/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 20:04:15,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 20:04:15,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 20:04:15,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 20:04:15,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 20:04:15,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 20:04:16,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 20:04:16,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 20:04:16,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 20:04:16,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 20:04:16,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 20:04:16,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 20:04:16,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 20:04:16,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 20:04:16,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 20:04:16,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 20:04:16,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-12 20:04:16,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 20:04:16,064 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 20:04:16,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 20:04:16,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 20:04:16,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 20:04:16,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 20:04:16,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 20:04:16,067 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 20:04:16,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 20:04:16,068 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 20:04:16,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 20:04:16,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 20:04:16,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 20:04:16,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 20:04:16,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 20:04:16,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 20:04:16,069 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 20:04:16,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 20:04:16,069 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 20:04:16,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 20:04:16,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 20:04:16,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 20:04:16,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 20:04:16,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 20:04:16,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 20:04:16,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 20:04:16,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 20:04:16,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 20:04:16,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 20:04:16,070 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 20:04:16,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 20:04:16,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 20:04:16,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 20:04:16,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 20:04:16,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 20:04:16,347 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 20:04:16,348 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 20:04:16,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl [2021-08-12 20:04:16,349 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun.wvr.bpl' [2021-08-12 20:04:16,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 20:04:16,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 20:04:16,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 20:04:16,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 20:04:16,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 20:04:16,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:04:16" (1/1) ... [2021-08-12 20:04:16,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:04:16" (1/1) ... [2021-08-12 20:04:16,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 20:04:16,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 20:04:16,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 20:04:16,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 20:04:16,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:04:16" (1/1) ... [2021-08-12 20:04:16,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:04:16" (1/1) ... [2021-08-12 20:04:16,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:04:16" (1/1) ... [2021-08-12 20:04:16,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:04:16" (1/1) ... [2021-08-12 20:04:16,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:04:16" (1/1) ... [2021-08-12 20:04:16,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:04:16" (1/1) ... [2021-08-12 20:04:16,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:04:16" (1/1) ... [2021-08-12 20:04:16,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 20:04:16,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 20:04:16,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 20:04:16,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 20:04:16,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:04:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 20:04:16,478 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 20:04:16,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 20:04:16,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 20:04:16,478 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 20:04:16,479 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 20:04:16,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 20:04:16,479 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 20:04:16,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 20:04:16,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 20:04:16,479 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 20:04:16,479 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 20:04:16,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 20:04:16,481 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 20:04:16,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 20:04:16,697 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 20:04:16,698 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 08:04:16 BoogieIcfgContainer [2021-08-12 20:04:16,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 20:04:16,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 20:04:16,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 20:04:16,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 20:04:16,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 08:04:16" (1/2) ... [2021-08-12 20:04:16,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c2a4a6a and model type sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 08:04:16, skipping insertion in model container [2021-08-12 20:04:16,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 08:04:16" (2/2) ... [2021-08-12 20:04:16,703 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun.wvr.bpl [2021-08-12 20:04:16,712 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 20:04:16,713 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 20:04:16,713 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 20:04:16,755 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-12 20:04:16,770 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-12 20:04:16,795 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 20:04:16,795 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 20:04:16,795 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 20:04:16,795 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 20:04:16,795 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 20:04:16,795 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 20:04:16,795 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 20:04:16,795 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 20:04:16,802 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-08-12 20:04:16,834 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-12 20:04:16,849 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:16,849 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:16,850 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:16,853 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-08-12 20:04:16,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:16,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090136979] [2021-08-12 20:04:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:17,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:17,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090136979] [2021-08-12 20:04:17,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090136979] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 20:04:17,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 20:04:17,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 20:04:17,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131381977] [2021-08-12 20:04:17,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 20:04:17,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 20:04:17,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:04:17,046 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:17,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:17,159 INFO L93 Difference]: Finished difference Result 221 states and 622 transitions. [2021-08-12 20:04:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 20:04:17,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-12 20:04:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:17,169 INFO L225 Difference]: With dead ends: 221 [2021-08-12 20:04:17,169 INFO L226 Difference]: Without dead ends: 154 [2021-08-12 20:04:17,171 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-12 20:04:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-12 20:04:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-08-12 20:04:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-08-12 20:04:17,223 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-08-12 20:04:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:17,224 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-08-12 20:04:17,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-08-12 20:04:17,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 20:04:17,225 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:17,226 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:17,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 20:04:17,226 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:17,227 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-08-12 20:04:17,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:17,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273140638] [2021-08-12 20:04:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:04:17,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:17,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273140638] [2021-08-12 20:04:17,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273140638] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 20:04:17,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 20:04:17,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 20:04:17,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064611022] [2021-08-12 20:04:17,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 20:04:17,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:17,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 20:04:17,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 20:04:17,267 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:17,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:17,323 INFO L93 Difference]: Finished difference Result 211 states and 599 transitions. [2021-08-12 20:04:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 20:04:17,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 20:04:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:17,328 INFO L225 Difference]: With dead ends: 211 [2021-08-12 20:04:17,328 INFO L226 Difference]: Without dead ends: 158 [2021-08-12 20:04:17,329 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 20:04:17,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-12 20:04:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-08-12 20:04:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-08-12 20:04:17,343 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-08-12 20:04:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:17,343 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-08-12 20:04:17,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-08-12 20:04:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 20:04:17,345 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:17,345 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:17,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 20:04:17,345 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:17,346 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-08-12 20:04:17,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:17,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547052048] [2021-08-12 20:04:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:17,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:17,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547052048] [2021-08-12 20:04:17,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547052048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:17,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546287988] [2021-08-12 20:04:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:17,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 20:04:17,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:17,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:04:17,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 20:04:17,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:17,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:04:17,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-08-12 20:04:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:17,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546287988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:17,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:17,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:04:17,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472278383] [2021-08-12 20:04:17,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:04:17,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:17,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:04:17,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:04:17,988 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:18,220 INFO L93 Difference]: Finished difference Result 332 states and 937 transitions. [2021-08-12 20:04:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 20:04:18,220 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-12 20:04:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:18,225 INFO L225 Difference]: With dead ends: 332 [2021-08-12 20:04:18,225 INFO L226 Difference]: Without dead ends: 315 [2021-08-12 20:04:18,226 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:04:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-12 20:04:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-08-12 20:04:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-08-12 20:04:18,259 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-08-12 20:04:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:18,259 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-08-12 20:04:18,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-08-12 20:04:18,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 20:04:18,264 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:18,264 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:18,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-12 20:04:18,477 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:18,477 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-08-12 20:04:18,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:18,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255554875] [2021-08-12 20:04:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:18,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:18,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255554875] [2021-08-12 20:04:18,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255554875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:18,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512403509] [2021-08-12 20:04:18,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:18,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:04:18,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:18,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 20:04:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:18,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:18,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-12 20:04:18,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:04:18,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:18,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:04:18,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-08-12 20:04:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:18,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512403509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:18,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:18,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-12 20:04:18,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105141123] [2021-08-12 20:04:18,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:18,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:18,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:18,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:18,912 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:19,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:19,267 INFO L93 Difference]: Finished difference Result 376 states and 1079 transitions. [2021-08-12 20:04:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 20:04:19,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-12 20:04:19,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:19,270 INFO L225 Difference]: With dead ends: 376 [2021-08-12 20:04:19,270 INFO L226 Difference]: Without dead ends: 359 [2021-08-12 20:04:19,271 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:04:19,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-12 20:04:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-08-12 20:04:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-08-12 20:04:19,281 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-08-12 20:04:19,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:19,281 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-08-12 20:04:19,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-08-12 20:04:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 20:04:19,282 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:19,282 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:19,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:19,487 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-08-12 20:04:19,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:19,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488581990] [2021-08-12 20:04:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:19,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:19,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488581990] [2021-08-12 20:04:19,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488581990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:19,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678506331] [2021-08-12 20:04:19,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:19,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 20:04:19,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:19,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 20:04:19,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:19,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 20:04:19,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:19,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:04:19,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2021-08-12 20:04:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:19,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678506331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:19,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:19,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-12 20:04:19,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575050852] [2021-08-12 20:04:19,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:04:19,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:19,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:04:19,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:04:19,810 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:19,944 INFO L93 Difference]: Finished difference Result 298 states and 833 transitions. [2021-08-12 20:04:19,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 20:04:19,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-12 20:04:19,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:19,946 INFO L225 Difference]: With dead ends: 298 [2021-08-12 20:04:19,946 INFO L226 Difference]: Without dead ends: 281 [2021-08-12 20:04:19,947 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:04:19,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-12 20:04:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-08-12 20:04:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-08-12 20:04:19,956 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-08-12 20:04:19,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:19,956 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-08-12 20:04:19,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:19,956 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-08-12 20:04:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 20:04:19,957 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:19,957 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:20,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:20,173 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:20,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-08-12 20:04:20,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:20,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637642702] [2021-08-12 20:04:20,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:20,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:20,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637642702] [2021-08-12 20:04:20,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637642702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:20,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577739284] [2021-08-12 20:04:20,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 20:04:20,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:04:20,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 20:04:20,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:20,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:20,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-12 20:04:20,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:04:20,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:04:20,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:04:20,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2021-08-12 20:04:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:20,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577739284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:20,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:20,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:04:20,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062483284] [2021-08-12 20:04:20,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:04:20,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:20,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:04:20,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:04:20,493 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:20,701 INFO L93 Difference]: Finished difference Result 427 states and 1235 transitions. [2021-08-12 20:04:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 20:04:20,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-12 20:04:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:20,703 INFO L225 Difference]: With dead ends: 427 [2021-08-12 20:04:20,703 INFO L226 Difference]: Without dead ends: 410 [2021-08-12 20:04:20,704 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:04:20,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-12 20:04:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-08-12 20:04:20,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-08-12 20:04:20,716 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-08-12 20:04:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:20,717 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-08-12 20:04:20,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-08-12 20:04:20,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:20,717 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:20,718 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:20,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:20,936 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:20,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:20,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-08-12 20:04:20,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:20,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033085316] [2021-08-12 20:04:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:20,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:20,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033085316] [2021-08-12 20:04:20,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033085316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:20,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9171657] [2021-08-12 20:04:20,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:21,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:04:21,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:21,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:21,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:21,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9171657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:21,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:21,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:04:21,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508425329] [2021-08-12 20:04:21,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:04:21,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:21,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:04:21,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:04:21,101 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:21,459 INFO L93 Difference]: Finished difference Result 644 states and 1840 transitions. [2021-08-12 20:04:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 20:04:21,460 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:21,463 INFO L225 Difference]: With dead ends: 644 [2021-08-12 20:04:21,463 INFO L226 Difference]: Without dead ends: 619 [2021-08-12 20:04:21,463 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:04:21,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-12 20:04:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-08-12 20:04:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-08-12 20:04:21,480 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-08-12 20:04:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:21,481 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-08-12 20:04:21,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-08-12 20:04:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:21,482 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:21,482 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:21,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 20:04:21,699 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:21,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-08-12 20:04:21,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:21,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683609440] [2021-08-12 20:04:21,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:21,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:21,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683609440] [2021-08-12 20:04:21,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683609440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:21,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98767330] [2021-08-12 20:04:21,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:21,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:04:21,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:21,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:21,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:21,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98767330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:21,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:21,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:04:21,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818059101] [2021-08-12 20:04:21,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:21,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:21,897 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:22,709 INFO L93 Difference]: Finished difference Result 1103 states and 3056 transitions. [2021-08-12 20:04:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 20:04:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:22,715 INFO L225 Difference]: With dead ends: 1103 [2021-08-12 20:04:22,715 INFO L226 Difference]: Without dead ends: 1078 [2021-08-12 20:04:22,716 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 443.6ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 20:04:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-12 20:04:22,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-08-12 20:04:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-08-12 20:04:22,736 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-08-12 20:04:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:22,736 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-08-12 20:04:22,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-08-12 20:04:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:22,737 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:22,737 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:22,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:22,953 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:22,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-08-12 20:04:22,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:22,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270014031] [2021-08-12 20:04:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:22,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:22,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270014031] [2021-08-12 20:04:22,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270014031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:22,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903851612] [2021-08-12 20:04:22,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:23,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:23,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:23,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903851612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:23,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:23,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:04:23,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072864839] [2021-08-12 20:04:23,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:23,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:23,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:23,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:23,106 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:23,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:23,870 INFO L93 Difference]: Finished difference Result 976 states and 2754 transitions. [2021-08-12 20:04:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 20:04:23,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:23,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:23,874 INFO L225 Difference]: With dead ends: 976 [2021-08-12 20:04:23,874 INFO L226 Difference]: Without dead ends: 951 [2021-08-12 20:04:23,875 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 20:04:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-12 20:04:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-08-12 20:04:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-08-12 20:04:23,896 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-08-12 20:04:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:23,896 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-08-12 20:04:23,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-08-12 20:04:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:23,897 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:23,897 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:24,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:24,102 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:24,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:24,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-08-12 20:04:24,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:24,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422167018] [2021-08-12 20:04:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:04:24,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:24,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422167018] [2021-08-12 20:04:24,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422167018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:24,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865715088] [2021-08-12 20:04:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:24,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:04:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:04:24,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865715088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:24,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:24,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 20:04:24,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510509905] [2021-08-12 20:04:24,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:04:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:24,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:04:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:04:24,208 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:24,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:24,407 INFO L93 Difference]: Finished difference Result 745 states and 2187 transitions. [2021-08-12 20:04:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 20:04:24,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:24,410 INFO L225 Difference]: With dead ends: 745 [2021-08-12 20:04:24,410 INFO L226 Difference]: Without dead ends: 663 [2021-08-12 20:04:24,411 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-12 20:04:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-08-12 20:04:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-08-12 20:04:24,444 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-08-12 20:04:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:24,444 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-08-12 20:04:24,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-08-12 20:04:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:24,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:24,447 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:24,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 20:04:24,663 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-08-12 20:04:24,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:24,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463130486] [2021-08-12 20:04:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:24,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:24,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463130486] [2021-08-12 20:04:24,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463130486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:24,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32250385] [2021-08-12 20:04:24,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:24,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:04:24,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:24,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:24,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:24,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32250385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:24,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:24,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 20:04:24,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942030451] [2021-08-12 20:04:24,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:24,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:24,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:24,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:24,825 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:25,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:25,073 INFO L93 Difference]: Finished difference Result 765 states and 2274 transitions. [2021-08-12 20:04:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 20:04:25,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:25,077 INFO L225 Difference]: With dead ends: 765 [2021-08-12 20:04:25,077 INFO L226 Difference]: Without dead ends: 672 [2021-08-12 20:04:25,077 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-12 20:04:25,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-12 20:04:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-08-12 20:04:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-08-12 20:04:25,105 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-08-12 20:04:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:25,105 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-08-12 20:04:25,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:25,105 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-08-12 20:04:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:25,106 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:25,106 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:25,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 20:04:25,321 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-08-12 20:04:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318232330] [2021-08-12 20:04:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:04:25,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:25,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318232330] [2021-08-12 20:04:25,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318232330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:25,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555333633] [2021-08-12 20:04:25,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:25,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:04:25,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:25,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:04:25,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:04:25,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555333633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:25,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:25,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 20:04:25,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841986205] [2021-08-12 20:04:25,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:04:25,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:25,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:04:25,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:04:25,439 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:25,682 INFO L93 Difference]: Finished difference Result 966 states and 2852 transitions. [2021-08-12 20:04:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 20:04:25,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:25,687 INFO L225 Difference]: With dead ends: 966 [2021-08-12 20:04:25,687 INFO L226 Difference]: Without dead ends: 830 [2021-08-12 20:04:25,687 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-12 20:04:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-08-12 20:04:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-08-12 20:04:25,724 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-08-12 20:04:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:25,725 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-08-12 20:04:25,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-08-12 20:04:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:25,726 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:25,726 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:25,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 20:04:25,941 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:25,941 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-08-12 20:04:25,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:25,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289272705] [2021-08-12 20:04:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:25,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:25,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289272705] [2021-08-12 20:04:25,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289272705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:25,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862513208] [2021-08-12 20:04:25,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:26,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:04:26,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:26,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:26,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862513208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:26,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:26,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:04:26,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687144460] [2021-08-12 20:04:26,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:04:26,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:26,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:04:26,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:04:26,086 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:26,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:26,525 INFO L93 Difference]: Finished difference Result 1221 states and 3556 transitions. [2021-08-12 20:04:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:04:26,526 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:26,531 INFO L225 Difference]: With dead ends: 1221 [2021-08-12 20:04:26,532 INFO L226 Difference]: Without dead ends: 1196 [2021-08-12 20:04:26,532 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-12 20:04:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-12 20:04:26,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-08-12 20:04:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:26,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-08-12 20:04:26,567 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-08-12 20:04:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:26,568 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-08-12 20:04:26,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-08-12 20:04:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:26,569 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:26,569 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:26,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 20:04:26,785 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:26,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:26,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-08-12 20:04:26,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:26,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505604158] [2021-08-12 20:04:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:26,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:26,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505604158] [2021-08-12 20:04:26,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505604158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:26,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078738324] [2021-08-12 20:04:26,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:26,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:04:26,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:26,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:26,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:26,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078738324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:26,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:26,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:04:26,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725226141] [2021-08-12 