13 20:18:14,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3691 transitions. [2021-07-13 20:18:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:14,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:14,552 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:14,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-07-13 20:18:14,769 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash 646682479, now seen corresponding path program 227 times [2021-07-13 20:18:14,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:14,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950250689] [2021-07-13 20:18:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:15,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:15,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950250689] [2021-07-13 20:18:15,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950250689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:15,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806960278] [2021-07-13 20:18:15,278 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:15,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:18:15,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:15,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:18:15,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:15,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:15,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:15,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:15,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:15,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:18:15,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:15,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:15,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:15,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:18:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:16,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806960278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:16,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:16,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:16,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911938638] [2021-07-13 20:18:16,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:16,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:16,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:16,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:16,014 INFO L87 Difference]: Start difference. First operand 1812 states and 3691 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:19,866 INFO L93 Difference]: Finished difference Result 2121 states and 4280 transitions. [2021-07-13 20:18:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:18:19,866 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:19,869 INFO L225 Difference]: With dead ends: 2121 [2021-07-13 20:18:19,869 INFO L226 Difference]: Without dead ends: 2057 [2021-07-13 20:18:19,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 3113.9ms TimeCoverageRelationStatistics Valid=593, Invalid=6889, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:18:19,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-07-13 20:18:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1813. [2021-07-13 20:18:19,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.0380794701986753) internal successors, (3693), 1812 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 3693 transitions. [2021-07-13 20:18:19,885 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 3693 transitions. Word has length 40 [2021-07-13 20:18:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:19,886 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 3693 transitions. [2021-07-13 20:18:19,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 3693 transitions. [2021-07-13 20:18:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:19,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:19,887 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:20,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:20,088 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:20,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2072924845, now seen corresponding path program 228 times [2021-07-13 20:18:20,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:20,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7604002] [2021-07-13 20:18:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:20,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:20,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7604002] [2021-07-13 20:18:20,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7604002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:20,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108937015] [2021-07-13 20:18:20,481 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:20,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:18:20,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:20,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:18:20,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:20,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:20,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:20,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-07-13 20:18:20,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:20,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:20,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:20,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:25 [2021-07-13 20:18:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:21,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108937015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:21,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:21,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-07-13 20:18:21,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250710586] [2021-07-13 20:18:21,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-13 20:18:21,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:21,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-13 20:18:21,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:18:21,265 INFO L87 Difference]: Start difference. First operand 1813 states and 3693 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:26,113 INFO L93 Difference]: Finished difference Result 2222 states and 4477 transitions. [2021-07-13 20:18:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:18:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:26,116 INFO L225 Difference]: With dead ends: 2222 [2021-07-13 20:18:26,116 INFO L226 Difference]: Without dead ends: 2148 [2021-07-13 20:18:26,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 3600.1ms TimeCoverageRelationStatistics Valid=706, Invalid=9194, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:18:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2021-07-13 20:18:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 1812. [2021-07-13 20:18:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 2.0392048591938154) internal successors, (3693), 1811 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3693 transitions. [2021-07-13 20:18:26,138 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3693 transitions. Word has length 40 [2021-07-13 20:18:26,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:26,139 INFO L482 AbstractCegarLoop]: Abstraction has 1812 states and 3693 transitions. [2021-07-13 20:18:26,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3693 transitions. [2021-07-13 20:18:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:26,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:26,141 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:26,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:26,353 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:26,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:26,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1022987885, now seen corresponding path program 229 times [2021-07-13 20:18:26,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:26,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587719111] [2021-07-13 20:18:26,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:26,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:26,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587719111] [2021-07-13 20:18:26,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587719111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:26,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807119474] [2021-07-13 20:18:26,780 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:26,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:18:26,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:27,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:27,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:27,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:27,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:27,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:27,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:27,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:18:27,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:27,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:27,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:27,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:18:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:27,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807119474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:27,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:27,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:27,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081017104] [2021-07-13 20:18:27,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:27,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:27,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:27,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:27,509 INFO L87 Difference]: Start difference. First operand 1812 states and 3693 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:30,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:30,231 INFO L93 Difference]: Finished difference Result 2007 states and 4046 transitions. [2021-07-13 20:18:30,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:18:30,231 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:30,234 INFO L225 Difference]: With dead ends: 2007 [2021-07-13 20:18:30,234 INFO L226 Difference]: Without dead ends: 1922 [2021-07-13 20:18:30,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 2410.8ms TimeCoverageRelationStatistics Valid=358, Invalid=4612, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:18:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-07-13 20:18:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1819. [2021-07-13 20:18:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.0374037403740375) internal successors, (3704), 1818 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 3704 transitions. [2021-07-13 20:18:30,272 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 3704 transitions. Word has length 40 [2021-07-13 20:18:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:30,272 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 3704 transitions. [2021-07-13 20:18:30,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 3704 transitions. [2021-07-13 20:18:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:30,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:30,275 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:30,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:30,499 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1664098475, now seen corresponding path program 230 times [2021-07-13 20:18:30,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:30,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692389951] [2021-07-13 20:18:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:30,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:30,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692389951] [2021-07-13 20:18:30,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692389951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:30,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727209228] [2021-07-13 20:18:30,952 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:30,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:30,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:30,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:18:30,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:31,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:31,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:31,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:31,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:31,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:31,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:31,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:18:31,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:31,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:31,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:31,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:18:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:31,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727209228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:31,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:31,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:31,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956915896] [2021-07-13 