20:04:26,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:04:26,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:26,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:04:26,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:04:26,919 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:27,557 INFO L93 Difference]: Finished difference Result 1517 states and 4304 transitions. [2021-08-12 20:04:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 20:04:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:27,564 INFO L225 Difference]: With dead ends: 1517 [2021-08-12 20:04:27,564 INFO L226 Difference]: Without dead ends: 1492 [2021-08-12 20:04:27,564 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 20:04:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-12 20:04:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-08-12 20:04:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-08-12 20:04:27,607 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-08-12 20:04:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:27,607 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-08-12 20:04:27,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-08-12 20:04:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:27,608 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:27,608 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:27,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 20:04:27,818 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:27,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:27,819 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-08-12 20:04:27,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:27,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917404430] [2021-08-12 20:04:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:27,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:27,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917404430] [2021-08-12 20:04:27,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917404430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:27,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972964910] [2021-08-12 20:04:27,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:27,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:04:27,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:27,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:27,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:27,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972964910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:27,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:27,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 20:04:27,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862305593] [2021-08-12 20:04:27,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:27,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:27,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:27,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:27,997 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:28,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:28,483 INFO L93 Difference]: Finished difference Result 1363 states and 4072 transitions. [2021-08-12 20:04:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:04:28,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:28,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:28,490 INFO L225 Difference]: With dead ends: 1363 [2021-08-12 20:04:28,490 INFO L226 Difference]: Without dead ends: 1248 [2021-08-12 20:04:28,493 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-08-12 20:04:28,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-08-12 20:04:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-08-12 20:04:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-08-12 20:04:28,548 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-08-12 20:04:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:28,548 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-08-12 20:04:28,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-08-12 20:04:28,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:28,549 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:28,549 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:28,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:28,761 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:28,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-08-12 20:04:28,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:28,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156994989] [2021-08-12 20:04:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:28,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:28,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156994989] [2021-08-12 20:04:28,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156994989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:28,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126811254] [2021-08-12 20:04:28,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:28,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:04:28,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:28,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:28,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126811254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:28,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:28,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-12 20:04:28,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638784249] [2021-08-12 20:04:28,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:28,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:28,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:28,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:28,893 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:29,361 INFO L93 Difference]: Finished difference Result 1408 states and 4261 transitions. [2021-08-12 20:04:29,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 20:04:29,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:29,367 INFO L225 Difference]: With dead ends: 1408 [2021-08-12 20:04:29,367 INFO L226 Difference]: Without dead ends: 1329 [2021-08-12 20:04:29,367 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:04:29,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-08-12 20:04:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-08-12 20:04:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-08-12 20:04:29,426 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-08-12 20:04:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:29,427 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-08-12 20:04:29,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-08-12 20:04:29,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:29,428 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:29,428 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:29,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:29,644 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:29,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-08-12 20:04:29,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:29,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243122841] [2021-08-12 20:04:29,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:29,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:29,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243122841] [2021-08-12 20:04:29,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243122841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:29,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935961617] [2021-08-12 20:04:29,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:29,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:29,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935961617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:29,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:29,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:04:29,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805424825] [2021-08-12 20:04:29,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:04:29,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:29,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:04:29,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:04:29,770 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:30,533 INFO L93 Difference]: Finished difference Result 1573 states and 4696 transitions. [2021-08-12 20:04:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 20:04:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:30,545 INFO L225 Difference]: With dead ends: 1573 [2021-08-12 20:04:30,545 INFO L226 Difference]: Without dead ends: 1544 [2021-08-12 20:04:30,546 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:04:30,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-12 20:04:30,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-08-12 20:04:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-08-12 20:04:30,625 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-08-12 20:04:30,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:30,625 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-08-12 20:04:30,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:30,625 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-08-12 20:04:30,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:30,627 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:30,627 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:30,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 20:04:30,828 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:30,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-08-12 20:04:30,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:30,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874056757] [2021-08-12 20:04:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:30,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:30,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874056757] [2021-08-12 20:04:30,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874056757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:30,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468057563] [2021-08-12 20:04:30,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:30,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:04:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:30,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:30,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468057563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:30,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:30,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:04:30,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374336832] [2021-08-12 20:04:30,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:30,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:30,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:30,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:30,998 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:32,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:32,461 INFO L93 Difference]: Finished difference Result 2759 states and 8237 transitions. [2021-08-12 20:04:32,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-12 20:04:32,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:32,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:32,475 INFO L225 Difference]: With dead ends: 2759 [2021-08-12 20:04:32,475 INFO L226 Difference]: Without dead ends: 2734 [2021-08-12 20:04:32,477 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 466.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 20:04:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-08-12 20:04:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-08-12 20:04:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-08-12 20:04:32,576 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-08-12 20:04:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:32,576 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-08-12 20:04:32,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-08-12 20:04:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:32,578 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:32,578 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:32,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:32,785 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:32,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-08-12 20:04:32,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:32,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13115207] [2021-08-12 20:04:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:32,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:32,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13115207] [2021-08-12 20:04:32,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13115207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:32,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15304365] [2021-08-12 20:04:32,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:32,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:04:32,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:32,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:32,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:32,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15304365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:32,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:32,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:04:32,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714894484] [2021-08-12 20:04:32,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:32,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:32,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:32,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:32,958 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:34,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:34,428 INFO L93 Difference]: Finished difference Result 2718 states and 8127 transitions. [2021-08-12 20:04:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-12 20:04:34,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:34,438 INFO L225 Difference]: With dead ends: 2718 [2021-08-12 20:04:34,438 INFO L226 Difference]: Without dead ends: 2693 [2021-08-12 20:04:34,439 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 464.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 20:04:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-08-12 20:04:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-08-12 20:04:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:34,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-08-12 20:04:34,574 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-08-12 20:04:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:34,575 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-08-12 20:04:34,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-08-12 20:04:34,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:34,577 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:34,577 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:34,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 20:04:34,793 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:34,793 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-08-12 20:04:34,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:34,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279439880] [2021-08-12 20:04:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:34,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:34,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279439880] [2021-08-12 20:04:34,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279439880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:34,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124681848] [2021-08-12 20:04:34,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:34,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:04:34,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:34,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:34,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:34,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124681848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:34,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:34,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:04:34,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748216182] [2021-08-12 20:04:34,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:04:34,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:34,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:04:34,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:04:34,945 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:36,482 INFO L93 Difference]: Finished difference Result 2702 states and 7881 transitions. [2021-08-12 20:04:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 20:04:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:36,490 INFO L225 Difference]: With dead ends: 2702 [2021-08-12 20:04:36,491 INFO L226 Difference]: Without dead ends: 2677 [2021-08-12 20:04:36,492 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 20:04:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-12 20:04:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-08-12 20:04:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-08-12 20:04:36,597 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-08-12 20:04:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:36,597 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-08-12 20:04:36,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-08-12 20:04:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:36,599 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:36,599 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:36,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 20:04:36,801 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:36,801 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-08-12 20:04:36,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:36,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169172695] [2021-08-12 20:04:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:36,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:36,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169172695] [2021-08-12 20:04:36,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169172695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:36,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017929702] [2021-08-12 20:04:36,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:36,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 20:04:36,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:36,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:36,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:36,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017929702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:36,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:36,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:04:36,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582243166] [2021-08-12 20:04:36,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:04:36,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:04:36,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:04:36,937 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:38,352 INFO L93 Difference]: Finished difference Result 2499 states and 7378 transitions. [2021-08-12 20:04:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 20:04:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:38,360 INFO L225 Difference]: With dead ends: 2499 [2021-08-12 20:04:38,361 INFO L226 Difference]: Without dead ends: 2470 [2021-08-12 20:04:38,362 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 20:04:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-08-12 20:04:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-08-12 20:04:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-08-12 20:04:38,466 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-08-12 20:04:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:38,466 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-08-12 20:04:38,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-08-12 20:04:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:38,468 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:38,468 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:38,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 20:04:38,673 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-08-12 20:04:38,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:38,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850032932] [2021-08-12 20:04:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:38,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:38,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850032932] [2021-08-12 20:04:38,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850032932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:38,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720612216] [2021-08-12 20:04:38,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:38,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 20:04:38,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:38,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:38,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720612216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:38,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:38,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:04:38,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893491851] [2021-08-12 20:04:38,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:38,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:38,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:38,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:38,823 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:40,493 INFO L93 Difference]: Finished difference Result 2539 states and 7492 transitions. [2021-08-12 20:04:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 20:04:40,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:40,502 INFO L225 Difference]: With dead ends: 2539 [2021-08-12 20:04:40,502 INFO L226 Difference]: Without dead ends: 2514 [2021-08-12 20:04:40,503 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 20:04:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-12 20:04:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-08-12 20:04:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-08-12 20:04:40,603 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-08-12 20:04:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:40,603 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-08-12 20:04:40,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-08-12 20:04:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:40,605 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:40,605 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:40,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 20:04:40,822 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:40,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-08-12 20:04:40,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:40,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474731786] [2021-08-12 20:04:40,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:40,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:40,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474731786] [2021-08-12 20:04:40,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474731786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:40,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237622407] [2021-08-12 20:04:40,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 20:04:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:40,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:40,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:40,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237622407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:40,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:40,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:04:40,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954749270] [2021-08-12 20:04:40,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:40,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:40,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:40,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:40,978 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:42,506 INFO L93 Difference]: Finished difference Result 2357 states and 7054 transitions. [2021-08-12 20:04:42,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 20:04:42,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:42,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:42,513 INFO L225 Difference]: With dead ends: 2357 [2021-08-12 20:04:42,513 INFO L226 Difference]: Without dead ends: 2328 [2021-08-12 20:04:42,514 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 20:04:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-12 20:04:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-08-12 20:04:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-08-12 20:04:42,600 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-08-12 20:04:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:42,600 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-08-12 20:04:42,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:42,601 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-08-12 20:04:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:42,603 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:42,603 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:42,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 20:04:42,819 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-08-12 20:04:42,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:42,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971922890] [2021-08-12 20:04:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:04:42,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:42,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971922890] [2021-08-12 20:04:42,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971922890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:42,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327397949] [2021-08-12 20:04:42,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:42,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 20:04:42,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:42,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 20:04:42,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:04:42,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327397949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:42,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:42,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-12 20:04:42,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285231136] [2021-08-12 20:04:42,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 20:04:42,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:42,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 20:04:42,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-12 20:04:42,925 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:43,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:43,265 INFO L93 Difference]: Finished difference Result 1005 states and 3240 transitions. [2021-08-12 20:04:43,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 20:04:43,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:43,269 INFO L225 Difference]: With dead ends: 1005 [2021-08-12 20:04:43,269 INFO L226 Difference]: Without dead ends: 929 [2021-08-12 20:04:43,269 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:04:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-12 20:04:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-08-12 20:04:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-08-12 20:04:43,347 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-08-12 20:04:43,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:43,347 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-08-12 20:04:43,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-08-12 20:04:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:43,349 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:43,349 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:43,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:43,566 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:43,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:43,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-08-12 20:04:43,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:43,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149510705] [2021-08-12 20:04:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:43,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:43,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149510705] [2021-08-12 20:04:43,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149510705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:43,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187616708] [2021-08-12 20:04:43,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:43,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:04:43,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:43,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:43,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:43,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187616708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:43,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:43,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 20:04:43,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108616298] [2021-08-12 20:04:43,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 20:04:43,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:43,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 20:04:43,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 20:04:43,689 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:44,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:44,495 INFO L93 Difference]: Finished difference Result 1580 states and 4827 transitions. [2021-08-12 20:04:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 20:04:44,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:44,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:44,500 INFO L225 Difference]: With dead ends: 1580 [2021-08-12 20:04:44,501 INFO L226 Difference]: Without dead ends: 1555 [2021-08-12 20:04:44,501 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:04:44,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-08-12 20:04:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-08-12 20:04:44,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-08-12 20:04:44,594 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-08-12 20:04:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:44,594 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-08-12 20:04:44,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-08-12 20:04:44,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:44,595 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:44,595 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:44,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 20:04:44,811 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:44,811 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-08-12 20:04:44,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:44,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700265272] [2021-08-12 20:04:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:44,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:44,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700265272] [2021-08-12 20:04:44,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700265272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:44,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107643287] [2021-08-12 20:04:44,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:44,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:04:44,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:44,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107643287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:44,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:44,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 20:04:44,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972788840] [2021-08-12 20:04:44,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 20:04:44,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:44,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 20:04:44,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 20:04:44,937 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:45,754 INFO L93 Difference]: Finished difference Result 1630 states and 4954 transitions. [2021-08-12 20:04:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 20:04:45,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:45,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:45,758 INFO L225 Difference]: With dead ends: 1630 [2021-08-12 20:04:45,758 INFO L226 Difference]: Without dead ends: 1605 [2021-08-12 20:04:45,758 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-08-12 20:04:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-12 20:04:45,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-08-12 20:04:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:45,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-08-12 20:04:45,844 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-08-12 20:04:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:45,844 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-08-12 20:04:45,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-08-12 20:04:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:45,846 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:45,846 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:46,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:46,065 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-08-12 20:04:46,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:46,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104077590] [2021-08-12 20:04:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:04:46,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:46,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104077590] [2021-08-12 20:04:46,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104077590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:46,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254401034] [2021-08-12 20:04:46,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:46,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:04:46,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:46,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:46,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:04:46,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254401034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:46,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:46,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 20:04:46,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546571584] [2021-08-12 20:04:46,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 20:04:46,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:46,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 20:04:46,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 20:04:46,151 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:46,852 INFO L93 Difference]: Finished difference Result 1549 states and 4744 transitions. [2021-08-12 20:04:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 20:04:46,852 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:46,855 INFO L225 Difference]: With dead ends: 1549 [2021-08-12 20:04:46,855 INFO L226 Difference]: Without dead ends: 1520 [2021-08-12 20:04:46,856 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-12 20:04:46,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-12 20:04:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-08-12 20:04:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-08-12 20:04:46,948 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-08-12 20:04:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:46,948 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-08-12 20:04:46,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-08-12 20:04:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:46,949 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:46,949 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:47,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-12 20:04:47,155 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-08-12 20:04:47,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:47,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235299071] [2021-08-12 20:04:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:47,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:47,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235299071] [2021-08-12 20:04:47,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235299071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:47,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291590057] [2021-08-12 20:04:47,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:47,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:04:47,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:47,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:47,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:47,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291590057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:47,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:47,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 20:04:47,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644715655] [2021-08-12 20:04:47,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 20:04:47,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:47,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 20:04:47,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 20:04:47,251 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:47,988 INFO L93 Difference]: Finished difference Result 1533 states and 4706 transitions. [2021-08-12 20:04:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:04:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:47,992 INFO L225 Difference]: With dead ends: 1533 [2021-08-12 20:04:47,992 INFO L226 Difference]: Without dead ends: 1496 [2021-08-12 20:04:47,992 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-12 20:04:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-12 20:04:48,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-08-12 20:04:48,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-08-12 20:04:48,079 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-08-12 20:04:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:48,079 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-08-12 20:04:48,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:48,079 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-08-12 20:04:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:48,080 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:48,080 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:48,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:48,281 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:48,281 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-08-12 20:04:48,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:48,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439249008] [2021-08-12 20:04:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:48,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:48,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439249008] [2021-08-12 20:04:48,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439249008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:48,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472964854] [2021-08-12 20:04:48,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:48,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:04:48,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:48,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:48,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:48,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472964854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:48,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:48,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:04:48,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232320847] [2021-08-12 20:04:48,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:48,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:48,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:48,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:48,415 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:49,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:49,746 INFO L93 Difference]: Finished difference Result 2437 states and 7628 transitions. [2021-08-12 20:04:49,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 20:04:49,747 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:49,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:49,751 INFO L225 Difference]: With dead ends: 2437 [2021-08-12 20:04:49,751 INFO L226 Difference]: Without dead ends: 2412 [2021-08-12 20:04:49,751 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 20:04:49,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-12 20:04:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-08-12 20:04:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-08-12 20:04:49,848 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-08-12 20:04:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:49,848 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-08-12 20:04:49,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-08-12 20:04:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:49,850 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:49,850 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:50,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 20:04:50,050 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:50,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:50,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-08-12 20:04:50,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:50,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667370787] [2021-08-12 20:04:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:50,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:50,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667370787] [2021-08-12 20:04:50,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667370787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:50,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137035448] [2021-08-12 20:04:50,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:50,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:50,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:50,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:50,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137035448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:50,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:50,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:04:50,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075669762] [2021-08-12 20:04:50,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:50,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:50,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:50,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:50,176 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:51,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:51,498 INFO L93 Difference]: Finished difference Result 2360 states and 7430 transitions. [2021-08-12 20:04:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 20:04:51,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:51,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:51,503 INFO L225 Difference]: With dead ends: 2360 [2021-08-12 20:04:51,503 INFO L226 Difference]: Without dead ends: 2335 [2021-08-12 20:04:51,504 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 20:04:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-12 20:04:51,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-08-12 20:04:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-12 20:04:51,608 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-12 20:04:51,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:51,608 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-12 20:04:51,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-12 20:04:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:51,609 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:51,609 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:51,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:51,810 