20:18:31,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:31,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:31,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:31,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:31,650 INFO L87 Difference]: Start difference. First operand 1819 states and 3704 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:33,923 INFO L93 Difference]: Finished difference Result 2009 states and 4052 transitions. [2021-07-13 20:18:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:18:33,924 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:33,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:33,926 INFO L225 Difference]: With dead ends: 2009 [2021-07-13 20:18:33,926 INFO L226 Difference]: Without dead ends: 1948 [2021-07-13 20:18:33,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2160.3ms TimeCoverageRelationStatistics Valid=411, Invalid=4701, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:18:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-07-13 20:18:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1813. [2021-07-13 20:18:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.0375275938189845) internal successors, (3692), 1812 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 3692 transitions. [2021-07-13 20:18:33,941 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 3692 transitions. Word has length 40 [2021-07-13 20:18:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:33,941 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 3692 transitions. [2021-07-13 20:18:33,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 3692 transitions. [2021-07-13 20:18:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:33,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:33,943 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:34,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-07-13 20:18:34,144 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:34,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:34,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1490840907, now seen corresponding path program 231 times [2021-07-13 20:18:34,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:34,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614187066] [2021-07-13 20:18:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:34,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:34,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614187066] [2021-07-13 20:18:34,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614187066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:34,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798434324] [2021-07-13 20:18:34,527 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:34,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:18:34,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:34,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:18:34,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:34,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:34,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:34,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:34,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:34,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:34,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:34,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:18:34,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:34,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:34,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:34,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-07-13 20:18:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:35,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798434324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:35,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:35,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:35,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292585977] [2021-07-13 20:18:35,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:35,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:35,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:35,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:35,109 INFO L87 Difference]: Start difference. First operand 1813 states and 3692 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:37,192 INFO L93 Difference]: Finished difference Result 2006 states and 4046 transitions. [2021-07-13 20:18:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:18:37,193 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:37,195 INFO L225 Difference]: With dead ends: 2006 [2021-07-13 20:18:37,195 INFO L226 Difference]: Without dead ends: 1945 [2021-07-13 20:18:37,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 1914.6ms TimeCoverageRelationStatistics Valid=374, Invalid=4738, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:18:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-07-13 20:18:37,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1808. [2021-07-13 20:18:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1807 states have (on average 2.0376314333148864) internal successors, (3682), 1807 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 3682 transitions. [2021-07-13 20:18:37,211 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 3682 transitions. Word has length 40 [2021-07-13 20:18:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:37,211 INFO L482 AbstractCegarLoop]: Abstraction has 1808 states and 3682 transitions. [2021-07-13 20:18:37,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 3682 transitions. [2021-07-13 20:18:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:37,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:37,213 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:37,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:37,416 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:37,416 INFO L82 PathProgramCache]: Analyzing trace with hash -342702727, now seen corresponding path program 232 times [2021-07-13 20:18:37,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:37,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917209808] [2021-07-13 20:18:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:37,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:37,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917209808] [2021-07-13 20:18:37,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917209808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:37,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990986349] [2021-07-13 20:18:37,815 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:37,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:37,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:37,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:18:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:38,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:38,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:38,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:18:38,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:38,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:38,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:38,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-07-13 20:18:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:38,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990986349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:38,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:38,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:38,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377968089] [2021-07-13 20:18:38,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:38,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:38,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:38,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:38,398 INFO L87 Difference]: Start difference. First operand 1808 states and 3682 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:40,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:40,625 INFO L93 Difference]: Finished difference Result 1999 states and 4032 transitions. [2021-07-13 20:18:40,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:18:40,625 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:40,628 INFO L225 Difference]: With dead ends: 1999 [2021-07-13 20:18:40,628 INFO L226 Difference]: Without dead ends: 1943 [2021-07-13 20:18:40,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 2024.7ms TimeCoverageRelationStatistics Valid=373, Invalid=5029, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:18:40,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-07-13 20:18:40,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1804. [2021-07-13 20:18:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 2.0377149195784803) internal successors, (3674), 1803 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 3674 transitions. [2021-07-13 20:18:40,643 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 3674 transitions. Word has length 40 [2021-07-13 20:18:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:40,644 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 3674 transitions. [2021-07-13 20:18:40,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 3674 transitions. [2021-07-13 20:18:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:40,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:40,645 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:40,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-07-13 20:18:40,846 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:40,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:40,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1441739029, now seen corresponding path program 233 times [2021-07-13 20:18:40,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:40,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955628172] [2021-07-13 20:18:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:41,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:41,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955628172] [2021-07-13 20:18:41,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955628172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:41,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45356288] [2021-07-13 20:18:41,238 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:41,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:18:41,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:41,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:18:41,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:41,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:41,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:41,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:41,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:41,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:18:41,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:41,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:41,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:41,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:18:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:41,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45356288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:41,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:41,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:41,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93709862] [2021-07-13 20:18:41,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:41,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:41,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:41,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:41,833 INFO L87 Difference]: Start difference. First operand 1804 states and 3674 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:44,696 INFO L93 Difference]: Finished difference Result 2056 states and 4142 transitions. [2021-07-13 20:18:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:18:44,697 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:44,699 INFO L225 Difference]: With dead ends: 2056 [2021-07-13 20:18:44,699 INFO L226 Difference]: Without dead ends: 1960 [2021-07-13 20:18:44,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 2242.3ms TimeCoverageRelationStatistics Valid=424, Invalid=5428, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:18:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-07-13 20:18:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1816. [2021-07-13 20:18:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 2.0391184573002756) internal successors, (3701), 1815 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:44,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 3701 transitions. [2021-07-13 20:18:44,714 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 3701 transitions. Word has length 40 [2021-07-13 20:18:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:44,714 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 3701 transitions. [2021-07-13 20:18:44,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 3701 transitions. [2021-07-13 20:18:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:44,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:44,716 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:44,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable279,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:44,916 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:44,916 INFO L82 PathProgramCache]: Analyzing trace with hash -56116439, now seen corresponding path program 234 times [2021-07-13 20:18:44,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:44,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7885589] [2021-07-13 20:18:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:45,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:45,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7885589] [2021-07-13 20:18:45,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7885589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:45,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162953228] [2021-07-13 20:18:45,315 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:45,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:18:45,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:45,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:18:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:45,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:45,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:45,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:18:45,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:45,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:45,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:45,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:18:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:45,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162953228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:45,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:45,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:45,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112756918] [2021-07-13 20:18:45,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:45,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:45,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:45,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:45,902 INFO L87 Difference]: Start difference. First operand 1816 states and 3701 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:49,385 INFO L93 Difference]: Finished difference Result 2078 states and 4190 transitions. [2021-07-13 20:18:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:18:49,385 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:49,388 INFO L225 Difference]: With dead ends: 2078 [2021-07-13 20:18:49,388 INFO L226 Difference]: Without dead ends: 1990 [2021-07-13 20:18:49,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2643.0ms TimeCoverageRelationStatistics Valid=449, Invalid=5557, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:18:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-07-13 20:18:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1819. [2021-07-13 20:18:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.0374037403740375) internal successors, (3704), 1818 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 3704 transitions. [2021-07-13 20:18:49,410 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 3704 transitions. Word has length 40 [2021-07-13 20:18:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:49,410 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 3704 transitions. [2021-07-13 20:18:49,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 3704 transitions. [2021-07-13 20:18:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:49,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:49,412 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:49,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:49,629 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash -697227029, now seen corresponding path program 235 times [2021-07-13 20:18:49,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:49,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104148345] [2021-07-13 20:18:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:50,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104148345] [2021-07-13 20:18:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104148345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920325479] [2021-07-13 20:18:50,179 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:50,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:18:50,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:50,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:50,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:50,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:50,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:50,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:50,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:18:50,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:50,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:50,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:50,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:18:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:50,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920325479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:50,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:50,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:50,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343137716] [2021-07-13 20:18:50,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:50,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:50,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:50,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:50,873 INFO L87 Difference]: Start difference. First operand 1819 states and 3704 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:54,295 INFO L93 Difference]: Finished difference Result 2083 states and 4199 transitions. [2021-07-13 20:18:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:18:54,295 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:54,297 INFO L225 Difference]: With dead ends: 2083 [2021-07-13 20:18:54,297 INFO L226 Difference]: Without dead ends: 2019 [2021-07-13 20:18:54,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2817.7ms TimeCoverageRelationStatistics Valid=540, Invalid=5940, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:18:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-07-13 20:18:54,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1820. [2021-07-13 20:18:54,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 2.0373831775700935) internal successors, (3706), 1819 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 3706 transitions. [2021-07-13 20:18:54,313 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 3706 transitions. Word has length 40 [2021-07-13 20:18:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:54,313 INFO L482 AbstractCegarLoop]: Abstraction has 1820 states and 3706 transitions. [2021-07-13 20:18:54,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 3706 transitions. [2021-07-13 20:18:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:54,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:54,315 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:54,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-07-13 20:18:54,516 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:54,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:54,516 INFO L82 PathProgramCache]: Analyzing trace with hash 729015337, now seen corresponding path program 236 times [2021-07-13 20:18:54,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:54,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205675496] [2021-07-13 20:18:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:54,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:54,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205675496] [2021-07-13 20:18:54,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205675496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:54,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759552254] [2021-07-13 20:18:54,914 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:54,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:54,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:54,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:18:54,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:55,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:55,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:55,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:18:55,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:18:55,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:18:55,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:55,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:55,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:18:55,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:18:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:55,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759552254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:55,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:55,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:18:55,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441869109] [2021-07-13 20:18:55,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:18:55,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:18:55,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:18:55,478 INFO L87 Difference]: Start difference. First operand 1820 states and 3706 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:59,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:59,391 INFO L93 Difference]: Finished difference Result 2198 states and 4421 transitions. [2021-07-13 20:18:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:18:59,391 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:18:59,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:59,393 INFO L225 Difference]: With dead ends: 2198 [2021-07-13 20:18:59,394 INFO L226 Difference]: Without dead ends: 2111 [2021-07-13 20:18:59,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 2911.8ms TimeCoverageRelationStatistics Valid=733, Invalid=8579, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 20:18:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-07-13 20:18:59,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1822. [2021-07-13 20:18:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 2.0367929708951125) internal successors, (3709), 1821 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 3709 transitions. [2021-07-13 20:18:59,410 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 3709 transitions. Word has length 40 [2021-07-13 20:18:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:59,410 INFO L482 AbstractCegarLoop]: Abstraction has 1822 states and 3709 transitions. [2021-07-13 20:18:59,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 3709 transitions. [2021-07-13 20:18:59,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:18:59,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:59,412 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:59,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:59,612 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:59,613 INFO L82 PathProgramCache]: Analyzing trace with hash -185617409, now seen corresponding path program 237 times [2021-07-13 20:18:59,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:59,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215481185] [2021-07-13 20:18:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:00,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:00,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215481185] [2021-07-13 20:19:00,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215481185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:00,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377730061] [2021-07-13 20:19:00,012 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:00,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:19:00,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:00,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:19:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:00,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:00,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:00,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:00,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:19:00,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:00,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:00,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:00,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-13 20:19:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:00,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377730061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:00,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:00,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:19:00,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496152496] [2021-07-13 