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:51,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:51,810 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-08-12 20:04:51,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:51,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147691618] [2021-08-12 20:04:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:51,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:51,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147691618] [2021-08-12 20:04:51,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147691618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:51,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720697643] [2021-08-12 20:04:51,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:51,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:04:51,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:51,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:51,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:51,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720697643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:51,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:51,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:04:51,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194712021] [2021-08-12 20:04:51,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:04:51,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:51,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:04:51,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:04:51,973 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:53,370 INFO L93 Difference]: Finished difference Result 2310 states and 7184 transitions. [2021-08-12 20:04:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 20:04:53,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:53,376 INFO L225 Difference]: With dead ends: 2310 [2021-08-12 20:04:53,376 INFO L226 Difference]: Without dead ends: 2285 [2021-08-12 20:04:53,376 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 20:04:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-12 20:04:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-08-12 20:04:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:53,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-12 20:04:53,489 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-12 20:04:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:53,489 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-12 20:04:53,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-12 20:04:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:53,491 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:53,491 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:53,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 20:04:53,705 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-08-12 20:04:53,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:53,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421993516] [2021-08-12 20:04:53,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:53,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:53,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421993516] [2021-08-12 20:04:53,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421993516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:53,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431410157] [2021-08-12 20:04:53,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:53,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:04:53,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:53,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:53,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:53,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431410157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:53,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:53,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:04:53,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749345805] [2021-08-12 20:04:53,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:04:53,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:53,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:04:53,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:04:53,826 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:55,065 INFO L93 Difference]: Finished difference Result 2201 states and 6903 transitions. [2021-08-12 20:04:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:04:55,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:55,070 INFO L225 Difference]: With dead ends: 2201 [2021-08-12 20:04:55,070 INFO L226 Difference]: Without dead ends: 2172 [2021-08-12 20:04:55,071 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:04:55,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-08-12 20:04:55,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-08-12 20:04:55,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-12 20:04:55,175 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-12 20:04:55,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:55,175 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-12 20:04:55,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-12 20:04:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:55,177 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:55,177 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:55,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:55,377 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:55,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-08-12 20:04:55,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:55,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754828392] [2021-08-12 20:04:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:55,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:55,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754828392] [2021-08-12 20:04:55,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754828392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:55,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521593604] [2021-08-12 20:04:55,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:55,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:04:55,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:55,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:55,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:55,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521593604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:55,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:55,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:04:55,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850046808] [2021-08-12 20:04:55,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:55,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:55,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:55,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:55,503 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:56,759 INFO L93 Difference]: Finished difference Result 2224 states and 6951 transitions. [2021-08-12 20:04:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 20:04:56,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:56,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:56,763 INFO L225 Difference]: With dead ends: 2224 [2021-08-12 20:04:56,763 INFO L226 Difference]: Without dead ends: 2199 [2021-08-12 20:04:56,764 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 20:04:56,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-08-12 20:04:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-08-12 20:04:56,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-12 20:04:56,869 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-12 20:04:56,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:56,869 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-12 20:04:56,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-12 20:04:56,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:56,870 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:56,870 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:57,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 20:04:57,085 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:57,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-08-12 20:04:57,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:57,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064418576] [2021-08-12 20:04:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:57,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:57,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064418576] [2021-08-12 20:04:57,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064418576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:57,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119976819] [2021-08-12 20:04:57,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:57,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:04:57,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:57,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:57,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:57,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119976819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:57,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:57,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:04:57,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604052164] [2021-08-12 20:04:57,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:04:57,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:57,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:04:57,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:04:57,207 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:58,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:04:58,442 INFO L93 Difference]: Finished difference Result 2181 states and 6845 transitions. [2021-08-12 20:04:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 20:04:58,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:04:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:04:58,448 INFO L225 Difference]: With dead ends: 2181 [2021-08-12 20:04:58,448 INFO L226 Difference]: Without dead ends: 2152 [2021-08-12 20:04:58,449 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:04:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-08-12 20:04:58,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-08-12 20:04:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-12 20:04:58,574 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-12 20:04:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:04:58,574 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-12 20:04:58,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:04:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-12 20:04:58,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:04:58,576 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:04:58,576 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:04:58,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 20:04:58,776 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:04:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:04:58,777 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-08-12 20:04:58,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:04:58,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145646848] [2021-08-12 20:04:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:04:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:04:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:58,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:04:58,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145646848] [2021-08-12 20:04:58,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145646848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:58,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33470588] [2021-08-12 20:04:58,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:04:58,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:04:58,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:04:58,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:04:58,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:04:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:04:58,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33470588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:04:58,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:04:58,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:04:58,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047709282] [2021-08-12 20:04:58,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:04:58,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:04:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:04:58,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:04:58,890 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:00,193 INFO L93 Difference]: Finished difference Result 2122 states and 6453 transitions. [2021-08-12 20:05:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 20:05:00,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:05:00,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:00,197 INFO L225 Difference]: With dead ends: 2122 [2021-08-12 20:05:00,197 INFO L226 Difference]: Without dead ends: 2097 [2021-08-12 20:05:00,198 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 20:05:00,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-08-12 20:05:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-08-12 20:05:00,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-08-12 20:05:00,327 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-08-12 20:05:00,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:00,328 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-08-12 20:05:00,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-08-12 20:05:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:05:00,329 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:00,329 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:00,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 20:05:00,545 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-08-12 20:05:00,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:00,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664532003] [2021-08-12 20:05:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:00,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:00,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664532003] [2021-08-12 20:05:00,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664532003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:00,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902718535] [2021-08-12 20:05:00,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:00,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:05:00,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:00,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902718535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:00,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:00,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:05:00,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093888116] [2021-08-12 20:05:00,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:05:00,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:05:00,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:05:00,676 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:01,913 INFO L93 Difference]: Finished difference Result 1988 states and 6105 transitions. [2021-08-12 20:05:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 20:05:01,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:05:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:01,917 INFO L225 Difference]: With dead ends: 1988 [2021-08-12 20:05:01,917 INFO L226 Difference]: Without dead ends: 1959 [2021-08-12 20:05:01,918 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-12 20:05:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-12 20:05:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-08-12 20:05:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-08-12 20:05:02,078 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-08-12 20:05:02,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:02,078 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-08-12 20:05:02,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-08-12 20:05:02,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:05:02,080 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:02,080 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:02,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 20:05:02,281 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-08-12 20:05:02,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:02,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593638615] [2021-08-12 20:05:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:02,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:02,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593638615] [2021-08-12 20:05:02,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593638615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:02,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408887944] [2021-08-12 20:05:02,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:02,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:05:02,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:02,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:05:02,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:02,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408887944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:02,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:02,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:05:02,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682902992] [2021-08-12 20:05:02,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:05:02,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:02,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:05:02,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:05:02,403 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:03,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:03,424 INFO L93 Difference]: Finished difference Result 1753 states and 5544 transitions. [2021-08-12 20:05:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:05:03,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:05:03,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:03,428 INFO L225 Difference]: With dead ends: 1753 [2021-08-12 20:05:03,428 INFO L226 Difference]: Without dead ends: 1716 [2021-08-12 20:05:03,428 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-12 20:05:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-08-12 20:05:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-08-12 20:05:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-08-12 20:05:03,554 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-08-12 20:05:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:03,554 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-08-12 20:05:03,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-08-12 20:05:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:05:03,556 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:03,556 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:03,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:03,757 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:03,757 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-08-12 20:05:03,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:03,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64098571] [2021-08-12 20:05:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:03,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:03,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64098571] [2021-08-12 20:05:03,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64098571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:03,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908878237] [2021-08-12 20:05:03,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:03,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:05:03,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:05:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:03,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908878237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:03,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:03,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:05:03,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367154175] [2021-08-12 20:05:03,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:05:03,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:03,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:05:03,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:05:03,892 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:05,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:05,103 INFO L93 Difference]: Finished difference Result 1846 states and 5777 transitions. [2021-08-12 20:05:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 20:05:05,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:05:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:05,107 INFO L225 Difference]: With dead ends: 1846 [2021-08-12 20:05:05,107 INFO L226 Difference]: Without dead ends: 1821 [2021-08-12 20:05:05,108 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:05:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-08-12 20:05:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-08-12 20:05:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-08-12 20:05:05,247 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-08-12 20:05:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:05,248 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-08-12 20:05:05,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-08-12 20:05:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:05:05,249 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:05,249 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:05,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-12 20:05:05,473 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:05,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-08-12 20:05:05,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:05,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838614398] [2021-08-12 20:05:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:05,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:05,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838614398] [2021-08-12 20:05:05,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838614398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:05,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78391005] [2021-08-12 20:05:05,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 20:05:05,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:05:05,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:05,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:05:05,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:05,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78391005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:05,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:05,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 20:05:05,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928923691] [2021-08-12 20:05:05,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:05:05,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:05,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:05:05,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:05:05,614 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:06,771 INFO L93 Difference]: Finished difference Result 1815 states and 5702 transitions. [2021-08-12 20:05:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:05:06,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:05:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:06,775 INFO L225 Difference]: With dead ends: 1815 [2021-08-12 20:05:06,775 INFO L226 Difference]: Without dead ends: 1786 [2021-08-12 20:05:06,776 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-12 20:05:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-08-12 20:05:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-08-12 20:05:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-08-12 20:05:06,912 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-08-12 20:05:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:06,912 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-08-12 20:05:06,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-08-12 20:05:06,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 20:05:06,914 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:06,914 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:07,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-12 20:05:07,115 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:07,115 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-08-12 20:05:07,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:07,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908684483] [2021-08-12 20:05:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:07,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:07,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908684483] [2021-08-12 20:05:07,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908684483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:07,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721981394] [2021-08-12 20:05:07,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:07,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:05:07,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:07,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:05:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:07,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721981394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:07,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:07,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 20:05:07,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133076191] [2021-08-12 20:05:07,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 20:05:07,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:07,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 20:05:07,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-12 20:05:07,232 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:08,212 INFO L93 Difference]: Finished difference Result 1674 states and 5382 transitions. [2021-08-12 20:05:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:05:08,213 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 20:05:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:08,216 INFO L225 Difference]: With dead ends: 1674 [2021-08-12 20:05:08,216 INFO L226 Difference]: Without dead ends: 1637 [2021-08-12 20:05:08,217 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:05:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-08-12 20:05:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-08-12 20:05:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-08-12 20:05:08,360 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-08-12 20:05:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:08,360 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-08-12 20:05:08,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:08,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-08-12 20:05:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:08,363 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:08,363 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:08,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:08,579 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:08,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:08,580 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-08-12 20:05:08,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:08,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048627911] [2021-08-12 20:05:08,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:08,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:08,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048627911] [2021-08-12 20:05:08,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048627911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:08,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419353270] [2021-08-12 20:05:08,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:08,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:05:08,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:08,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:05:08,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:08,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:08,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:08,988 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 20 treesize of output 12 [2021-08-12 20:05:08,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:08,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:08,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:08,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:05:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:09,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419353270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:09,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:09,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:05:09,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836961994] [2021-08-12 20:05:09,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:05:09,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:09,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:05:09,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:05:09,011 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:10,212 INFO L93 Difference]: Finished difference Result 1519 states and 4957 transitions. [2021-08-12 20:05:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:05:10,213 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:10,216 INFO L225 Difference]: With dead ends: 1519 [2021-08-12 20:05:10,217 INFO L226 Difference]: Without dead ends: 1502 [2021-08-12 20:05:10,217 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 549.1ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-08-12 20:05:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-08-12 20:05:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-08-12 20:05:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-08-12 20:05:10,397 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-08-12 20:05:10,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:10,397 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-08-12 20:05:10,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:10,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-08-12 20:05:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:10,399 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:10,399 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:10,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-12 20:05:10,599 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:10,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-08-12 20:05:10,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:10,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908154064] [2021-08-12 20:05:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:10,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:10,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908154064] [2021-08-12 20:05:10,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908154064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:10,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772439874] [2021-08-12 20:05:10,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:10,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:05:10,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:10,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:05:10,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:10,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:10,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:10,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:05:10,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:11,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:11,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:11,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:05:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:11,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772439874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:11,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:11,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:05:11,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610387942] [2021-08-12 20:05:11,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:05:11,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:11,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:05:11,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:05:11,025 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:12,292 INFO L93 Difference]: Finished difference Result 1497 states and 4901 transitions. [2021-08-12 20:05:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:05:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:12,296 INFO L225 Difference]: With dead ends: 1497 [2021-08-12 20:05:12,297 INFO L226 Difference]: Without dead ends: 1480 [2021-08-12 20:05:12,297 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 534.4ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-08-12 20:05:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-08-12 20:05:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-08-12 20:05:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:12,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-08-12 20:05:12,487 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-08-12 20:05:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:12,487 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-08-12 20:05:12,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-08-12 20:05:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:12,490 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:12,490 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:12,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:12,709 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:12,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-08-12 20:05:12,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:12,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764699299] [2021-08-12 20:05:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:13,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:13,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764699299] [2021-08-12 20:05:13,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764699299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:13,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37688055] [2021-08-12 20:05:13,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:13,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:05:13,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:13,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:05:13,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:13,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:13,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:13,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:13,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:13,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:05:13,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:13,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:13,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:13,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:05:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:13,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37688055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:13,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:13,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-12 20:05:13,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197817185] [2021-08-12 20:05:13,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:05:13,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:13,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:05:13,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:05:13,316 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:16,164 INFO L93 Difference]: Finished difference Result 1660 states and 5347 transitions. [2021-08-12 20:05:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 20:05:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:16,168 INFO L225 Difference]: With dead ends: 1660 [2021-08-12 20:05:16,168 INFO L226 Difference]: Without dead ends: 1643 [2021-08-12 20:05:16,168 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1981.4ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 20:05:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-08-12 20:05:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1180. [2021-08-12 20:05:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-08-12 20:05:16,385 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-08-12 20:05:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:16,385 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-08-12 20:05:16,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-08-12 20:05:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:16,387 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:16,387 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:16,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-12 20:05:16,588 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:16,588 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-08-12 20:05:16,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:16,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429754180] [2021-08-12 20:05:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:16,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:16,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429754180] [2021-08-12 20:05:16,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429754180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:16,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154132203] [2021-08-12 20:05:16,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:16,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:05:16,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:16,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:05:16,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:17,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:17,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:17,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:05:17,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:17,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:17,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:17,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:05:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:17,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154132203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:17,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:17,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:05:17,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698972000] [2021-08-12 20:05:17,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:05:17,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:05:17,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:05:17,072 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:18,861 INFO L93 Difference]: Finished difference Result 1643 states and 5249 transitions. [2021-08-12 20:05:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:05:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:18,864 INFO L225 Difference]: With dead ends: 1643 [2021-08-12 20:05:18,864 INFO L226 Difference]: Without dead ends: 1626 [2021-08-12 20:05:18,865 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 849.7ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:05:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-08-12 20:05:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1189. [2021-08-12 20:05:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-08-12 20:05:19,062 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-08-12 20:05:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:19,062 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-08-12 20:05:19,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-08-12 20:05:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:19,064 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:19,064 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:19,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:19,275 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:19,275 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-08-12 20:05:19,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:19,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668304801] [2021-08-12 20:05:19,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:19,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:19,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668304801] [2021-08-12 20:05:19,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668304801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:19,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135395389] [2021-08-12 20:05:19,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:05:19,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:19,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:19,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:19,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:19,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:05:19,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:19,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:19,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:19,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:05:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:19,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135395389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:19,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:19,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-12 20:05:19,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353938613] [2021-08-12 20:05:19,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:05:19,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:19,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:05:19,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:05:19,748 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:23,057 INFO L93 Difference]: Finished difference Result 1882 states and 5990 transitions. [2021-08-12 20:05:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 20:05:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:23,061 INFO L225 Difference]: With dead ends: 1882 [2021-08-12 20:05:23,061 INFO L226 Difference]: Without dead ends: 1865 [2021-08-12 20:05:23,062 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1945.8ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 20:05:23,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-08-12 20:05:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1201. [2021-08-12 20:05:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-08-12 20:05:23,230 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-08-12 20:05:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:23,230 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-08-12 20:05:23,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-08-12 20:05:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:23,232 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:23,232 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:23,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 20:05:23,433 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:23,433 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-08-12 20:05:23,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:23,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760220500] [2021-08-12 20:05:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:23,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:23,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760220500] [2021-08-12 20:05:23,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760220500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:23,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442941651] [2021-08-12 20:05:23,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:23,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:05:23,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:05:23,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:23,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:23,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:23,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:23,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-12 20:05:23,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:05:23,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:23,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:23,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:38 [2021-08-12 20:05:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:24,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442941651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:24,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:24,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-12 20:05:24,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422889492] [2021-08-12 20:05:24,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 20:05:24,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:24,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 20:05:24,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-12 20:05:24,006 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:26,841 INFO L93 Difference]: Finished difference Result 2086 states and 6625 transitions. [2021-08-12 20:05:26,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 20:05:26,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:26,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:26,846 INFO L225 Difference]: With dead ends: 2086 [2021-08-12 20:05:26,846 INFO L226 Difference]: Without dead ends: 2069 [2021-08-12 20:05:26,847 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1400.0ms TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 20:05:26,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-08-12 20:05:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1211. [2021-08-12 20:05:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.3446280991735535) internal successors, (4047), 1210 states have internal predecessors, (4047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4047 transitions. [2021-08-12 20:05:27,086 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4047 transitions. Word has length 26 [2021-08-12 20:05:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:27,086 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 4047 transitions. [2021-08-12 20:05:27,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4047 transitions. [2021-08-12 20:05:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:27,088 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:27,088 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:27,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 20:05:27,289 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:27,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-08-12 20:05:27,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:27,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746714357] [2021-08-12 20:05:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:27,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:27,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746714357] [2021-08-12 20:05:27,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746714357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:27,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373579535] [2021-08-12 20:05:27,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:27,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:05:27,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:27,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:27,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:27,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:05:27,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:27,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:27,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:27,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:05:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:27,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373579535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:27,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:27,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:05:27,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953086983] [2021-08-12 20:05:27,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:05:27,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:27,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:05:27,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:05:27,683 INFO L87 Difference]: Start difference. First operand 1211 states and 4047 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:29,041 INFO L93 Difference]: Finished difference Result 1616 states and 5258 transitions. [2021-08-12 20:05:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 20:05:29,042 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:29,045 INFO L225 Difference]: With dead ends: 1616 [2021-08-12 20:05:29,045 INFO L226 Difference]: Without dead ends: 1599 [2021-08-12 20:05:29,045 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 570.2ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-08-12 20:05:29,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-08-12 20:05:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1222. [2021-08-12 20:05:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.3415233415233416) internal successors, (4080), 1221 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4080 transitions. [2021-08-12 20:05:29,228 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4080 transitions. Word has length 26 [2021-08-12 20:05:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:29,228 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4080 transitions. [2021-08-12 20:05:29,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4080 transitions. [2021-08-12 20:05:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:29,230 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:29,230 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:29,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 20:05:29,444 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:29,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:29,444 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-08-12 20:05:29,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:29,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714172560] [2021-08-12 20:05:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:29,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:29,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714172560] [2021-08-12 20:05:29,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714172560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:29,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112589681] [2021-08-12 20:05:29,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:29,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:05:29,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:29,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:05:29,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:29,837 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-12 20:05:29,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-08-12 20:05:29,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:29,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:29,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:29,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:105 [2021-08-12 20:05:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:29,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112589681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:29,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:29,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 20:05:29,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342059486] [2021-08-12 20:05:29,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:05:29,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:05:29,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:05:29,972 INFO L87 Difference]: Start difference. First operand 1222 states and 4080 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:32,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:32,920 INFO L93 Difference]: Finished difference Result 1879 states and 5974 transitions. [2021-08-12 20:05:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 20:05:32,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:32,927 INFO L225 Difference]: With dead ends: 1879 [2021-08-12 20:05:32,927 INFO L226 Difference]: Without dead ends: 1862 [2021-08-12 20:05:32,928 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1520.4ms TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 20:05:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-08-12 20:05:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1233. [2021-08-12 20:05:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 3.3506493506493507) internal successors, (4128), 1232 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4128 transitions. [2021-08-12 20:05:33,133 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4128 transitions. Word has length 26 [2021-08-12 20:05:33,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:33,134 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 4128 transitions. [2021-08-12 20:05:33,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4128 transitions. [2021-08-12 20:05:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:33,136 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:33,136 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:33,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 20:05:33,336 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:33,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-08-12 20:05:33,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:33,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896597242] [2021-08-12 20:05:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:33,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:33,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896597242] [2021-08-12 20:05:33,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896597242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:33,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743315159] [2021-08-12 20:05:33,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:33,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:05:33,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:33,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:05:33,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:33,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:33,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:33,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:05:33,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:33,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:33,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-08-12 20:05:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:33,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743315159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:33,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:33,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:05:33,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647264399] [2021-08-12 20:05:33,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:05:33,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:33,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:05:33,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:05:33,782 INFO L87 Difference]: Start difference. First operand 1233 states and 4128 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:35,645 INFO L93 Difference]: Finished difference Result 1870 states and 6063 transitions. [2021-08-12 20:05:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:05:35,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:35,649 INFO L225 Difference]: With dead ends: 1870 [2021-08-12 20:05:35,649 INFO L226 Difference]: Without dead ends: 1853 [2021-08-12 20:05:35,650 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 720.3ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-08-12 20:05:35,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-08-12 20:05:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1242. [2021-08-12 20:05:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.35535858178888) internal successors, (4164), 1241 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4164 transitions. [2021-08-12 20:05:35,860 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4164 transitions. Word has length 26 [2021-08-12 20:05:35,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:35,860 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4164 transitions. [2021-08-12 20:05:35,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:35,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4164 transitions. [2021-08-12 20:05:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:35,862 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:35,862 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:36,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:36,063 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:36,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:36,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-08-12 20:05:36,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:36,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290613694] [2021-08-12 20:05:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:36,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:36,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290613694] [2021-08-12 20:05:36,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290613694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:36,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310687962] [2021-08-12 20:05:36,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:36,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:05:36,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:05:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:36,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:36,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:36,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:05:36,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:36,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:36,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:36,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:05:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:36,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310687962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:36,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:36,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-12 20:05:36,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054885933] [2021-08-12 20:05:36,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 20:05:36,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:36,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 20:05:36,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:05:36,409 INFO L87 Difference]: Start difference. First operand 1242 states and 4164 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:37,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:37,686 INFO L93 Difference]: Finished difference Result 1427 states and 4678 transitions. [2021-08-12 20:05:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:05:37,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:37,690 INFO L225 Difference]: With dead ends: 1427 [2021-08-12 20:05:37,690 INFO L226 Difference]: Without dead ends: 1410 [2021-08-12 20:05:37,692 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:05:37,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-08-12 20:05:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1238. [2021-08-12 20:05:37,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.354890864995958) internal successors, (4150), 1237 states have internal predecessors, (4150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4150 transitions. [2021-08-12 20:05:37,903 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4150 transitions. Word has length 26 [2021-08-12 20:05:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:37,903 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4150 transitions. [2021-08-12 20:05:37,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:37,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4150 transitions. [2021-08-12 20:05:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:37,905 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:37,905 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:38,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:38,106 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:38,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:38,106 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-08-12 20:05:38,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:38,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364879472] [2021-08-12 20:05:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:38,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:38,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364879472] [2021-08-12 20:05:38,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364879472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:38,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289178452] [2021-08-12 20:05:38,264 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:38,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:05:38,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:38,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:05:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:38,454 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:05:38,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-08-12 20:05:38,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:38,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:38,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:38,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-08-12 20:05:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:38,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289178452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:38,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:38,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 20:05:38,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648871635] [2021-08-12 20:05:38,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:05:38,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:38,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:05:38,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:05:38,509 INFO L87 Difference]: Start difference. First operand 1238 states and 4150 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:41,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:41,104 INFO L93 Difference]: Finished difference Result 2070 states and 6703 transitions. [2021-08-12 20:05:41,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 20:05:41,104 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:41,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:41,109 INFO L225 Difference]: With dead ends: 2070 [2021-08-12 20:05:41,109 INFO L226 Difference]: Without dead ends: 2053 [2021-08-12 20:05:41,109 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1117.7ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 20:05:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-08-12 20:05:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1241. [2021-08-12 20:05:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.3588709677419355) internal successors, (4165), 1240 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:41,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4165 transitions. [2021-08-12 20:05:41,319 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4165 transitions. Word has length 26 [2021-08-12 20:05:41,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:41,319 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4165 transitions. [2021-08-12 20:05:41,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4165 transitions. [2021-08-12 20:05:41,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:41,321 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:41,322 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:41,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-12 20:05:41,522 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:41,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:41,522 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-08-12 20:05:41,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:41,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588609355] [2021-08-12 20:05:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:41,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:41,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588609355] [2021-08-12 20:05:41,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588609355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:41,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173428129] [2021-08-12 20:05:41,727 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:41,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:05:41,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:41,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:05:41,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:41,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:41,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:41,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:41,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:41,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-08-12 20:05:41,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:05:41,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:41,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:41,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-08-12 20:05:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:41,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173428129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:41,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:41,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:05:41,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108904005] [2021-08-12 20:05:41,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:05:41,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:41,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:05:41,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:05:41,943 INFO L87 Difference]: Start difference. First operand 1241 states and 4165 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:44,655 INFO L93 Difference]: Finished difference Result 1839 states and 5988 transitions. [2021-08-12 20:05:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 20:05:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:44,660 INFO L225 Difference]: With dead ends: 1839 [2021-08-12 20:05:44,660 INFO L226 Difference]: Without dead ends: 1822 [2021-08-12 20:05:44,661 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1186.5ms TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 20:05:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-08-12 20:05:44,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1244. [2021-08-12 20:05:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.360418342719228) internal successors, (4177), 1243 states have internal predecessors, (4177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4177 transitions. [2021-08-12 20:05:44,900 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4177 transitions. Word has length 26 [2021-08-12 20:05:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:44,900 INFO L482 AbstractCegarLoop]: Abstraction has 1244 states and 4177 transitions. [2021-08-12 20:05:44,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4177 transitions. [2021-08-12 20:05:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:44,902 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:44,902 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:45,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-12 20:05:45,103 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:45,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1212092298, now seen corresponding path program 13 times [2021-08-12 20:05:45,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:45,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615242451] [2021-08-12 20:05:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:45,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:45,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615242451] [2021-08-12 20:05:45,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615242451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:45,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873203006] [2021-08-12 20:05:45,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:45,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:05:45,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:45,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:45,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:45,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:05:45,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:45,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:45,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:45,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:05:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:45,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873203006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:45,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:45,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:05:45,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413404120] [2021-08-12 20:05:45,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:05:45,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:45,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:05:45,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:05:45,558 INFO L87 Difference]: Start difference. First operand 1244 states and 4177 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:47,894 INFO L93 Difference]: Finished difference Result 1883 states and 6021 transitions. [2021-08-12 20:05:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:05:47,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:47,898 INFO L225 Difference]: With dead ends: 1883 [2021-08-12 20:05:47,898 INFO L226 Difference]: Without dead ends: 1866 [2021-08-12 20:05:47,898 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 808.5ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:05:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-08-12 20:05:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1246. [2021-08-12 20:05:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-08-12 20:05:48,115 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-08-12 20:05:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:48,115 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-08-12 20:05:48,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-08-12 20:05:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:48,117 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:48,117 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:48,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:48,333 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-08-12 20:05:48,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:48,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796879443] [2021-08-12 20:05:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:48,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:48,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796879443] [2021-08-12 20:05:48,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796879443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:48,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309136649] [2021-08-12 20:05:48,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:48,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:05:48,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:48,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:05:48,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:48,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:48,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:48,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:48,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:05:48,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:05:48,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:48,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:48,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:48,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:05:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:48,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309136649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:48,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:48,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-12 20:05:48,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705840344] [2021-08-12 20:05:48,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:05:48,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:48,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:05:48,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:05:48,751 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:53,221 INFO L93 Difference]: Finished difference Result 2940 states and 9142 transitions. [2021-08-12 20:05:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 20:05:53,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:53,228 INFO L225 Difference]: With dead ends: 2940 [2021-08-12 20:05:53,228 INFO L226 Difference]: Without dead ends: 2893 [2021-08-12 20:05:53,229 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1846.1ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-08-12 20:05:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-08-12 20:05:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1292. [2021-08-12 20:05:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-08-12 20:05:53,544 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-08-12 20:05:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:53,544 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-08-12 20:05:53,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:53,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-08-12 20:05:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:53,547 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:53,547 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:53,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:53,748 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:53,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1493004622, now seen corresponding path program 14 times [2021-08-12 20:05:53,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:53,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133132637] [2021-08-12 20:05:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:53,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:53,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133132637] [2021-08-12 20:05:53,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133132637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:53,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992645713] [2021-08-12 20:05:53,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:54,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:05:54,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:05:54,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:05:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:54,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:54,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:54,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-08-12 20:05:54,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:05:54,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:54,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:54,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:120 [2021-08-12 20:05:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:54,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992645713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:54,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:54,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 20:05:54,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611225875] [2021-08-12 20:05:54,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:05:54,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:54,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:05:54,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:05:54,383 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:59,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:05:59,009 INFO L93 Difference]: Finished difference Result 2345 states and 7348 transitions. [2021-08-12 20:05:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 20:05:59,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:05:59,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:05:59,015 INFO L225 Difference]: With dead ends: 2345 [2021-08-12 20:05:59,015 INFO L226 Difference]: Without dead ends: 2313 [2021-08-12 20:05:59,016 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2108.4ms TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 20:05:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-08-12 20:05:59,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1291. [2021-08-12 20:05:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.372093023255814) internal successors, (4350), 1290 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:59,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 4350 transitions. [2021-08-12 20:05:59,285 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 4350 transitions. Word has length 26 [2021-08-12 20:05:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:05:59,285 INFO L482 AbstractCegarLoop]: Abstraction has 1291 states and 4350 transitions. [2021-08-12 20:05:59,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:05:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 4350 transitions. [2021-08-12 20:05:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:05:59,287 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:05:59,287 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:05:59,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-08-12 20:05:59,488 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:05:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:05:59,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1417319858, now seen corresponding path program 15 times [2021-08-12 20:05:59,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:05:59,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153910683] [2021-08-12 20:05:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:05:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:05:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:59,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:05:59,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153910683] [2021-08-12 20:05:59,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153910683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:59,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634427196] [2021-08-12 20:05:59,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 20:05:59,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:05:59,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:05:59,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 20:05:59,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:05:59,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:05:59,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:59,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-08-12 20:05:59,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:05:59,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:05:59,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:05:59,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-08-12 20:05:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:05:59,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634427196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:05:59,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:05:59,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-08-12 20:05:59,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598691561] [2021-08-12 20:05:59,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:05:59,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:05:59,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:05:59,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:05:59,913 INFO L87 Difference]: Start difference. First operand 1291 states and 4350 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:03,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:03,771 INFO L93 Difference]: Finished difference Result 2293 states and 7287 transitions. [2021-08-12 20:06:03,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 20:06:03,771 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:03,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:03,777 INFO L225 Difference]: With dead ends: 2293 [2021-08-12 20:06:03,777 INFO L226 Difference]: Without dead ends: 2276 [2021-08-12 20:06:03,778 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1456.1ms TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 20:06:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-08-12 20:06:04,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1288. [2021-08-12 20:06:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.370629370629371) internal successors, (4338), 1287 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4338 transitions. [2021-08-12 20:06:04,068 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4338 transitions. Word has length 26 [2021-08-12 20:06:04,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:04,068 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4338 transitions. [2021-08-12 20:06:04,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4338 transitions. [2021-08-12 20:06:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:04,070 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:04,070 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:04,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:04,271 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:04,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-08-12 20:06:04,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:04,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305391172] [2021-08-12 20:06:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:04,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:04,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305391172] [2021-08-12 20:06:04,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305391172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:04,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347993434] [2021-08-12 20:06:04,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:04,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:06:04,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:04,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:06:04,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:04,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:04,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:04,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:04,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:04,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:06:04,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:04,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:04,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:04,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:06:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:04,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347993434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:04,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:04,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-12 20:06:04,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279987877] [2021-08-12 20:06:04,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:06:04,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:04,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:06:04,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:06:04,695 INFO L87 Difference]: Start difference. First operand 1288 states and 4338 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:08,981 INFO L93 Difference]: Finished difference Result 2762 states and 8716 transitions. [2021-08-12 20:06:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 20:06:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:08,987 INFO L225 Difference]: With dead ends: 2762 [2021-08-12 20:06:08,987 INFO L226 Difference]: Without dead ends: 2715 [2021-08-12 20:06:08,988 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1649.9ms TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 20:06:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-08-12 20:06:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 1284. [2021-08-12 20:06:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.3795791114575215) internal successors, (4336), 1283 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4336 transitions. [2021-08-12 20:06:09,267 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4336 transitions. Word has length 26 [2021-08-12 20:06:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:09,268 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4336 transitions. [2021-08-12 20:06:09,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:09,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4336 transitions. [2021-08-12 20:06:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:09,270 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:09,270 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:09,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:09,472 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:09,472 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-08-12 20:06:09,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:09,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281683001] [2021-08-12 20:06:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:09,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:09,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281683001] [2021-08-12 20:06:09,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281683001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:09,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316353327] [2021-08-12 20:06:09,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:09,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:06:09,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:06:09,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:09,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:09,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:09,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:09,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-08-12 20:06:09,898 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:06:09,917 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-08-12 20:06:09,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:09,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-08-12 20:06:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:09,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316353327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:09,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:09,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-12 20:06:09,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904768933] [2021-08-12 20:06:09,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:06:09,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:09,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:06:09,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:06:09,984 INFO L87 Difference]: Start difference. First operand 1284 states and 4336 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:15,355 INFO L93 Difference]: Finished difference Result 3081 states and 9646 transitions. [2021-08-12 20:06:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 20:06:15,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:15,363 INFO L225 Difference]: With dead ends: 3081 [2021-08-12 20:06:15,363 INFO L226 Difference]: Without dead ends: 3034 [2021-08-12 20:06:15,364 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2229.8ms TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2021-08-12 20:06:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-08-12 20:06:15,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 1288. [2021-08-12 20:06:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3853923853923855) internal successors, (4357), 1287 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4357 transitions. [2021-08-12 20:06:15,682 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4357 transitions. Word has length 26 [2021-08-12 20:06:15,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:15,682 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4357 transitions. [2021-08-12 20:06:15,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4357 transitions. [2021-08-12 20:06:15,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:15,684 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:15,684 