20:19:00,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:19:00,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:00,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:19:00,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:00,545 INFO L87 Difference]: Start difference. First operand 1822 states and 3709 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:03,101 INFO L93 Difference]: Finished difference Result 2059 states and 4148 transitions. [2021-07-13 20:19:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:19:03,102 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:03,104 INFO L225 Difference]: With dead ends: 2059 [2021-07-13 20:19:03,104 INFO L226 Difference]: Without dead ends: 2000 [2021-07-13 20:19:03,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 2191.0ms TimeCoverageRelationStatistics Valid=476, Invalid=6166, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:19:03,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-07-13 20:19:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1810. [2021-07-13 20:19:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 2.0375898286346046) internal successors, (3686), 1809 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 3686 transitions. [2021-07-13 20:19:03,120 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 3686 transitions. Word has length 40 [2021-07-13 20:19:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:03,120 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 3686 transitions. [2021-07-13 20:19:03,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:03,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 3686 transitions. [2021-07-13 20:19:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:03,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:03,121 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:03,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:03,322 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:03,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:03,322 INFO L82 PathProgramCache]: Analyzing trace with hash -945367575, now seen corresponding path program 238 times [2021-07-13 20:19:03,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:03,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529223538] [2021-07-13 20:19:03,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:03,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:03,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529223538] [2021-07-13 20:19:03,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529223538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:03,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657755761] [2021-07-13 20:19:03,731 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:03,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:03,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:03,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:19:03,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:04,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:04,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:04,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:04,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:04,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:04,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:04,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:19:04,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:04,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:04,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:04,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:19:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:04,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657755761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:04,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:04,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:19:04,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349748309] [2021-07-13 20:19:04,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:19:04,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:04,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:19:04,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:04,326 INFO L87 Difference]: Start difference. First operand 1810 states and 3686 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:07,432 INFO L93 Difference]: Finished difference Result 2103 states and 4238 transitions. [2021-07-13 20:19:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:19:07,433 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:07,435 INFO L225 Difference]: With dead ends: 2103 [2021-07-13 20:19:07,435 INFO L226 Difference]: Without dead ends: 2007 [2021-07-13 20:19:07,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 2585.5ms TimeCoverageRelationStatistics Valid=531, Invalid=7301, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:19:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-07-13 20:19:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1833. [2021-07-13 20:19:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 2.0398471615720526) internal successors, (3737), 1832 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 3737 transitions. [2021-07-13 20:19:07,452 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 3737 transitions. Word has length 40 [2021-07-13 20:19:07,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:07,452 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 3737 transitions. [2021-07-13 20:19:07,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:07,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 3737 transitions. [2021-07-13 20:19:07,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:07,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:07,454 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:07,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:07,655 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:07,655 INFO L82 PathProgramCache]: Analyzing trace with hash 440255015, now seen corresponding path program 239 times [2021-07-13 20:19:07,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:07,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746702413] [2021-07-13 20:19:07,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:08,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:08,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746702413] [2021-07-13 20:19:08,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746702413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:08,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431256801] [2021-07-13 20:19:08,157 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:08,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:08,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:08,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:19:08,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:08,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:08,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:08,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:08,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:08,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:19:08,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:08,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:08,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:08,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:19:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:08,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431256801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:08,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:08,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-13 20:19:08,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480902899] [2021-07-13 20:19:08,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:19:08,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:19:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:19:08,925 INFO L87 Difference]: Start difference. First operand 1833 states and 3737 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:13,030 INFO L93 Difference]: Finished difference Result 2150 states and 4339 transitions. [2021-07-13 20:19:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:19:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:13,032 INFO L225 Difference]: With dead ends: 2150 [2021-07-13 20:19:13,032 INFO L226 Difference]: Without dead ends: 2062 [2021-07-13 20:19:13,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 3314.9ms TimeCoverageRelationStatistics Valid=621, Invalid=8309, Unknown=0, NotChecked=0, Total=8930 [2021-07-13 20:19:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-07-13 20:19:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1836. [2021-07-13 20:19:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 2.0397820163487737) internal successors, (3743), 1835 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 3743 transitions. [2021-07-13 20:19:13,049 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 3743 transitions. Word has length 40 [2021-07-13 20:19:13,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:13,049 INFO L482 AbstractCegarLoop]: Abstraction has 1836 states and 3743 transitions. [2021-07-13 20:19:13,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:13,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 3743 transitions. [2021-07-13 20:19:13,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:13,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:13,051 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:13,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:13,251 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash -200855575, now seen corresponding path program 240 times [2021-07-13 20:19:13,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:13,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907710013] [2021-07-13 20:19:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:13,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:13,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907710013] [2021-07-13 20:19:13,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907710013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:13,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311133981] [2021-07-13 20:19:13,671 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:13,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:13,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:19:13,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:14,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:14,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:14,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:14,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:14,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:19:14,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:14,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:14,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:14,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:19:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:14,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311133981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:14,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:14,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:19:14,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294501982] [2021-07-13 20:19:14,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:19:14,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:14,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:19:14,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:14,231 INFO L87 Difference]: Start difference. First operand 1836 states and 3743 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:18,951 INFO L93 Difference]: Finished difference Result 2178 states and 4394 transitions. [2021-07-13 20:19:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-13 20:19:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:18,955 INFO L225 Difference]: With dead ends: 2178 [2021-07-13 20:19:18,955 INFO L226 Difference]: Without dead ends: 2114 [2021-07-13 20:19:18,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 3382.6ms TimeCoverageRelationStatistics Valid=791, Invalid=9921, Unknown=0, NotChecked=0, Total=10712 [2021-07-13 20:19:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-07-13 20:19:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1837. [2021-07-13 20:19:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 2.039760348583878) internal successors, (3745), 1836 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 3745 transitions. [2021-07-13 20:19:18,978 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 3745 transitions. Word has length 40 [2021-07-13 20:19:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:18,978 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 3745 transitions. [2021-07-13 20:19:18,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 3745 transitions. [2021-07-13 20:19:18,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:18,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:18,981 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:19,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-07-13 20:19:19,205 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:19,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:19,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1225386791, now seen corresponding path program 241 times [2021-07-13 20:19:19,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:19,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738415584] [2021-07-13 20:19:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:19,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:19,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738415584] [2021-07-13 20:19:19,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738415584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:19,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600759456] [2021-07-13 20:19:19,701 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:19,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:19:19,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:20,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:20,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:20,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:19:20,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:20,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:20,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:20,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:19:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:20,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600759456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:20,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:20,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:19:20,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698843435] [2021-07-13 20:19:20,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:19:20,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:20,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:19:20,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:20,258 INFO L87 Difference]: Start difference. First operand 1837 states and 3745 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:25,096 INFO L93 Difference]: Finished difference Result 2368 states and 4762 transitions. [2021-07-13 20:19:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-13 20:19:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:25,099 INFO L225 Difference]: With dead ends: 2368 [2021-07-13 20:19:25,099 INFO L226 Difference]: Without dead ends: 2278 [2021-07-13 20:19:25,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4476 ImplicationChecksByTransitivity, 3711.2ms TimeCoverageRelationStatistics Valid=962, Invalid=13080, Unknown=0, NotChecked=0, Total=14042 [2021-07-13 20:19:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-07-13 20:19:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1842. [2021-07-13 20:19:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 2.0391091797935905) internal successors, (3754), 1841 states have internal predecessors, (3754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 3754 transitions. [2021-07-13 20:19:25,117 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 3754 transitions. Word has length 40 [2021-07-13 20:19:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:25,117 INFO L482 AbstractCegarLoop]: Abstraction has 1842 states and 3754 transitions. [2021-07-13 20:19:25,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 3754 transitions. [2021-07-13 20:19:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:25,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:25,119 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:25,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:25,320 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:25,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:25,320 INFO L82 PathProgramCache]: Analyzing trace with hash 310754045, now seen corresponding path program 242 times [2021-07-13 20:19:25,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:25,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850118924] [2021-07-13 20:19:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:25,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:25,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850118924] [2021-07-13 20:19:25,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850118924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:25,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416626314] [2021-07-13 20:19:25,753 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:25,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:25,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:25,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:19:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:26,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:26,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:26,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:26,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:26,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:26,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:19:26,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:26,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:26,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:26,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:16 [2021-07-13 20:19:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:26,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416626314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:26,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:26,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:19:26,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241208018] [2021-07-13 20:19:26,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:19:26,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:26,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:19:26,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:26,303 INFO L87 Difference]: Start difference. First operand 1842 states and 3754 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:29,118 INFO L93 Difference]: Finished difference Result 2097 states and 4227 transitions. [2021-07-13 20:19:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:19:29,118 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:29,121 INFO L225 Difference]: With dead ends: 2097 [2021-07-13 20:19:29,121 INFO L226 Difference]: Without dead ends: 2041 [2021-07-13 20:19:29,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 2188.6ms TimeCoverageRelationStatistics Valid=443, Invalid=6199, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:19:29,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-07-13 20:19:29,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1824. [2021-07-13 20:19:29,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 2.040043883708173) internal successors, (3719), 1823 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3719 transitions. [2021-07-13 20:19:29,137 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3719 transitions. Word has length 40 [2021-07-13 20:19:29,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:29,137 INFO L482 AbstractCegarLoop]: Abstraction has 1824 states and 3719 transitions. [2021-07-13 20:19:29,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:29,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3719 transitions. [2021-07-13 20:19:29,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:29,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:29,139 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:29,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-07-13 20:19:29,339 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:29,339 INFO L82 PathProgramCache]: Analyzing trace with hash 314170323, now seen corresponding path program 243 times [2021-07-13 20:19:29,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:29,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015340588] [2021-07-13 20:19:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:29,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:29,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015340588] [2021-07-13 20:19:29,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015340588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:29,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661491529] [2021-07-13 20:19:29,755 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:29,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:19:29,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:29,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:19:29,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:30,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:30,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:30,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:30,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:30,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:19:30,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:30,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:30,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:30,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:19:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:30,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661491529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:30,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:30,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-07-13 20:19:30,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147263354] [2021-07-13 20:19:30,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:19:30,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:30,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:19:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:19:30,379 INFO L87 Difference]: Start difference. First operand 1824 states and 3719 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:33,664 INFO L93 Difference]: Finished difference Result 2110 states and 4255 transitions. [2021-07-13 20:19:33,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:19:33,664 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:33,667 INFO L225 Difference]: With dead ends: 2110 [2021-07-13 20:19:33,667 INFO L226 Difference]: Without dead ends: 2022 [2021-07-13 20:19:33,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 2605.9ms TimeCoverageRelationStatistics Valid=499, Invalid=7157, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:19:33,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-07-13 20:19:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1863. [2021-07-13 20:19:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.0408163265306123) internal successors, (3800), 1862 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 3800 transitions. [2021-07-13 20:19:33,684 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 3800 transitions. Word has length 40 [2021-07-13 20:19:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:33,684 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 3800 transitions. [2021-07-13 20:19:33,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 3800 transitions. [2021-07-13 20:19:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:33,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:33,685 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:33,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-07-13 20:19:33,886 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash -326940267, now seen corresponding path program 244 times [2021-07-13 20:19:33,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:33,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275560560] [2021-07-13 20:19:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:34,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:34,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275560560] [2021-07-13 20:19:34,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275560560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:34,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379857144] [2021-07-13 20:19:34,301 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:34,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:19:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:34,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:19:34,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:34,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:34,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:34,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:19:34,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:34,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:34,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:34,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:19:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:34,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379857144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:34,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:34,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-07-13 20:19:34,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837117356] [2021-07-13 