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:15,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:15,893 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:15,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:15,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1882815202, now seen corresponding path program 16 times [2021-08-12 20:06:15,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:15,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241470410] [2021-08-12 20:06:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:16,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:16,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241470410] [2021-08-12 20:06:16,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241470410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:16,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411604169] [2021-08-12 20:06:16,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:16,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:06:16,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:16,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:06:16,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:16,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:16,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:16,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:06:16,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:16,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:16,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:16,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:06:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:16,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411604169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:16,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:16,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:06:16,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736337808] [2021-08-12 20:06:16,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:06:16,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:16,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:06:16,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:06:16,378 INFO L87 Difference]: Start difference. First operand 1288 states and 4357 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:17,992 INFO L93 Difference]: Finished difference Result 1652 states and 5459 transitions. [2021-08-12 20:06:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:06:17,992 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:17,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:17,996 INFO L225 Difference]: With dead ends: 1652 [2021-08-12 20:06:17,996 INFO L226 Difference]: Without dead ends: 1635 [2021-08-12 20:06:17,996 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 612.2ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:06:17,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-08-12 20:06:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1305. [2021-08-12 20:06:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 3.3803680981595092) internal successors, (4408), 1304 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 4408 transitions. [2021-08-12 20:06:18,248 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 4408 transitions. Word has length 26 [2021-08-12 20:06:18,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:18,248 INFO L482 AbstractCegarLoop]: Abstraction has 1305 states and 4408 transitions. [2021-08-12 20:06:18,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:18,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 4408 transitions. [2021-08-12 20:06:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:18,250 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:18,250 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:18,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:18,465 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:18,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1110153644, now seen corresponding path program 17 times [2021-08-12 20:06:18,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:18,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704217323] [2021-08-12 20:06:18,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:18,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:18,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704217323] [2021-08-12 20:06:18,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704217323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:18,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423603618] [2021-08-12 20:06:18,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:18,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:06:18,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:18,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:06:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:18,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:18,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:06:18,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:18,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:18,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:18,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:06:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:18,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423603618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:18,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:18,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 20:06:18,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477239727] [2021-08-12 20:06:18,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:06:18,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:18,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:06:18,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:06:18,912 INFO L87 Difference]: Start difference. First operand 1305 states and 4408 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:20,811 INFO L93 Difference]: Finished difference Result 1639 states and 5417 transitions. [2021-08-12 20:06:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 20:06:20,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:20,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:20,816 INFO L225 Difference]: With dead ends: 1639 [2021-08-12 20:06:20,816 INFO L226 Difference]: Without dead ends: 1622 [2021-08-12 20:06:20,816 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 713.1ms TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2021-08-12 20:06:20,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-08-12 20:06:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1297. [2021-08-12 20:06:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-08-12 20:06:21,081 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-08-12 20:06:21,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:21,081 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-08-12 20:06:21,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:21,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-08-12 20:06:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:21,083 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:21,083 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:21,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-08-12 20:06:21,284 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:21,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1553655630, now seen corresponding path program 18 times [2021-08-12 20:06:21,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:21,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302105001] [2021-08-12 20:06:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:21,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:21,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302105001] [2021-08-12 20:06:21,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302105001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:21,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541238290] [2021-08-12 20:06:21,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:21,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:06:21,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:21,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:06:21,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:21,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:21,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:06:21,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:21,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:21,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:21,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-08-12 20:06:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:21,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541238290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:21,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:21,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:06:21,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711479716] [2021-08-12 20:06:21,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:06:21,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:21,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:06:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:06:21,738 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:24,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:24,070 INFO L93 Difference]: Finished difference Result 1882 states and 6177 transitions. [2021-08-12 20:06:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 20:06:24,070 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:24,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:24,075 INFO L225 Difference]: With dead ends: 1882 [2021-08-12 20:06:24,075 INFO L226 Difference]: Without dead ends: 1865 [2021-08-12 20:06:24,076 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 712.0ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:06:24,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-08-12 20:06:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1306. [2021-08-12 20:06:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.389272030651341) internal successors, (4423), 1305 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4423 transitions. [2021-08-12 20:06:24,356 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4423 transitions. Word has length 26 [2021-08-12 20:06:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:24,356 INFO L482 AbstractCegarLoop]: Abstraction has 1306 states and 4423 transitions. [2021-08-12 20:06:24,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4423 transitions. [2021-08-12 20:06:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:24,358 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:24,359 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:24,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:24,559 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:24,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 19 times [2021-08-12 20:06:24,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:24,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30690883] [2021-08-12 20:06:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:24,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:24,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30690883] [2021-08-12 20:06:24,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30690883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:24,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714609644] [2021-08-12 20:06:24,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:24,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:06:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:24,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:24,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:24,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:06:24,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:24,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:24,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:24,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:06:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:24,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714609644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:24,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:24,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-12 20:06:24,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794918798] [2021-08-12 20:06:24,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 20:06:24,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:24,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 20:06:24,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:06:24,993 INFO L87 Difference]: Start difference. First operand 1306 states and 4423 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:26,341 INFO L93 Difference]: Finished difference Result 1474 states and 4887 transitions. [2021-08-12 20:06:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 20:06:26,341 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:26,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:26,345 INFO L225 Difference]: With dead ends: 1474 [2021-08-12 20:06:26,345 INFO L226 Difference]: Without dead ends: 1457 [2021-08-12 20:06:26,345 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:06:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2021-08-12 20:06:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1300. [2021-08-12 20:06:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 3.3887605850654348) internal successors, (4402), 1299 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 4402 transitions. [2021-08-12 20:06:26,615 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 4402 transitions. Word has length 26 [2021-08-12 20:06:26,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:26,615 INFO L482 AbstractCegarLoop]: Abstraction has 1300 states and 4402 transitions. [2021-08-12 20:06:26,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 4402 transitions. [2021-08-12 20:06:26,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:26,617 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:26,617 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:26,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-12 20:06:26,818 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:26,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:26,818 INFO L82 PathProgramCache]: Analyzing trace with hash 505986546, now seen corresponding path program 20 times [2021-08-12 20:06:26,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:26,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24555376] [2021-08-12 20:06:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:27,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:27,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24555376] [2021-08-12 20:06:27,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24555376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:27,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250278528] [2021-08-12 20:06:27,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:27,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:06:27,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:27,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:06:27,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:27,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:27,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:27,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-08-12 20:06:27,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:27,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:27,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:06:27,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-08-12 20:06:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:27,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250278528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:27,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:27,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:06:27,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457779449] [2021-08-12 20:06:27,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:06:27,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:27,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:06:27,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:06:27,296 INFO L87 Difference]: Start difference. First operand 1300 states and 4402 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:30,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:30,044 INFO L93 Difference]: Finished difference Result 2109 states and 6898 transitions. [2021-08-12 20:06:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 20:06:30,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:30,050 INFO L225 Difference]: With dead ends: 2109 [2021-08-12 20:06:30,050 INFO L226 Difference]: Without dead ends: 2092 [2021-08-12 20:06:30,051 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1014.2ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 20:06:30,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-08-12 20:06:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1297. [2021-08-12 20:06:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-08-12 20:06:30,393 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-08-12 20:06:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:30,394 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-08-12 20:06:30,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-08-12 20:06:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:30,396 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:30,396 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:30,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:30,597 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:30,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1484642536, now seen corresponding path program 21 times [2021-08-12 20:06:30,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:30,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936385780] [2021-08-12 20:06:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:30,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:30,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936385780] [2021-08-12 20:06:30,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936385780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:30,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063152465] [2021-08-12 20:06:30,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:30,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:06:30,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:30,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 20:06:30,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:31,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:31,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:31,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:06:31,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:31,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:31,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:31,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:06:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:31,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063152465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:31,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:31,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-08-12 20:06:31,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033497287] [2021-08-12 20:06:31,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:06:31,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:31,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:06:31,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:06:31,106 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:34,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:34,072 INFO L93 Difference]: Finished difference Result 1855 states and 6050 transitions. [2021-08-12 20:06:34,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 20:06:34,073 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:34,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:34,077 INFO L225 Difference]: With dead ends: 1855 [2021-08-12 20:06:34,077 INFO L226 Difference]: Without dead ends: 1838 [2021-08-12 20:06:34,078 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1100.9ms TimeCoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 20:06:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-08-12 20:06:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1293. [2021-08-12 20:06:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 3.3823529411764706) internal successors, (4370), 1292 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 4370 transitions. [2021-08-12 20:06:34,342 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 4370 transitions. Word has length 26 [2021-08-12 20:06:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:34,342 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 4370 transitions. [2021-08-12 20:06:34,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 4370 transitions. [2021-08-12 20:06:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:34,344 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:34,344 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:34,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-12 20:06:34,561 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:34,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 22 times [2021-08-12 20:06:34,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:34,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914616401] [2021-08-12 20:06:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:34,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:34,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914616401] [2021-08-12 20:06:34,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914616401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:34,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114607455] [2021-08-12 20:06:34,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:34,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:06:34,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:34,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:06:34,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:34,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:34,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:34,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:06:34,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:34,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:34,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:34,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:06:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:34,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114607455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:34,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:34,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:06:34,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740966287] [2021-08-12 20:06:34,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:06:34,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:34,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:06:34,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:06:34,977 INFO L87 Difference]: Start difference. First operand 1293 states and 4370 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:36,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:36,850 INFO L93 Difference]: Finished difference Result 1728 states and 5677 transitions. [2021-08-12 20:06:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:06:36,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:36,855 INFO L225 Difference]: With dead ends: 1728 [2021-08-12 20:06:36,855 INFO L226 Difference]: Without dead ends: 1705 [2021-08-12 20:06:36,855 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 525.6ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:06:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-08-12 20:06:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1334. [2021-08-12 20:06:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 3.377344336084021) internal successors, (4502), 1333 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 4502 transitions. [2021-08-12 20:06:37,130 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 4502 transitions. Word has length 26 [2021-08-12 20:06:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:37,130 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 4502 transitions. [2021-08-12 20:06:37,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 4502 transitions. [2021-08-12 20:06:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:37,132 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:37,132 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:37,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:37,333 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2036009718, now seen corresponding path program 23 times [2021-08-12 20:06:37,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:37,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128010938] [2021-08-12 20:06:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:37,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:37,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128010938] [2021-08-12 20:06:37,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128010938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:37,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652521559] [2021-08-12 20:06:37,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:37,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:06:37,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:37,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:06:37,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:37,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:37,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:37,782 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 22 treesize of output 12 [2021-08-12 20:06:37,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:37,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:37,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:37,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-08-12 20:06:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:37,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652521559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:37,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:37,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-12 20:06:37,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327085167] [2021-08-12 20:06:37,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 20:06:37,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 20:06:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:06:37,809 INFO L87 Difference]: Start difference. First operand 1334 states and 4502 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:39,350 INFO L93 Difference]: Finished difference Result 1472 states and 4843 transitions. [2021-08-12 20:06:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 20:06:39,350 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:39,354 INFO L225 Difference]: With dead ends: 1472 [2021-08-12 20:06:39,354 INFO L226 Difference]: Without dead ends: 1451 [2021-08-12 20:06:39,354 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:06:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-08-12 20:06:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1328. [2021-08-12 20:06:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 3.376789751318764) internal successors, (4481), 1327 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 4481 transitions. [2021-08-12 20:06:39,618 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 4481 transitions. Word has length 26 [2021-08-12 20:06:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:39,618 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 4481 transitions. [2021-08-12 20:06:39,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 4481 transitions. [2021-08-12 20:06:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:39,620 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:39,620 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:39,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-12 20:06:39,836 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:39,837 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 24 times [2021-08-12 20:06:39,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:39,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647973984] [2021-08-12 20:06:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:40,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:40,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647973984] [2021-08-12 20:06:40,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647973984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:40,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411505372] [2021-08-12 20:06:40,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:40,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:06:40,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:40,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:06:40,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:40,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:40,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:40,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-08-12 20:06:40,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:06:40,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:40,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:40,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:28 [2021-08-12 20:06:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:40,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411505372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:40,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:40,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:06:40,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355928264] [2021-08-12 20:06:40,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:06:40,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:40,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:06:40,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:06:40,324 INFO L87 Difference]: Start difference. First operand 1328 states and 4481 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:42,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:42,665 INFO L93 Difference]: Finished difference Result 1964 states and 6400 transitions. [2021-08-12 20:06:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:06:42,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:42,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:42,670 INFO L225 Difference]: With dead ends: 1964 [2021-08-12 20:06:42,670 INFO L226 Difference]: Without dead ends: 1937 [2021-08-12 20:06:42,670 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 698.9ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-08-12 20:06:42,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-08-12 20:06:42,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1331. [2021-08-12 20:06:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1330 states have (on average 3.3774436090225564) internal successors, (4492), 1330 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 4492 transitions. [2021-08-12 20:06:42,954 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 4492 transitions. Word has length 26 [2021-08-12 20:06:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:42,954 INFO L482 AbstractCegarLoop]: Abstraction has 1331 states and 4492 transitions. [2021-08-12 20:06:42,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 4492 transitions. [2021-08-12 20:06:42,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:42,956 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:42,956 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:43,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-12 20:06:43,157 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 25 times [2021-08-12 20:06:43,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:43,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681200802] [2021-08-12 20:06:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:43,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:43,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681200802] [2021-08-12 20:06:43,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681200802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:43,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529890723] [2021-08-12 20:06:43,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 20:06:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:43,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:06:43,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:43,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:43,594 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-12 20:06:43,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 36 [2021-08-12 20:06:43,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:43,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:43,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:43,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:5 [2021-08-12 20:06:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:43,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529890723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:43,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:43,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-12 20:06:43,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453161369] [2021-08-12 20:06:43,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 20:06:43,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:43,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 20:06:43,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:06:43,621 INFO L87 Difference]: Start difference. First operand 1331 states and 4492 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:45,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:45,060 INFO L93 Difference]: Finished difference Result 1524 states and 5030 transitions. [2021-08-12 20:06:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 20:06:45,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:45,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:45,064 INFO L225 Difference]: With dead ends: 1524 [2021-08-12 20:06:45,064 INFO L226 Difference]: Without dead ends: 1507 [2021-08-12 20:06:45,064 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:06:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2021-08-12 20:06:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1337. [2021-08-12 20:06:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 3.379491017964072) internal successors, (4515), 1336 states have internal predecessors, (4515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:45,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 4515 transitions. [2021-08-12 20:06:45,345 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 4515 transitions. Word has length 26 [2021-08-12 20:06:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:45,345 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 4515 transitions. [2021-08-12 20:06:45,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 4515 transitions. [2021-08-12 20:06:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:45,347 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:45,347 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:45,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-12 20:06:45,548 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:45,549 INFO L82 PathProgramCache]: Analyzing trace with hash -389358530, now seen corresponding path program 26 times [2021-08-12 20:06:45,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:45,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273118668] [2021-08-12 20:06:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:45,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:45,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273118668] [2021-08-12 20:06:45,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273118668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:45,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623183424] [2021-08-12 20:06:45,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:45,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:06:45,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:45,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:06:45,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:45,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:45,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:45,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-08-12 20:06:45,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:06:45,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:45,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:45,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-08-12 20:06:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:45,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623183424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:45,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:45,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:06:45,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830112612] [2021-08-12 20:06:45,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:06:45,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:45,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:06:45,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:06:45,994 INFO L87 Difference]: Start difference. First operand 1337 states and 4515 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:48,093 INFO L93 Difference]: Finished difference Result 1804 states and 5925 transitions. [2021-08-12 20:06:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:06:48,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:48,098 INFO L225 Difference]: With dead ends: 1804 [2021-08-12 20:06:48,098 INFO L226 Difference]: Without dead ends: 1777 [2021-08-12 20:06:48,099 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:06:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-08-12 20:06:48,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1344. [2021-08-12 20:06:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3842144452717795) internal successors, (4545), 1343 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4545 transitions. [2021-08-12 20:06:48,390 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4545 transitions. Word has length 26 [2021-08-12 20:06:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:48,390 INFO L482 AbstractCegarLoop]: Abstraction has 1344 states and 4545 transitions. [2021-08-12 20:06:48,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4545 transitions. [2021-08-12 20:06:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:48,393 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:48,393 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:48,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:48,594 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:48,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 27 times [2021-08-12 20:06:48,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:48,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040184761] [2021-08-12 20:06:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:48,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:48,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040184761] [2021-08-12 20:06:48,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040184761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:48,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957110724] [2021-08-12 20:06:48,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:48,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:06:48,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:48,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:06:48,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:48,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:48,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:06:48,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:48,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:48,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:48,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:06:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:49,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957110724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:49,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:49,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:06:49,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12720620] [2021-08-12 20:06:49,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:06:49,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:49,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:06:49,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:06:49,016 INFO L87 Difference]: Start difference. First operand 1344 states and 4545 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:50,826 INFO L93 Difference]: Finished difference Result 1711 states and 5673 transitions. [2021-08-12 20:06:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:06:50,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:50,831 INFO L225 Difference]: With dead ends: 1711 [2021-08-12 20:06:50,831 INFO L226 Difference]: Without dead ends: 1694 [2021-08-12 20:06:50,831 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 539.3ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:06:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-08-12 20:06:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1355. [2021-08-12 20:06:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.3840472673559825) internal successors, (4582), 1354 states have internal predecessors, (4582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4582 transitions. [2021-08-12 20:06:51,110 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4582 transitions. Word has length 26 [2021-08-12 20:06:51,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:51,110 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4582 transitions. [2021-08-12 20:06:51,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4582 transitions. [2021-08-12 20:06:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:51,112 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:51,112 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:51,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-08-12 20:06:51,312 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:51,313 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 28 times [2021-08-12 20:06:51,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:51,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213784649] [2021-08-12 20:06:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:51,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213784649] [2021-08-12 20:06:51,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213784649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144282475] [2021-08-12 20:06:51,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:51,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:06:51,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:06:51,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:51,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:51,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:51,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-08-12 20:06:51,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:06:51,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:51,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:51,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-08-12 20:06:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:51,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144282475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:51,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:51,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:06:51,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826958813] [2021-08-12 20:06:51,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:06:51,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:51,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:06:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:06:51,720 INFO L87 Difference]: Start difference. First operand 1355 states and 4582 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:54,151 INFO L93 Difference]: Finished difference Result 2045 states and 6707 transitions. [2021-08-12 20:06:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 20:06:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:54,155 INFO L225 Difference]: With dead ends: 2045 [2021-08-12 20:06:54,155 INFO L226 Difference]: Without dead ends: 2024 [2021-08-12 20:06:54,156 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 671.5ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 20:06:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-08-12 20:06:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1356. [2021-08-12 20:06:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3874538745387452) internal successors, (4590), 1355 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-08-12 20:06:54,463 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-08-12 20:06:54,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:54,463 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-08-12 20:06:54,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-08-12 20:06:54,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:54,465 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:54,465 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:54,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:54,666 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:54,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 29 times [2021-08-12 20:06:54,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:54,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514216136] [2021-08-12 20:06:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:54,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:54,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514216136] [2021-08-12 20:06:54,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514216136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:54,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343895079] [2021-08-12 20:06:54,844 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:54,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:06:54,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:54,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:06:54,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:55,054 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:06:55,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-08-12 20:06:55,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:55,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:55,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:55,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:21 [2021-08-12 20:06:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:55,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343895079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:55,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:55,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 20:06:55,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722727876] [2021-08-12 20:06:55,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:06:55,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:55,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:06:55,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:06:55,113 INFO L87 Difference]: Start difference. First operand 1356 states and 4590 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:06:57,488 INFO L93 Difference]: Finished difference Result 2002 states and 6549 transitions. [2021-08-12 20:06:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:06:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:06:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:06:57,494 INFO L225 Difference]: With dead ends: 2002 [2021-08-12 20:06:57,494 INFO L226 Difference]: Without dead ends: 1950 [2021-08-12 20:06:57,494 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 769.1ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 20:06:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-08-12 20:06:57,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1356. [2021-08-12 20:06:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.3874538745387452) internal successors, (4590), 1355 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4590 transitions. [2021-08-12 20:06:57,865 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4590 transitions. Word has length 26 [2021-08-12 20:06:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:06:57,865 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4590 transitions. [2021-08-12 20:06:57,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:06:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4590 transitions. [2021-08-12 20:06:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:06:57,867 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:06:57,867 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:06:58,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-12 20:06:58,068 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:06:58,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:06:58,068 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-08-12 20:06:58,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:06:58,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902620248] [2021-08-12 20:06:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:06:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:06:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:58,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:06:58,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902620248] [2021-08-12 20:06:58,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902620248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:58,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17913559] [2021-08-12 20:06:58,361 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:06:58,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:06:58,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:06:58,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 20:06:58,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:06:58,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:06:58,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:58,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:06:58,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:06:58,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:06:58,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:06:58,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:06:58,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:06:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:06:58,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17913559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:06:58,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:06:58,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:06:58,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701726933] [2021-08-12 20:06:58,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:06:58,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:06:58,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:06:58,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:06:58,626 INFO L87 Difference]: Start difference. First operand 1356 states and 4590 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:01,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:01,241 INFO L93 Difference]: Finished difference Result 1909 states and 6153 transitions. [2021-08-12 20:07:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 20:07:01,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:01,245 INFO L225 Difference]: With dead ends: 1909 [2021-08-12 20:07:01,246 INFO L226 Difference]: Without dead ends: 1855 [2021-08-12 20:07:01,246 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 977.6ms TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 20:07:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-08-12 20:07:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1390. [2021-08-12 20:07:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.375809935205184) internal successors, (4689), 1389 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4689 transitions. [2021-08-12 20:07:01,558 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4689 transitions. Word has length 26 [2021-08-12 20:07:01,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:01,558 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4689 transitions. [2021-08-12 20:07:01,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4689 transitions. [2021-08-12 20:07:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:01,560 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:01,560 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:01,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-12 20:07:01,776 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:01,777 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-08-12 20:07:01,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:01,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332849459] [2021-08-12 20:07:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:02,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:02,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332849459] [2021-08-12 20:07:02,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332849459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:02,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748271943] [2021-08-12 20:07:02,008 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:02,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:07:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:02,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:02,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:02,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:02,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:07:02,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:02,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:02,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:07:02,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:07:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:02,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748271943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:02,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:02,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-12 20:07:02,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629959764] [2021-08-12 20:07:02,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:07:02,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:02,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:07:02,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:07:02,211 INFO L87 Difference]: Start difference. First operand 1390 states and 4689 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:04,998 INFO L93 Difference]: Finished difference Result 1970 states and 6461 transitions. [2021-08-12 20:07:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 20:07:04,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:05,003 INFO L225 Difference]: With dead ends: 1970 [2021-08-12 20:07:05,003 INFO L226 Difference]: Without dead ends: 1953 [2021-08-12 20:07:05,003 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1035.1ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 20:07:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-08-12 20:07:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1398. [2021-08-12 20:07:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3707945597709377) internal successors, (4709), 1397 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:05,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4709 transitions. [2021-08-12 20:07:05,309 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4709 transitions. Word has length 26 [2021-08-12 20:07:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:05,309 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4709 transitions. [2021-08-12 20:07:05,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4709 transitions. [2021-08-12 20:07:05,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:05,311 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:05,311 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:05,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-12 20:07:05,512 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:05,512 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 30 times [2021-08-12 20:07:05,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:05,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015102810] [2021-08-12 20:07:05,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:05,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:05,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015102810] [2021-08-12 20:07:05,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015102810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:05,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301865839] [2021-08-12 20:07:05,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:05,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:07:05,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:07:05,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:05,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:05,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:05,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-08-12 20:07:05,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:05,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:06,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:07:06,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:98 [2021-08-12 20:07:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:06,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301865839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:06,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:06,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 20:07:06,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675416616] [2021-08-12 20:07:06,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:07:06,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:06,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:07:06,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:07:06,156 INFO L87 Difference]: Start difference. First operand 1398 states and 4709 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:11,369 INFO L93 Difference]: Finished difference Result 2368 states and 7468 transitions. [2021-08-12 20:07:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 20:07:11,369 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:11,374 INFO L225 Difference]: With dead ends: 2368 [2021-08-12 20:07:11,375 INFO L226 Difference]: Without dead ends: 2332 [2021-08-12 20:07:11,375 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2373.7ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 20:07:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-08-12 20:07:11,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1421. [2021-08-12 20:07:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 3.3816901408450706) internal successors, (4802), 1420 states have internal predecessors, (4802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 4802 transitions. [2021-08-12 20:07:11,739 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 4802 transitions. Word has length 26 [2021-08-12 20:07:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:11,739 INFO L482 AbstractCegarLoop]: Abstraction has 1421 states and 4802 transitions. [2021-08-12 20:07:11,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 4802 transitions. [2021-08-12 20:07:11,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:11,741 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:11,741 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:11,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:11,941 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:11,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-08-12 20:07:11,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:11,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863865455] [2021-08-12 20:07:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:12,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:12,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863865455] [2021-08-12 20:07:12,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863865455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:12,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012500259] [2021-08-12 20:07:12,197 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:12,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:07:12,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:12,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:07:12,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:12,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:12,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:12,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:12,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:12,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-08-12 20:07:12,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:07:12,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:12,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:07:12,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-08-12 20:07:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:12,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012500259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:12,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:12,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-12 20:07:12,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102485408] [2021-08-12 20:07:12,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 20:07:12,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:12,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 20:07:12,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:07:12,479 INFO L87 Difference]: Start difference. First operand 1421 states and 4802 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:16,936 INFO L93 Difference]: Finished difference Result 2288 states and 7252 transitions. [2021-08-12 20:07:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 20:07:16,936 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:16,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:16,941 INFO L225 Difference]: With dead ends: 2288 [2021-08-12 20:07:16,941 INFO L226 Difference]: Without dead ends: 2249 [2021-08-12 20:07:16,941 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2216.0ms TimeCoverageRelationStatistics Valid=447, Invalid=2415, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 20:07:16,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-08-12 20:07:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1440. [2021-08-12 20:07:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.3794301598332175) internal successors, (4863), 1439 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4863 transitions. [2021-08-12 20:07:17,268 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4863 transitions. Word has length 26 [2021-08-12 20:07:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:17,268 INFO L482 AbstractCegarLoop]: Abstraction has 1440 states and 4863 transitions. [2021-08-12 20:07:17,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4863 transitions. [2021-08-12 20:07:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:17,270 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:17,270 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:17,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-12 20:07:17,470 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:17,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1791604362, now seen corresponding path program 31 times [2021-08-12 20:07:17,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:17,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605667921] [2021-08-12 20:07:17,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:17,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:17,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605667921] [2021-08-12 20:07:17,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605667921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:17,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228895195] [2021-08-12 20:07:17,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:17,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:07:17,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:17,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:17,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:17,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:07:17,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:17,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:17,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:07:17,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:07:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:17,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228895195] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:17,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:17,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:07:17,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259312451] [2021-08-12 20:07:17,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:07:17,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:17,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:07:17,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:07:17,880 INFO L87 Difference]: Start difference. First operand 1440 states and 4863 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:20,509 INFO L93 Difference]: Finished difference Result 2062 states and 6657 transitions. [2021-08-12 20:07:20,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 20:07:20,509 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:20,513 INFO L225 Difference]: With dead ends: 2062 [2021-08-12 20:07:20,514 INFO L226 Difference]: Without dead ends: 2045 [2021-08-12 20:07:20,514 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 778.8ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-08-12 20:07:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-08-12 20:07:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1446. [2021-08-12 20:07:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.382006920415225) internal successors, (4887), 1445 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4887 transitions. [2021-08-12 20:07:20,865 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4887 transitions. Word has length 26 [2021-08-12 20:07:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:20,866 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4887 transitions. [2021-08-12 20:07:20,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4887 transitions. [2021-08-12 20:07:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:20,867 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:20,867 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:21,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:21,068 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:21,069 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 32 times [2021-08-12 20:07:21,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:21,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934315752] [2021-08-12 20:07:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:21,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:21,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934315752] [2021-08-12 20:07:21,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934315752] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:21,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011433782] [2021-08-12 20:07:21,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:21,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:07:21,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:21,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:07:21,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:21,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:21,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-12 20:07:21,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:21,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:21,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-08-12 20:07:21,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:312 [2021-08-12 20:07:21,620 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-08-12 20:07:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:21,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011433782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:21,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:21,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-08-12 20:07:21,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732209900] [2021-08-12 20:07:21,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:07:21,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:21,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:07:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:07:21,822 INFO L87 Difference]: Start difference. First operand 1446 states and 4887 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:22,965 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-08-12 20:07:23,104 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 38 [2021-08-12 20:07:23,246 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-08-12 20:07:23,646 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-08-12 20:07:23,825 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 38 [2021-08-12 20:07:24,924 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-08-12 20:07:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:27,076 INFO L93 Difference]: Finished difference Result 2669 states and 8421 transitions. [2021-08-12 20:07:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 20:07:27,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:27,081 INFO L225 Difference]: With dead ends: 2669 [2021-08-12 20:07:27,081 INFO L226 Difference]: Without dead ends: 2629 [2021-08-12 20:07:27,082 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 2672.1ms TimeCoverageRelationStatistics Valid=444, Invalid=1908, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 20:07:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-08-12 20:07:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1442. [2021-08-12 20:07:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3809854267869537) internal successors, (4872), 1441 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4872 transitions. [2021-08-12 20:07:27,435 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4872 transitions. Word has length 26 [2021-08-12 20:07:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:27,435 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4872 transitions. [2021-08-12 20:07:27,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4872 transitions. [2021-08-12 20:07:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:27,437 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:27,437 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:27,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-12 20:07:27,638 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:27,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 45 times [2021-08-12 20:07:27,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:27,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181321773] [2021-08-12 20:07:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:27,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:27,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181321773] [2021-08-12 20:07:27,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181321773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:27,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200573763] [2021-08-12 20:07:27,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:27,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:07:27,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:27,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:07:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:28,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:28,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:28,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:28,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:28,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-08-12 20:07:28,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:07:28,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:28,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:07:28,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:46 [2021-08-12 20:07:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:28,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200573763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:28,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:28,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-12 20:07:28,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995378293] [2021-08-12 20:07:28,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 20:07:28,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:28,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 20:07:28,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-12 20:07:28,110 INFO L87 Difference]: Start difference. First operand 1442 states and 4872 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:31,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:31,888 INFO L93 Difference]: Finished difference Result 2365 states and 7705 transitions. [2021-08-12 20:07:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:07:31,888 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:31,893 INFO L225 Difference]: With dead ends: 2365 [2021-08-12 20:07:31,893 INFO L226 Difference]: Without dead ends: 2348 [2021-08-12 20:07:31,894 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1277.6ms TimeCoverageRelationStatistics Valid=351, Invalid=1719, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 20:07:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-08-12 20:07:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1449. [2021-08-12 20:07:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.382596685082873) internal successors, (4898), 1448 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4898 transitions. [2021-08-12 20:07:32,240 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4898 transitions. Word has length 26 [2021-08-12 20:07:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:32,241 INFO L482 AbstractCegarLoop]: Abstraction has 1449 states and 4898 transitions. [2021-08-12 20:07:32,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4898 transitions. [2021-08-12 20:07:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:32,243 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:32,243 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:32,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:32,443 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:32,443 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 46 times [2021-08-12 20:07:32,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:32,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144316507] [2021-08-12 20:07:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:32,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:32,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144316507] [2021-08-12 20:07:32,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144316507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:32,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402633020] [2021-08-12 20:07:32,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:32,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:07:32,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:32,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:07:32,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:32,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:32,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:32,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:32,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-08-12 20:07:32,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:07:32,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:32,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:07:32,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-08-12 20:07:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:32,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402633020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:32,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:32,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-12 20:07:32,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885139591] [2021-08-12 20:07:32,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:07:32,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:07:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:07:32,856 INFO L87 Difference]: Start difference. First operand 1449 states and 4898 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:38,147 INFO L93 Difference]: Finished difference Result 3452 states and 10859 transitions. [2021-08-12 20:07:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 20:07:38,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:38,154 INFO L225 Difference]: With dead ends: 3452 [2021-08-12 20:07:38,154 INFO L226 Difference]: Without dead ends: 3393 [2021-08-12 20:07:38,155 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1681.9ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 20:07:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2021-08-12 20:07:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 1615. [2021-08-12 20:07:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.4052044609665426) internal successors, (5496), 1614 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5496 transitions. [2021-08-12 20:07:38,551 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5496 transitions. Word has length 26 [2021-08-12 20:07:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:38,552 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5496 transitions. [2021-08-12 20:07:38,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5496 transitions. [2021-08-12 20:07:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:38,554 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:38,554 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:38,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-12 20:07:38,761 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:38,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 33 times [2021-08-12 20:07:38,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:38,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246669285] [2021-08-12 20:07:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:38,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:38,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246669285] [2021-08-12 20:07:38,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246669285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:38,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645220038] [2021-08-12 20:07:38,927 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 [2021-08-12 20:07:38,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:07:38,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:38,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 20:07:38,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:39,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:39,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-08-12 20:07:39,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:39,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:39,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:07:39,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:75 [2021-08-12 20:07:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:39,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645220038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:39,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:39,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-08-12 20:07:39,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170049251] [2021-08-12 20:07:39,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:07:39,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:39,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:07:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:07:39,206 INFO L87 Difference]: Start difference. First operand 1615 states and 5496 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:42,580 INFO L93 Difference]: Finished difference Result 2212 states and 7261 transitions. [2021-08-12 20:07:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 20:07:42,580 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:42,585 INFO L225 Difference]: With dead ends: 2212 [2021-08-12 20:07:42,585 INFO L226 Difference]: Without dead ends: 2180 [2021-08-12 20:07:42,585 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1169.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 20:07:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-08-12 20:07:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1620. [2021-08-12 20:07:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4021000617665225) internal successors, (5508), 1619 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5508 transitions. [2021-08-12 20:07:42,981 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5508 transitions. Word has length 26 [2021-08-12 20:07:42,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:42,981 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5508 transitions. [2021-08-12 20:07:42,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:42,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5508 transitions. [2021-08-12 20:07:42,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:42,984 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:42,984 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:43,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:43,184 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:43,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 34 times [2021-08-12 20:07:43,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:43,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249531110] [2021-08-12 20:07:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:43,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:43,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249531110] [2021-08-12 20:07:43,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249531110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:43,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641710018] [2021-08-12 20:07:43,346 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 [2021-08-12 20:07:43,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:07:43,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:43,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:07:43,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:43,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:43,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-08-12 20:07:43,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:07:43,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:43,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:07:43,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-08-12 20:07:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:43,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641710018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:43,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:43,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:07:43,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540828539] [2021-08-12 20:07:43,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:07:43,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:43,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:07:43,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:07:43,547 INFO L87 Difference]: Start difference. First operand 1620 states and 5508 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:45,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:45,916 INFO L93 Difference]: Finished difference Result 2189 states and 7263 transitions. [2021-08-12 20:07:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 20:07:45,917 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:45,922 INFO L225 Difference]: With dead ends: 2189 [2021-08-12 20:07:45,922 INFO L226 Difference]: Without dead ends: 2162 [2021-08-12 20:07:45,922 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 596.8ms TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 20:07:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-08-12 20:07:46,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1623. [2021-08-12 20:07:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.401356350184957) internal successors, (5517), 1622 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5517 transitions. [2021-08-12 20:07:46,333 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5517 transitions. Word has length 26 [2021-08-12 20:07:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:46,333 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5517 transitions. [2021-08-12 20:07:46,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5517 transitions. [2021-08-12 20:07:46,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:46,335 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:46,335 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:46,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:46,536 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:46,536 INFO L82 PathProgramCache]: Analyzing trace with hash 2031976096, now seen corresponding path program 35 times [2021-08-12 20:07:46,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:46,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114002223] [2021-08-12 20:07:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:46,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:46,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114002223] [2021-08-12 20:07:46,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114002223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:46,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445653879] [2021-08-12 20:07:46,693 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 [2021-08-12 20:07:46,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 20:07:46,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:46,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:07:46,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:46,912 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:07:46,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 56 [2021-08-12 20:07:46,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:46,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:46,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:07:46,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:19 [2021-08-12 20:07:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:46,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445653879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:46,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:46,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 20:07:46,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412393828] [2021-08-12 20:07:46,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:07:46,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:46,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:07:46,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:07:46,971 INFO L87 Difference]: Start difference. First operand 1623 states and 5517 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:50,440 INFO L93 Difference]: Finished difference Result 2466 states and 8033 transitions. [2021-08-12 20:07:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 20:07:50,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:50,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:50,446 INFO L225 Difference]: With dead ends: 2466 [2021-08-12 20:07:50,446 INFO L226 Difference]: Without dead ends: 2430 [2021-08-12 20:07:50,447 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1097.6ms TimeCoverageRelationStatistics Valid=357, Invalid=1535, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 20:07:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-08-12 20:07:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 1617. [2021-08-12 20:07:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.3991336633663365) internal successors, (5493), 1616 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5493 transitions. [2021-08-12 20:07:50,892 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5493 transitions. Word has length 26 [2021-08-12 20:07:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:50,893 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 5493 transitions. [2021-08-12 20:07:50,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5493 transitions. [2021-08-12 20:07:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:50,895 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:50,895 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:51,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:51,097 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:51,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 47 times [2021-08-12 20:07:51,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:51,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911927631] [2021-08-12 20:07:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:51,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:51,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911927631] [2021-08-12 20:07:51,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911927631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:51,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032898352] [2021-08-12 20:07:51,384 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:51,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 20:07:51,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:07:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:51,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:51,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:51,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:51,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:51,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:07:51,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:51,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:51,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:07:51,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:07:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:51,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032898352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:51,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:51,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-12 20:07:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100119395] [2021-08-12 20:07:51,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:07:51,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:07:51,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:07:51,554 INFO L87 Difference]: Start difference. First operand 1617 states and 5493 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:54,431 INFO L93 Difference]: Finished difference Result 2082 states and 6845 transitions. [2021-08-12 20:07:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:07:54,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:54,436 INFO L225 Difference]: With dead ends: 2082 [2021-08-12 20:07:54,436 INFO L226 Difference]: Without dead ends: 2058 [2021-08-12 20:07:54,436 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1101.4ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 20:07:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-08-12 20:07:54,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1607. [2021-08-12 20:07:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.398505603985056) internal successors, (5458), 1606 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-08-12 20:07:54,835 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-08-12 20:07:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:54,835 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-08-12 20:07:54,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-08-12 20:07:54,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:54,838 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:54,838 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:55,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:55,039 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:55,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:55,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 48 times [2021-08-12 20:07:55,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:55,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192244303] [2021-08-12 20:07:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:55,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:55,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192244303] [2021-08-12 20:07:55,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192244303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:55,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802935356] [2021-08-12 20:07:55,312 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:55,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 20:07:55,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:07:55,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:07:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:07:55,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:55,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:55,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:07:55,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:07:55,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-12 20:07:55,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:07:55,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:07:55,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:07:55,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-08-12 20:07:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:55,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802935356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:55,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:07:55,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-12 20:07:55,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532790684] [2021-08-12 20:07:55,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:07:55,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:07:55,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:07:55,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:07:55,511 INFO L87 Difference]: Start difference. First operand 1607 states and 5458 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:07:58,874 INFO L93 Difference]: Finished difference Result 2209 states and 7296 transitions. [2021-08-12 20:07:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 20:07:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:07:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:07:58,879 INFO L225 Difference]: With dead ends: 2209 [2021-08-12 20:07:58,879 INFO L226 Difference]: Without dead ends: 2192 [2021-08-12 20:07:58,879 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1485.