20:19:34,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 20:19:34,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:34,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 20:19:34,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:19:34,862 INFO L87 Difference]: Start difference. First operand 1863 states and 3800 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:38,186 INFO L93 Difference]: Finished difference Result 2124 states and 4289 transitions. [2021-07-13 20:19:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:19:38,186 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:38,188 INFO L225 Difference]: With dead ends: 2124 [2021-07-13 20:19:38,188 INFO L226 Difference]: Without dead ends: 2060 [2021-07-13 20:19:38,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 2443.7ms TimeCoverageRelationStatistics Valid=506, Invalid=7150, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:19:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-07-13 20:19:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1877. [2021-07-13 20:19:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.041044776119403) internal successors, (3829), 1876 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3829 transitions. [2021-07-13 20:19:38,205 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3829 transitions. Word has length 40 [2021-07-13 20:19:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:38,205 INFO L482 AbstractCegarLoop]: Abstraction has 1877 states and 3829 transitions. [2021-07-13 20:19:38,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3829 transitions. [2021-07-13 20:19:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:38,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:38,207 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:38,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:38,409 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:38,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1099302099, now seen corresponding path program 245 times [2021-07-13 20:19:38,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:38,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155508123] [2021-07-13 20:19:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:38,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:38,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155508123] [2021-07-13 20:19:38,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155508123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:38,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956625701] [2021-07-13 20:19:38,821 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:38,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:19:38,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:38,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:19:38,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:39,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:39,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:39,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:39,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:39,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:19:39,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:39,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:39,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:39,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:19:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:39,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956625701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:39,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:39,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 38 [2021-07-13 20:19:39,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922725579] [2021-07-13 20:19:39,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:19:39,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:39,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:19:39,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1361, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:19:39,420 INFO L87 Difference]: Start difference. First operand 1877 states and 3829 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:43,392 INFO L93 Difference]: Finished difference Result 2198 states and 4424 transitions. [2021-07-13 20:19:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 20:19:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:43,395 INFO L225 Difference]: With dead ends: 2198 [2021-07-13 20:19:43,395 INFO L226 Difference]: Without dead ends: 2120 [2021-07-13 20:19:43,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3057 ImplicationChecksByTransitivity, 2772.2ms TimeCoverageRelationStatistics Valid=640, Invalid=9260, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:19:43,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-07-13 20:19:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1876. [2021-07-13 20:19:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.0405333333333333) internal successors, (3826), 1875 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 3826 transitions. [2021-07-13 20:19:43,414 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 3826 transitions. Word has length 40 [2021-07-13 20:19:43,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:43,414 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 3826 transitions. [2021-07-13 20:19:43,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 3826 transitions. [2021-07-13 20:19:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:43,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:43,416 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:43,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-07-13 20:19:43,616 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash 994455481, now seen corresponding path program 246 times [2021-07-13 20:19:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:43,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445747364] [2021-07-13 20:19:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:44,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:44,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445747364] [2021-07-13 20:19:44,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445747364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:44,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293799627] [2021-07-13 20:19:44,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:44,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:19:44,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:44,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 54 conjunts are in the unsatisfiable core [2021-07-13 20:19:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:44,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:44,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:44,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:44,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:44,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:44,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:44,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:44,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:44,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:44,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:44,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2021-07-13 20:19:44,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:44,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:44,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:44,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:10 [2021-07-13 20:19:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:45,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293799627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:45,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:45,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 44 [2021-07-13 20:19:45,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806907397] [2021-07-13 20:19:45,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:19:45,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:45,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:19:45,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1863, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:19:45,003 INFO L87 Difference]: Start difference. First operand 1876 states and 3826 transitions. Second operand has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:49,418 INFO L93 Difference]: Finished difference Result 2144 states and 4327 transitions. [2021-07-13 20:19:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:19:49,418 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:49,421 INFO L225 Difference]: With dead ends: 2144 [2021-07-13 20:19:49,421 INFO L226 Difference]: Without dead ends: 2080 [2021-07-13 20:19:49,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 3384.4ms TimeCoverageRelationStatistics Valid=545, Invalid=7645, Unknown=0, NotChecked=0, Total=8190 [2021-07-13 20:19:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-07-13 20:19:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1891. [2021-07-13 20:19:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 2.043915343915344) internal successors, (3863), 1890 states have internal predecessors, (3863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 3863 transitions. [2021-07-13 20:19:49,437 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 3863 transitions. Word has length 40 [2021-07-13 20:19:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:49,437 INFO L482 AbstractCegarLoop]: Abstraction has 1891 states and 3863 transitions. [2021-07-13 20:19:49,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 3863 transitions. [2021-07-13 20:19:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:49,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:49,439 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:49,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:49,639 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:49,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:49,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1041343209, now seen corresponding path program 247 times [2021-07-13 20:19:49,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:49,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633575333] [2021-07-13 20:19:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:50,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:50,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633575333] [2021-07-13 20:19:50,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633575333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:50,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362590617] [2021-07-13 20:19:50,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:50,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:19:50,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:50,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:50,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:50,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:50,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:50,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:50,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:50,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:19:50,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:50,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:50,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:50,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:19:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:50,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362590617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:50,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:50,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:19:50,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215262005] [2021-07-13 20:19:50,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:19:50,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:50,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:19:50,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:19:50,697 INFO L87 Difference]: Start difference. First operand 1891 states and 3863 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:52,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:52,258 INFO L93 Difference]: Finished difference Result 2091 states and 4219 transitions. [2021-07-13 20:19:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:19:52,258 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:52,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:52,261 INFO L225 Difference]: With dead ends: 2091 [2021-07-13 20:19:52,261 INFO L226 Difference]: Without dead ends: 2027 [2021-07-13 20:19:52,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1489.6ms TimeCoverageRelationStatistics Valid=234, Invalid=3072, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:19:52,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-07-13 20:19:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1906. [2021-07-13 20:19:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 2.0451443569553804) internal successors, (3896), 1905 