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 20:07:58,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-08-12 20:07:59,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1607. [2021-08-12 20:07:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.398505603985056) internal successors, (5458), 1606 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5458 transitions. [2021-08-12 20:07:59,273 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5458 transitions. Word has length 26 [2021-08-12 20:07:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:07:59,273 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5458 transitions. [2021-08-12 20:07:59,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:07:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5458 transitions. [2021-08-12 20:07:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:07:59,276 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:07:59,276 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:07:59,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-12 20:07:59,477 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:07:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:07:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 49 times [2021-08-12 20:07:59,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:07:59,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22728796] [2021-08-12 20:07:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:07:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:07:59,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:07:59,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22728796] [2021-08-12 20:07:59,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22728796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:07:59,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183713076] [2021-08-12 20:07:59,747 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:07:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:07:59,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:07:59,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:00,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:00,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:00,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:00,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:08:00,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:00,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:00,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:00,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:08:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:00,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183713076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:00,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:00,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-12 20:08:00,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394905242] [2021-08-12 20:08:00,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:08:00,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:00,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:08:00,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:08:00,034 INFO L87 Difference]: Start difference. First operand 1607 states and 5458 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:04,211 INFO L93 Difference]: Finished difference Result 2724 states and 8799 transitions. [2021-08-12 20:08:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 20:08:04,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:04,218 INFO L225 Difference]: With dead ends: 2724 [2021-08-12 20:08:04,218 INFO L226 Difference]: Without dead ends: 2686 [2021-08-12 20:08:04,219 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1503.8ms TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 20:08:04,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-08-12 20:08:04,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 1677. [2021-08-12 20:08:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.389021479713604) internal successors, (5680), 1676 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5680 transitions. [2021-08-12 20:08:04,657 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5680 transitions. Word has length 26 [2021-08-12 20:08:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:04,657 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5680 transitions. [2021-08-12 20:08:04,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:04,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5680 transitions. [2021-08-12 20:08:04,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:04,659 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:04,659 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:04,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-08-12 20:08:04,860 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:04,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:04,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1611336786, now seen corresponding path program 50 times [2021-08-12 20:08:04,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:04,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697219686] [2021-08-12 20:08:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:05,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:05,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697219686] [2021-08-12 20:08:05,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697219686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:05,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364838724] [2021-08-12 20:08:05,126 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:05,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:08:05,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:05,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:08:05,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:05,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:05,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:05,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:05,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:05,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-08-12 20:08:05,286 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:08:05,302 INFO L628 ElimStorePlain]: treesize reduction 20, result has 47.4 percent of original size [2021-08-12 20:08:05,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:05,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:18 [2021-08-12 20:08:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:05,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364838724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:05,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:05,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-08-12 20:08:05,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401409577] [2021-08-12 20:08:05,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:08:05,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:05,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:08:05,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:08:05,349 INFO L87 Difference]: Start difference. First operand 1677 states and 5680 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:12,794 INFO L93 Difference]: Finished difference Result 3352 states and 10514 transitions. [2021-08-12 20:08:12,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-12 20:08:12,795 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:12,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:12,801 INFO L225 Difference]: With dead ends: 3352 [2021-08-12 20:08:12,801 INFO L226 Difference]: Without dead ends: 3286 [2021-08-12 20:08:12,801 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 3528.6ms TimeCoverageRelationStatistics Valid=1163, Invalid=5317, Unknown=0, NotChecked=0, Total=6480 [2021-08-12 20:08:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-08-12 20:08:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 1694. [2021-08-12 20:08:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1693 states have (on average 3.375073833431778) internal successors, (5714), 1693 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 5714 transitions. [2021-08-12 20:08:13,235 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 5714 transitions. Word has length 26 [2021-08-12 20:08:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:13,235 INFO L482 AbstractCegarLoop]: Abstraction has 1694 states and 5714 transitions. [2021-08-12 20:08:13,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:13,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 5714 transitions. [2021-08-12 20:08:13,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:13,238 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:13,238 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:13,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-12 20:08:13,438 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:13,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:13,439 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 51 times [2021-08-12 20:08:13,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:13,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226239534] [2021-08-12 20:08:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:13,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:13,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226239534] [2021-08-12 20:08:13,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226239534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:13,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612103893] [2021-08-12 20:08:13,712 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:13,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 20:08:13,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:13,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 20:08:13,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:13,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:13,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-08-12 20:08:13,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:08:14,064 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-08-12 20:08:14,064 INFO L628 ElimStorePlain]: treesize reduction 81, result has 51.5 percent of original size [2021-08-12 20:08:14,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:14,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:273 [2021-08-12 20:08:14,217 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-08-12 20:08:14,379 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-08-12 20:08:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:14,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612103893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:14,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:14,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-12 20:08:14,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786337366] [2021-08-12 20:08:14,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 20:08:14,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:14,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 20:08:14,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-12 20:08:14,472 INFO L87 Difference]: Start difference. First operand 1694 states and 5714 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:15,641 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-08-12 20:08:16,151 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-08-12 20:08:16,491 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-08-12 20:08:17,157 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-08-12 20:08:17,325 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2021-08-12 20:08:18,805 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-08-12 20:08:19,606 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-08-12 20:08:19,783 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-08-12 20:08:20,449 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-08-12 20:08:21,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:21,322 INFO L93 Difference]: Finished difference Result 2844 states and 9159 transitions. [2021-08-12 20:08:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-12 20:08:21,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:21,329 INFO L225 Difference]: With dead ends: 2844 [2021-08-12 20:08:21,329 INFO L226 Difference]: Without dead ends: 2797 [2021-08-12 20:08:21,330 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3494.1ms TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 20:08:21,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-08-12 20:08:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 1705. [2021-08-12 20:08:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.380868544600939) internal successors, (5761), 1704 states have internal predecessors, (5761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5761 transitions. [2021-08-12 20:08:21,899 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5761 transitions. Word has length 26 [2021-08-12 20:08:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:21,899 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5761 transitions. [2021-08-12 20:08:21,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5761 transitions. [2021-08-12 20:08:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:21,902 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:21,902 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:22,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:22,117 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:22,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1813857782, now seen corresponding path program 52 times [2021-08-12 20:08:22,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:22,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351422922] [2021-08-12 20:08:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:22,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:22,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351422922] [2021-08-12 20:08:22,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351422922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:22,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195510883] [2021-08-12 20:08:22,347 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:22,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:08:22,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:22,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:08:22,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:22,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:22,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:22,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:22,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:22,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-12 20:08:22,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:22,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:22,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:22,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:10 [2021-08-12 20:08:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:22,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195510883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:22,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:22,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-12 20:08:22,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197016108] [2021-08-12 20:08:22,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:08:22,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:22,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:08:22,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:08:22,572 INFO L87 Difference]: Start difference. First operand 1705 states and 5761 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:26,569 INFO L93 Difference]: Finished difference Result 2160 states and 7108 transitions. [2021-08-12 20:08:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 20:08:26,569 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:26,575 INFO L225 Difference]: With dead ends: 2160 [2021-08-12 20:08:26,575 INFO L226 Difference]: Without dead ends: 2143 [2021-08-12 20:08:26,576 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1538.5ms TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 20:08:26,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-08-12 20:08:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1709. [2021-08-12 20:08:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.3811475409836067) internal successors, (5775), 1708 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-08-12 20:08:27,151 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-08-12 20:08:27,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:27,151 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-08-12 20:08:27,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-08-12 20:08:27,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:27,154 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:27,154 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:27,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-12 20:08:27,354 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:27,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash -782211534, now seen corresponding path program 53 times [2021-08-12 20:08:27,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:27,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359887093] [2021-08-12 20:08:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:27,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:27,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359887093] [2021-08-12 20:08:27,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359887093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:27,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127782645] [2021-08-12 20:08:27,600 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:27,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 20:08:27,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:27,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:08:27,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:27,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:27,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:27,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-08-12 20:08:27,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:08:27,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:27,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:27,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-08-12 20:08:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:27,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127782645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:27,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:27,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-12 20:08:27,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520480718] [2021-08-12 20:08:27,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 20:08:27,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:27,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 20:08:27,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-12 20:08:27,935 INFO L87 Difference]: Start difference. First operand 1709 states and 5775 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:31,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:31,897 INFO L93 Difference]: Finished difference Result 2443 states and 8077 transitions. [2021-08-12 20:08:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:08:31,898 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:31,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:31,904 INFO L225 Difference]: With dead ends: 2443 [2021-08-12 20:08:31,904 INFO L226 Difference]: Without dead ends: 2426 [2021-08-12 20:08:31,904 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1154.7ms TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 20:08:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-08-12 20:08:32,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1709. [2021-08-12 20:08:32,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.3811475409836067) internal successors, (5775), 1708 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5775 transitions. [2021-08-12 20:08:32,511 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5775 transitions. Word has length 26 [2021-08-12 20:08:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:32,511 INFO L482 AbstractCegarLoop]: Abstraction has 1709 states and 5775 transitions. [2021-08-12 20:08:32,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5775 transitions. [2021-08-12 20:08:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:32,514 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:32,514 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:32,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-12 20:08:32,715 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:32,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:32,715 INFO L82 PathProgramCache]: Analyzing trace with hash 370367166, now seen corresponding path program 54 times [2021-08-12 20:08:32,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:32,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353872914] [2021-08-12 20:08:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:32,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:32,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353872914] [2021-08-12 20:08:32,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353872914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:32,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029994703] [2021-08-12 20:08:32,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:33,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 20:08:33,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:33,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:08:33,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:33,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:33,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:33,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:33,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:08:33,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:33,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:33,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:33,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:08:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029994703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:33,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:33,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-12 20:08:33,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685161464] [2021-08-12 20:08:33,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:08:33,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:08:33,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:08:33,179 INFO L87 Difference]: Start difference. First operand 1709 states and 5775 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:36,317 INFO L93 Difference]: Finished difference Result 2139 states and 7031 transitions. [2021-08-12 20:08:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 20:08:36,317 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:36,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:36,322 INFO L225 Difference]: With dead ends: 2139 [2021-08-12 20:08:36,322 INFO L226 Difference]: Without dead ends: 2118 [2021-08-12 20:08:36,322 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 911.9ms TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 20:08:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2021-08-12 20:08:36,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 1703. [2021-08-12 20:08:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.380728554641598) internal successors, (5754), 1702 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5754 transitions. [2021-08-12 20:08:36,790 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5754 transitions. Word has length 26 [2021-08-12 20:08:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:36,791 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5754 transitions. [2021-08-12 20:08:36,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5754 transitions. [2021-08-12 20:08:36,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:36,793 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:36,793 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:36,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:36,994 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:36,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:36,994 INFO L82 PathProgramCache]: Analyzing trace with hash 376151132, now seen corresponding path program 55 times [2021-08-12 20:08:36,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:36,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485489926] [2021-08-12 20:08:36,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:37,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:37,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485489926] [2021-08-12 20:08:37,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485489926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:37,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810521032] [2021-08-12 20:08:37,292 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:37,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:08:37,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:37,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:37,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:37,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:37,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-12 20:08:37,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:08:37,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:37,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:37,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-08-12 20:08:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:37,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810521032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:37,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:37,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-12 20:08:37,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890347620] [2021-08-12 20:08:37,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:08:37,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:37,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:08:37,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:08:37,488 INFO L87 Difference]: Start difference. First operand 1703 states and 5754 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:43,335 INFO L93 Difference]: Finished difference Result 2953 states and 9378 transitions. [2021-08-12 20:08:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 20:08:43,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:43,341 INFO L225 Difference]: With dead ends: 2953 [2021-08-12 20:08:43,342 INFO L226 Difference]: Without dead ends: 2932 [2021-08-12 20:08:43,342 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1960.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 20:08:43,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-08-12 20:08:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1697. [2021-08-12 20:08:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3767688679245285) internal successors, (5727), 1696 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5727 transitions. [2021-08-12 20:08:43,904 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5727 transitions. Word has length 26 [2021-08-12 20:08:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:43,904 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5727 transitions. [2021-08-12 20:08:43,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5727 transitions. [2021-08-12 20:08:43,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:43,907 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:43,907 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:44,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:44,107 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:44,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 36 times [2021-08-12 20:08:44,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:44,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549991240] [2021-08-12 20:08:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:44,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:44,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549991240] [2021-08-12 20:08:44,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549991240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:44,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108195411] [2021-08-12 20:08:44,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:44,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:08:44,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:44,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:08:44,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:44,456 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-12 20:08:44,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-08-12 20:08:44,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:44,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:44,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:44,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:49 [2021-08-12 20:08:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:44,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108195411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:44,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:44,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-12 20:08:44,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879837139] [2021-08-12 20:08:44,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:08:44,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:44,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:08:44,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:08:44,517 INFO L87 Difference]: Start difference. First operand 1697 states and 5727 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:48,773 INFO L93 Difference]: Finished difference Result 2363 states and 7671 transitions. [2021-08-12 20:08:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:08:48,773 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:48,780 INFO L225 Difference]: With dead ends: 2363 [2021-08-12 20:08:48,780 INFO L226 Difference]: Without dead ends: 2331 [2021-08-12 20:08:48,780 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1151.0ms TimeCoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 20:08:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-08-12 20:08:49,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1708. [2021-08-12 20:08:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.3807850029291155) internal successors, (5771), 1707 states have internal predecessors, (5771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5771 transitions. [2021-08-12 20:08:49,409 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5771 transitions. Word has length 26 [2021-08-12 20:08:49,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:49,409 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5771 transitions. [2021-08-12 20:08:49,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5771 transitions. [2021-08-12 20:08:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:49,412 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:49,412 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:49,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-12 20:08:49,625 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:49,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1644457752, now seen corresponding path program 37 times [2021-08-12 20:08:49,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:49,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919167362] [2021-08-12 20:08:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:49,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:49,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919167362] [2021-08-12 20:08:49,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919167362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:49,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196927393] [2021-08-12 20:08:49,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 20:08:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:49,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:08:49,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:49,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:49,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:49,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:49,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-08-12 20:08:49,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:08:49,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:49,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:49,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-08-12 20:08:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:49,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196927393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:49,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:49,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:08:49,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450313049] [2021-08-12 20:08:49,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:08:49,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:49,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:08:49,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:08:49,997 INFO L87 Difference]: Start difference. First operand 1708 states and 5771 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:53,505 INFO L93 Difference]: Finished difference Result 2201 states and 7283 transitions. [2021-08-12 20:08:53,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:08:53,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:53,511 INFO L225 Difference]: With dead ends: 2201 [2021-08-12 20:08:53,511 INFO L226 Difference]: Without dead ends: 2184 [2021-08-12 20:08:53,512 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 795.3ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 20:08:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-08-12 20:08:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1697. [2021-08-12 20:08:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 3.3838443396226414) internal successors, (5739), 1696 states have internal predecessors, (5739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 5739 transitions. [2021-08-12 20:08:54,114 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 5739 transitions. Word has length 26 [2021-08-12 20:08:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:54,114 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 5739 transitions. [2021-08-12 20:08:54,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 5739 transitions. [2021-08-12 20:08:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:54,116 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:54,116 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:54,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:54,317 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:54,317 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 38 times [2021-08-12 20:08:54,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:54,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220273104] [2021-08-12 20:08:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:54,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220273104] [2021-08-12 20:08:54,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220273104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:54,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838700872] [2021-08-12 20:08:54,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:54,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:08:54,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:54,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:08:54,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:54,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:08:54,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:08:54,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:08:54,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:54,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:54,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:54,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-08-12 20:08:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:54,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838700872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:54,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:54,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:08:54,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649744919] [2021-08-12 20:08:54,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:08:54,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:54,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:08:54,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:08:54,718 INFO L87 Difference]: Start difference. First operand 1697 states and 5739 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:08:57,922 INFO L93 Difference]: Finished difference Result 2367 states and 7783 transitions. [2021-08-12 20:08:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 20:08:57,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:08:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:08:57,928 INFO L225 Difference]: With dead ends: 2367 [2021-08-12 20:08:57,928 INFO L226 Difference]: Without dead ends: 2350 [2021-08-12 20:08:57,929 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 600.5ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:08:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-08-12 20:08:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1689. [2021-08-12 20:08:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 3.382701421800948) internal successors, (5710), 1688 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 5710 transitions. [2021-08-12 20:08:58,431 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 5710 transitions. Word has length 26 [2021-08-12 20:08:58,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:08:58,431 INFO L482 AbstractCegarLoop]: Abstraction has 1689 states and 5710 transitions. [2021-08-12 20:08:58,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:08:58,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 5710 transitions. [2021-08-12 20:08:58,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:08:58,434 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:08:58,434 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:08:58,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:58,634 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:08:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:08:58,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1034369354, now