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:52,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3896 transitions. [2021-07-13 20:19:52,278 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3896 transitions. Word has length 40 [2021-07-13 20:19:52,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:52,278 INFO L482 AbstractCegarLoop]: Abstraction has 1906 states and 3896 transitions. [2021-07-13 20:19:52,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3896 transitions. [2021-07-13 20:19:52,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:52,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:52,280 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:52,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-07-13 20:19:52,480 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1575048665, now seen corresponding path program 248 times [2021-07-13 20:19:52,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:52,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765191996] [2021-07-13 20:19:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:52,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:52,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765191996] [2021-07-13 20:19:52,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765191996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:52,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614854139] [2021-07-13 20:19:52,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:52,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:19:52,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:52,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:19:52,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:53,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:53,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:53,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:53,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:53,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:53,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:53,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:19:53,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:53,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:53,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:53,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:19:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:53,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614854139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:53,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:53,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:19:53,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493424983] [2021-07-13 20:19:53,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:19:53,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:53,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:19:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:19:53,627 INFO L87 Difference]: Start difference. First operand 1906 states and 3896 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:55,243 INFO L93 Difference]: Finished difference Result 2128 states and 4286 transitions. [2021-07-13 20:19:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:19:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:55,246 INFO L225 Difference]: With dead ends: 2128 [2021-07-13 20:19:55,246 INFO L226 Difference]: Without dead ends: 2064 [2021-07-13 20:19:55,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1549.8ms TimeCoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:19:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-07-13 20:19:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1907. [2021-07-13 20:19:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 2.0451206715634838) internal successors, (3898), 1906 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 3898 transitions. [2021-07-13 20:19:55,262 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 3898 transitions. Word has length 40 [2021-07-13 20:19:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:55,262 INFO L482 AbstractCegarLoop]: Abstraction has 1907 states and 3898 transitions. [2021-07-13 20:19:55,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 3898 transitions. [2021-07-13 20:19:55,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:55,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:55,264 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:55,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:55,465 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:55,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1988883223, now seen corresponding path program 249 times [2021-07-13 20:19:55,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:55,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718805794] [2021-07-13 20:19:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:55,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:55,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718805794] [2021-07-13 20:19:55,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718805794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:55,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949047293] [2021-07-13 20:19:55,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:55,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:19:55,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:55,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:19:55,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:56,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:56,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:56,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:56,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:19:56,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:19:56,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:19:56,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:19:56,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:19:56,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:19:56,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:19:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:56,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949047293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:56,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:56,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 38 [2021-07-13 20:19:56,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943469703] [2021-07-13 20:19:56,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:19:56,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:56,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:19:56,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1374, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:19:56,549 INFO L87 Difference]: Start difference. First operand 1907 states and 3898 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:59,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:59,531 INFO L93 Difference]: Finished difference Result 2312 states and 4641 transitions. [2021-07-13 20:19:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:19:59,531 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:19:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:59,534 INFO L225 Difference]: With dead ends: 2312 [2021-07-13 20:19:59,534 INFO L226 Difference]: Without dead ends: 2180 [2021-07-13 20:19:59,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2529.7ms TimeCoverageRelationStatistics Valid=438, Invalid=6042, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:19:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-07-13 20:19:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1933. [2021-07-13 20:19:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.046583850931677) internal successors, (3954), 1932 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 3954 transitions. [2021-07-13 20:19:59,550 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 3954 transitions. Word has length 40 [2021-07-13 20:19:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:59,550 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 3954 transitions. [2021-07-13 20:19:59,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:59,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 3954 transitions. [2021-07-13 20:19:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:19:59,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:19:59,553 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:19:59,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:59,756 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:19:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:19:59,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1317318617, now seen corresponding path program 250 times [2021-07-13 20:19:59,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:19:59,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820636668] [2021-07-13 20:19:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:19:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:00,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:00,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820636668] [2021-07-13 20:20:00,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820636668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:00,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978898289] [2021-07-13 20:20:00,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:00,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:00,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:00,165 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:20:00,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:00,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:00,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:00,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:00,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:00,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:20:00,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:00,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:00,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:00,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:20:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:00,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978898289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:00,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:00,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:20:00,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70403842] [2021-07-13 20:20:00,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:20:00,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:00,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:20:00,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:20:00,796 INFO L87 Difference]: Start difference. First operand 1933 states and 3954 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:02,735 INFO L93 Difference]: Finished difference Result 2224 states and 4483 transitions. [2021-07-13 20:20:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:20:02,735 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:20:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:02,738 INFO L225 Difference]: With dead ends: 2224 [2021-07-13 20:20:02,738 INFO L226 Difference]: Without dead ends: 2163 [2021-07-13 20:20:02,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1654.3ms TimeCoverageRelationStatistics Valid=272, Invalid=3510, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:20:02,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-07-13 20:20:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1932. [2021-07-13 20:20:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.0466079751424133) internal successors, (3952), 1931 states have internal predecessors, (3952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 3952 transitions. [2021-07-13 20:20:02,759 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 3952 transitions. Word has length 40 [2021-07-13 20:20:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:02,759 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 3952 transitions. [2021-07-13 20:20:02,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 3952 transitions. [2021-07-13 20:20:02,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:20:02,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:02,761 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:02,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:02,964 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:02,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:02,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1592026089, now seen corresponding path program 251 times [2021-07-13 20:20:02,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:02,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090686943] [2021-07-13 20:20:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:03,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:03,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090686943] [2021-07-13 20:20:03,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090686943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:03,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183686209] [2021-07-13 20:20:03,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:03,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:20:03,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:03,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:20:03,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:03,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:03,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:03,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:20:03,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:03,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:03,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:03,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:20:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:04,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183686209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:04,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:04,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:20:04,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139855135] [2021-07-13 20:20:04,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:20:04,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:20:04,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:20:04,054 INFO L87 Difference]: Start difference. First operand 1932 states and 3952 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:06,293 INFO L93 Difference]: Finished difference Result 2264 states and 4568 transitions. [2021-07-13 20:20:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:20:06,293 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:20:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:06,296 INFO L225 Difference]: With dead ends: 2264 [2021-07-13 20:20:06,296 INFO L226 Difference]: Without dead ends: 2216 [2021-07-13 20:20:06,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 1928.9ms TimeCoverageRelationStatistics Valid=302, Invalid=3988, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:20:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-07-13 20:20:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1936. [2021-07-13 20:20:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 2.046511627906977) internal successors, (3960), 1935 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 3960 transitions. [2021-07-13 20:20:06,313 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 3960 transitions. Word has length 40 [2021-07-13 20:20:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:06,313 INFO L482 AbstractCegarLoop]: Abstraction has 1936 states and 3960 transitions. [2021-07-13 20:20:06,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 3960 transitions. [2021-07-13 20:20:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:20:06,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:06,315 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:06,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:06,516 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2061830617, now seen corresponding path program 252 times [2021-07-13 20:20:06,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:06,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427440588] [2021-07-13 20:20:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:06,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:06,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427440588] [2021-07-13 20:20:06,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427440588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:06,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832606607] [2021-07-13 20:20:06,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:06,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:20:06,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:06,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:20:06,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:07,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:07,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:07,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-13 20:20:07,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:07,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:07,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:07,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-07-13 20:20:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:07,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832606607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:07,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:07,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:20:07,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209420197] [2021-07-13 20:20:07,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:20:07,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:07,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:20:07,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:20:07,588 INFO L87 Difference]: Start difference. First operand 1936 states and 3960 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:09,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:09,862 INFO L93 Difference]: Finished difference Result 2294 states and 4630 transitions. [2021-07-13 20:20:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:20:09,862 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 20:20:09,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:09,865 INFO L225 Difference]: With dead ends: 2294 [2021-07-13 20:20:09,865 INFO L226 Difference]: Without dead ends: 2262 [2021-07-13 20:20:09,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 1926.5ms TimeCoverageRelationStatistics Valid=333, Invalid=4223, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:20:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-07-13 20:20:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1937. [2021-07-13 20:20:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 2.0464876033057853) internal successors, (3962), 1936 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 3962 transitions. [2021-07-13 20:20:09,882 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 3962 transitions. Word has length 40 [2021-07-13 20:20:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:09,883 INFO L482 AbstractCegarLoop]: Abstraction has 1937 states and 3962 transitions. [2021-07-13 20:20:09,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 3962 transitions. [2021-07-13 20:20:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 20:20:09,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:09,884 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:10,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-07-13 20:20:10,086 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:10,086 INFO L82 PathProgramCache]: Analyzing trace with hash -806894313, now seen corresponding path program 253 times [2021-07-13 20:20:10,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:10,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241390061] [2021-07-13 20:20:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:10,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:10,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241390061] [2021-07-13 20:20:10,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241390061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:10,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922708582] [2021-07-13 20:20:10,483 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:10,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:20:10,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:10,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:20:10,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:10,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:10,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:20:10,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-07-13 20:20:10,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:10,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:10,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:10,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-07-13 20:20:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:11,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922708582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:11,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:11,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-07-13 20:20:11,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981190897] [2021-07-13 20:20:11,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 20:20:11,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:11,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 20:20:11,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:20:11,110 INFO L87 Difference]: Start difference. First operand 1937 states and 3962 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-13 20:20:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:20:12,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-07-13 20:20:12,727 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:20:12,728 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:20:12,730 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:20:12,730 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:20:12 BasicIcfg [2021-07-13 20:20:12,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:20:12,730 INFO L168 Benchmark]: Toolchain (without parser) took 812576.44 ms. Allocated memory was 186.6 MB in the beginning and 587.2 MB in the end (delta: 400.6 MB). Free memory was 166.6 MB in the beginning and 384.6 MB in the end (delta: -218.0 MB). Peak memory consumption was 183.4 MB. Max. memory is 8.0 GB. [2021-07-13 20:20:12,730 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 186.6 MB. Free memory is still 167.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:20:12,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.98 ms. Allocated memory is still 186.6 MB. Free memory was 166.6 MB in the beginning and 165.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:20:12,731 INFO L168 Benchmark]: Boogie Preprocessor took 18.54 ms. Allocated memory is still 186.6 MB. Free memory was 165.1 MB in the beginning and 164.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:20:12,731 INFO L168 Benchmark]: RCFGBuilder took 426.82 ms. Allocated memory is still 186.6 MB. Free memory was 164.1 MB in the beginning and 151.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:20:12,731 INFO L168 Benchmark]: TraceAbstraction took 812096.91 ms. Allocated memory was 186.6 MB in the beginning and 587.2 MB in the end (delta: 400.6 MB). Free memory was 150.9 MB in the beginning and 384.6 MB in the end (delta: -233.7 MB). Peak memory consumption was 167.7 MB. Max. memory is 8.0 GB. [2021-07-13 20:20:12,731 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 0.13 ms. Allocated memory is still 186.6 MB. Free memory is still 167.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.98 ms. Allocated memory is still 186.6 MB. Free memory was 166.6 MB in the beginning and 165.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.54 ms. Allocated memory is still 186.6 MB. Free memory was 165.1 MB in the beginning and 164.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 426.82 ms. Allocated memory is still 186.6 MB. Free memory was 164.1 MB in the beginning and 151.2 MB in the end (delta: 12.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 812096.91 ms. Allocated memory was 186.6 MB in the beginning and 587.2 MB in the end (delta: 400.6 MB). Free memory was 150.9 MB in the beginning and 384.6 MB in the end (delta: -233.7 MB). Peak memory consumption was 167.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1937states) and FLOYD_HOARE automaton (currently 31 states, 38 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 56 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 42 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 812010.6ms, OverallIterations: 259, TraceHistogramMax: 4, EmptinessCheckTime: 453.7ms, AutomataDifference: 519002.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13659 SDtfs, 42364 SDslu, 193239 SDs, 0 SdLazy, 457597 SolverSat, 20827 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 191252.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22078 GetRequests, 5388 SyntacticMatches, 809 SemanticMatches, 15880 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291144 ImplicationChecksByTransitivity, 462698.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1988occurred in iteration=137, InterpolantAutomatonStates: 11546, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3621.2ms AutomataMinimizationTime, 258 MinimizatonAttempts, 44420 StatesRemovedByMinimization, 256 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 993.4ms SsaConstructionTime, 3481.8ms SatisfiabilityAnalysisTime, 224634.0ms InterpolantComputationTime, 18158 NumberOfCodeBlocks, 18158 NumberOfCodeBlocksAsserted, 869 NumberOfCheckSat, 17642 ConstructedInterpolants, 1412 QuantifiedInterpolants, 324216 SizeOfPredicates, 2303 NumberOfNonLiveVariables, 20089 ConjunctsInSsa, 9597 ConjunctsInUnsatCore, 516 InterpolantComputations, 3 PerfectInterpolantSequences, 105/14035 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