seen corresponding path program 39 times [2021-08-12 20:08:58,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:08:58,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478455896] [2021-08-12 20:08:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:08:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:08:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:58,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:08:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478455896] [2021-08-12 20:08:58,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478455896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879727350] [2021-08-12 20:08:58,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:08:58,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:08:58,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:08:58,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:08:58,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:08:58,951 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:08:58,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-08-12 20:08:58,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:08:58,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:08:58,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:08:58,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-08-12 20:08:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:08:59,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879727350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:08:59,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:08:59,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:08:59,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080163333] [2021-08-12 20:08:59,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:08:59,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:08:59,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:08:59,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:08:59,010 INFO L87 Difference]: Start difference. First operand 1689 states and 5710 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:02,711 INFO L93 Difference]: Finished difference Result 2547 states and 8380 transitions. [2021-08-12 20:09:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 20:09:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:02,717 INFO L225 Difference]: With dead ends: 2547 [2021-08-12 20:09:02,718 INFO L226 Difference]: Without dead ends: 2530 [2021-08-12 20:09:02,718 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 744.8ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-08-12 20:09:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-08-12 20:09:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1683. [2021-08-12 20:09:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.3787158145065397) internal successors, (5683), 1682 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5683 transitions. [2021-08-12 20:09:03,235 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5683 transitions. Word has length 26 [2021-08-12 20:09:03,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:03,236 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5683 transitions. [2021-08-12 20:09:03,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:03,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5683 transitions. [2021-08-12 20:09:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:03,238 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:03,238 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:03,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:03,439 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:03,439 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 40 times [2021-08-12 20:09:03,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:03,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341945423] [2021-08-12 20:09:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:03,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:03,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341945423] [2021-08-12 20:09:03,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341945423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:03,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390786936] [2021-08-12 20:09:03,585 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 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 [2021-08-12 20:09:03,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:09:03,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:03,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:09:03,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:03,790 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-12 20:09:03,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-08-12 20:09:03,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:03,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:03,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:03,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-08-12 20:09:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:03,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390786936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:03,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:03,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:09:03,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443867306] [2021-08-12 20:09:03,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:09:03,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:03,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:09:03,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:03,812 INFO L87 Difference]: Start difference. First operand 1683 states and 5683 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:06,920 INFO L93 Difference]: Finished difference Result 2245 states and 7365 transitions. [2021-08-12 20:09:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:09:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:06,925 INFO L225 Difference]: With dead ends: 2245 [2021-08-12 20:09:06,925 INFO L226 Difference]: Without dead ends: 2218 [2021-08-12 20:09:06,926 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 622.0ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:09:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-08-12 20:09:07,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1692. [2021-08-12 20:09:07,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1692 states, 1691 states have (on average 3.3820224719101124) internal successors, (5719), 1691 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1692 states to 1692 states and 5719 transitions. [2021-08-12 20:09:07,424 INFO L78 Accepts]: Start accepts. Automaton has 1692 states and 5719 transitions. Word has length 26 [2021-08-12 20:09:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:07,425 INFO L482 AbstractCegarLoop]: Abstraction has 1692 states and 5719 transitions. [2021-08-12 20:09:07,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1692 states and 5719 transitions. [2021-08-12 20:09:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:07,427 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:07,427 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:07,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-12 20:09:07,627 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:07,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1571862210, now seen corresponding path program 41 times [2021-08-12 20:09:07,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:07,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670916131] [2021-08-12 20:09:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:07,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:07,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670916131] [2021-08-12 20:09:07,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670916131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:07,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84295914] [2021-08-12 20:09:07,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:07,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:09:07,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:07,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:09:07,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:07,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:07,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-08-12 20:09:07,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:09:07,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:07,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:07,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-08-12 20:09:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:07,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84295914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:07,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:07,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:09:07,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190420156] [2021-08-12 20:09:07,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:09:07,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:07,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:09:07,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:07,996 INFO L87 Difference]: Start difference. First operand 1692 states and 5719 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:11,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:11,157 INFO L93 Difference]: Finished difference Result 2412 states and 7911 transitions. [2021-08-12 20:09:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:09:11,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:11,163 INFO L225 Difference]: With dead ends: 2412 [2021-08-12 20:09:11,163 INFO L226 Difference]: Without dead ends: 2385 [2021-08-12 20:09:11,163 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:09:11,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-08-12 20:09:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1674. [2021-08-12 20:09:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.3807531380753137) internal successors, (5656), 1673 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5656 transitions. [2021-08-12 20:09:11,662 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5656 transitions. Word has length 26 [2021-08-12 20:09:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:11,662 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5656 transitions. [2021-08-12 20:09:11,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5656 transitions. [2021-08-12 20:09:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:11,665 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:11,665 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:11,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-08-12 20:09:11,881 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:11,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:11,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 42 times [2021-08-12 20:09:11,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:11,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858892879] [2021-08-12 20:09:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:11,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:11,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858892879] [2021-08-12 20:09:11,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858892879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:11,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90583162] [2021-08-12 20:09:11,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:12,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:09:12,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:12,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:09:12,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:12,203 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-12 20:09:12,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 64 [2021-08-12 20:09:12,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:12,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:12,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:12,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:78, output treesize:77 [2021-08-12 20:09:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:12,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90583162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:12,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:12,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-12 20:09:12,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365135829] [2021-08-12 20:09:12,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:09:12,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:12,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:09:12,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:09:12,328 INFO L87 Difference]: Start difference. First operand 1674 states and 5656 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:15,974 INFO L93 Difference]: Finished difference Result 2337 states and 7670 transitions. [2021-08-12 20:09:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:09:15,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:15,980 INFO L225 Difference]: With dead ends: 2337 [2021-08-12 20:09:15,981 INFO L226 Difference]: Without dead ends: 2310 [2021-08-12 20:09:15,981 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 821.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 20:09:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-08-12 20:09:16,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1662. [2021-08-12 20:09:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.3798916315472605) internal successors, (5614), 1661 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5614 transitions. [2021-08-12 20:09:16,475 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5614 transitions. Word has length 26 [2021-08-12 20:09:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:16,475 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5614 transitions. [2021-08-12 20:09:16,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5614 transitions. [2021-08-12 20:09:16,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:16,477 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:16,477 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:16,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-12 20:09:16,678 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:16,678 INFO L82 PathProgramCache]: Analyzing trace with hash 518793590, now seen corresponding path program 43 times [2021-08-12 20:09:16,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:16,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275479790] [2021-08-12 20:09:16,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:16,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:16,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275479790] [2021-08-12 20:09:16,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275479790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:16,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47040271] [2021-08-12 20:09:16,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:09:16,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:16,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:16,982 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-08-12 20:09:16,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 52 [2021-08-12 20:09:16,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:16,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:16,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:16,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:22 [2021-08-12 20:09:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:17,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47040271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:17,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:17,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:09:17,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566645076] [2021-08-12 20:09:17,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:09:17,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:09:17,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:17,037 INFO L87 Difference]: Start difference. First operand 1662 states and 5614 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:20,244 INFO L93 Difference]: Finished difference Result 2263 states and 7458 transitions. [2021-08-12 20:09:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 20:09:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:20,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:20,250 INFO L225 Difference]: With dead ends: 2263 [2021-08-12 20:09:20,250 INFO L226 Difference]: Without dead ends: 2242 [2021-08-12 20:09:20,251 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 698.2ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 20:09:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-08-12 20:09:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1649. [2021-08-12 20:09:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.3780339805825244) internal successors, (5567), 1648 states have internal predecessors, (5567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5567 transitions. [2021-08-12 20:09:20,885 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5567 transitions. Word has length 26 [2021-08-12 20:09:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:20,885 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5567 transitions. [2021-08-12 20:09:20,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5567 transitions. [2021-08-12 20:09:20,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:20,888 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:20,888 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:21,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:21,089 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:21,089 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 44 times [2021-08-12 20:09:21,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:21,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638079859] [2021-08-12 20:09:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:21,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:21,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638079859] [2021-08-12 20:09:21,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638079859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:21,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686355331] [2021-08-12 20:09:21,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:21,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:09:21,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:21,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:09:21,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:21,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:21,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:21,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:09:21,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:21,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:21,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:21,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:09:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:21,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686355331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:21,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:21,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:09:21,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174651091] [2021-08-12 20:09:21,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:09:21,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:21,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:09:21,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:21,439 INFO L87 Difference]: Start difference. First operand 1649 states and 5567 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:24,453 INFO L93 Difference]: Finished difference Result 2221 states and 7299 transitions. [2021-08-12 20:09:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 20:09:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:24,458 INFO L225 Difference]: With dead ends: 2221 [2021-08-12 20:09:24,458 INFO L226 Difference]: Without dead ends: 2204 [2021-08-12 20:09:24,459 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 570.1ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-08-12 20:09:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-08-12 20:09:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1700. [2021-08-12 20:09:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.3737492642731017) internal successors, (5732), 1699 states have internal predecessors, (5732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5732 transitions. [2021-08-12 20:09:25,015 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5732 transitions. Word has length 26 [2021-08-12 20:09:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:25,015 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 5732 transitions. [2021-08-12 20:09:25,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5732 transitions. [2021-08-12 20:09:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:25,017 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:25,018 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:25,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-08-12 20:09:25,219 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:25,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 45 times [2021-08-12 20:09:25,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:25,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250776167] [2021-08-12 20:09:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:25,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:25,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250776167] [2021-08-12 20:09:25,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250776167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:25,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676306977] [2021-08-12 20:09:25,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:25,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:09:25,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:25,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:09:25,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:25,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:25,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:25,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-08-12 20:09:25,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:25,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:25,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:09:25,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-08-12 20:09:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:25,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676306977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:25,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:25,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:09:25,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857893752] [2021-08-12 20:09:25,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:09:25,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:25,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:09:25,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:25,634 INFO L87 Difference]: Start difference. First operand 1700 states and 5732 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:28,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:28,962 INFO L93 Difference]: Finished difference Result 2460 states and 8077 transitions. [2021-08-12 20:09:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:09:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:28,968 INFO L225 Difference]: With dead ends: 2460 [2021-08-12 20:09:28,968 INFO L226 Difference]: Without dead ends: 2443 [2021-08-12 20:09:28,968 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 514.3ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:09:28,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-08-12 20:09:29,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1695. [2021-08-12 20:09:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.374852420306966) internal successors, (5717), 1694 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:29,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5717 transitions. [2021-08-12 20:09:29,467 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5717 transitions. Word has length 26 [2021-08-12 20:09:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:29,467 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5717 transitions. [2021-08-12 20:09:29,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5717 transitions. [2021-08-12 20:09:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:29,470 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:29,470 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:29,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:29,670 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash 436254142, now seen corresponding path program 46 times [2021-08-12 20:09:29,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:29,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282660225] [2021-08-12 20:09:29,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:29,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:29,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282660225] [2021-08-12 20:09:29,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282660225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:29,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604582354] [2021-08-12 20:09:29,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:29,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:09:29,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:29,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:09:29,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:30,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:30,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:30,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:09:30,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:30,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:30,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:30,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-08-12 20:09:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:30,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604582354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:30,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:30,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:09:30,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217048818] [2021-08-12 20:09:30,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:09:30,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:30,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:09:30,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:30,052 INFO L87 Difference]: Start difference. First operand 1695 states and 5717 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:33,019 INFO L93 Difference]: Finished difference Result 2253 states and 7433 transitions. [2021-08-12 20:09:33,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 20:09:33,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:33,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:33,024 INFO L225 Difference]: With dead ends: 2253 [2021-08-12 20:09:33,025 INFO L226 Difference]: Without dead ends: 2236 [2021-08-12 20:09:33,025 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-08-12 20:09:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-08-12 20:09:33,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 1698. [2021-08-12 20:09:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 3.3783146729522686) internal successors, (5733), 1697 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5733 transitions. [2021-08-12 20:09:33,511 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5733 transitions. Word has length 26 [2021-08-12 20:09:33,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:33,512 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 5733 transitions. [2021-08-12 20:09:33,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5733 transitions. [2021-08-12 20:09:33,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:33,514 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:33,514 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:33,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-08-12 20:09:33,729 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:33,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1514157122, now seen corresponding path program 47 times [2021-08-12 20:09:33,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:33,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938680254] [2021-08-12 20:09:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:33,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:33,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938680254] [2021-08-12 20:09:33,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938680254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:33,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368846261] [2021-08-12 20:09:33,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:33,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:09:33,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:09:33,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:34,041 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-12 20:09:34,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 49 [2021-08-12 20:09:34,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:34,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:34,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:34,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:5 [2021-08-12 20:09:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:34,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368846261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:34,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:34,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:09:34,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682338869] [2021-08-12 20:09:34,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:09:34,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:34,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:09:34,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:34,068 INFO L87 Difference]: Start difference. First operand 1698 states and 5733 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:37,258 INFO L93 Difference]: Finished difference Result 2289 states and 7546 transitions. [2021-08-12 20:09:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 20:09:37,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:37,264 INFO L225 Difference]: With dead ends: 2289 [2021-08-12 20:09:37,264 INFO L226 Difference]: Without dead ends: 2272 [2021-08-12 20:09:37,264 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-08-12 20:09:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-08-12 20:09:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1716. [2021-08-12 20:09:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.3743440233236153) internal successors, (5787), 1715 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5787 transitions. [2021-08-12 20:09:37,784 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5787 transitions. Word has length 26 [2021-08-12 20:09:37,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:37,785 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5787 transitions. [2021-08-12 20:09:37,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:37,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5787 transitions. [2021-08-12 20:09:37,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:37,787 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:37,787 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:37,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-08-12 20:09:37,987 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:37,988 INFO L82 PathProgramCache]: Analyzing trace with hash -714815838, now seen corresponding path program 48 times [2021-08-12 20:09:37,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:37,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289102099] [2021-08-12 20:09:37,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:38,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:38,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289102099] [2021-08-12 20:09:38,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289102099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:38,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188660979] [2021-08-12 20:09:38,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:38,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:09:38,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:38,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:09:38,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:38,280 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:09:38,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-08-12 20:09:38,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:38,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:38,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:38,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-08-12 20:09:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:38,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188660979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:38,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:38,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:09:38,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333972420] [2021-08-12 20:09:38,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:09:38,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:38,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:09:38,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:38,330 INFO L87 Difference]: Start difference. First operand 1716 states and 5787 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:41,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:41,688 INFO L93 Difference]: Finished difference Result 2278 states and 7540 transitions. [2021-08-12 20:09:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 20:09:41,689 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:41,694 INFO L225 Difference]: With dead ends: 2278 [2021-08-12 20:09:41,694 INFO L226 Difference]: Without dead ends: 2261 [2021-08-12 20:09:41,694 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 706.3ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 20:09:41,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-08-12 20:09:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1734. [2021-08-12 20:09:42,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3721869590305826) internal successors, (5844), 1733 states have internal predecessors, (5844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5844 transitions. [2021-08-12 20:09:42,194 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5844 transitions. Word has length 26 [2021-08-12 20:09:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:42,194 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5844 transitions. [2021-08-12 20:09:42,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:42,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5844 transitions. [2021-08-12 20:09:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:42,196 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:42,196 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:42,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-12 20:09:42,398 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash 272675774, now seen corresponding path program 49 times [2021-08-12 20:09:42,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:42,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321691957] [2021-08-12 20:09:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:42,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:42,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321691957] [2021-08-12 20:09:42,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321691957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:42,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533842211] [2021-08-12 20:09:42,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:42,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:09:42,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:42,704 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-12 20:09:42,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 54 [2021-08-12 20:09:42,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:42,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:42,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:09:42,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:67 [2021-08-12 20:09:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:42,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533842211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:42,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:42,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:09:42,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204302294] [2021-08-12 20:09:42,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:09:42,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:42,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:09:42,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:42,805 INFO L87 Difference]: Start difference. First operand 1734 states and 5844 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:45,543 INFO L93 Difference]: Finished difference Result 2331 states and 7685 transitions. [2021-08-12 20:09:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 20:09:45,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:45,548 INFO L225 Difference]: With dead ends: 2331 [2021-08-12 20:09:45,548 INFO L226 Difference]: Without dead ends: 2304 [2021-08-12 20:09:45,549 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:09:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-08-12 20:09:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1734. [2021-08-12 20:09:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3744950952106176) internal successors, (5848), 1733 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-08-12 20:09:46,041 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-08-12 20:09:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:46,041 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-08-12 20:09:46,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:46,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-08-12 20:09:46,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:46,044 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:46,044 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:46,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-08-12 20:09:46,244 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:46,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:46,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1537750790, now seen corresponding path program 50 times [2021-08-12 20:09:46,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:46,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654304135] [2021-08-12 20:09:46,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:46,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654304135] [2021-08-12 20:09:46,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654304135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279705105] [2021-08-12 20:09:46,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:46,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:09:46,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:46,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:09:46,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:46,500 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:09:46,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-08-12 20:09:46,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:46,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:46,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:46,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:17 [2021-08-12 20:09:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:46,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279705105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:46,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:46,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:09:46,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686580674] [2021-08-12 20:09:46,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:09:46,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:09:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:46,548 INFO L87 Difference]: Start difference. First operand 1734 states and 5848 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:49,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:49,102 INFO L93 Difference]: Finished difference Result 2283 states and 7558 transitions. [2021-08-12 20:09:49,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 20:09:49,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:49,107 INFO L225 Difference]: With dead ends: 2283 [2021-08-12 20:09:49,107 INFO L226 Difference]: Without dead ends: 2266 [2021-08-12 20:09:49,108 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-08-12 20:09:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-08-12 20:09:49,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1734. [2021-08-12 20:09:49,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.3744950952106176) internal successors, (5848), 1733 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5848 transitions. [2021-08-12 20:09:49,621 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5848 transitions. Word has length 26 [2021-08-12 20:09:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:49,621 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5848 transitions. [2021-08-12 20:09:49,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5848 transitions. [2021-08-12 20:09:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:49,623 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:49,623 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:49,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:49,824 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:49,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1909155608, now seen corresponding path program 56 times [2021-08-12 20:09:49,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:49,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849509223] [2021-08-12 20:09:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:50,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:50,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849509223] [2021-08-12 20:09:50,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849509223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:50,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540818141] [2021-08-12 20:09:50,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:50,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:09:50,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:50,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 20:09:50,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:50,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:50,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:50,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:50,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:50,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-12 20:09:50,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:50,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:50,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:50,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:15 [2021-08-12 20:09:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:50,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540818141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:50,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:50,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:09:50,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572487051] [2021-08-12 20:09:50,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:09:50,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:50,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:09:50,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:09:50,213 INFO L87 Difference]: Start difference. First operand 1734 states and 5848 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:53,008 INFO L93 Difference]: Finished difference Result 2267 states and 7367 transitions. [2021-08-12 20:09:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 20:09:53,008 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:53,013 INFO L225 Difference]: With dead ends: 2267 [2021-08-12 20:09:53,013 INFO L226 Difference]: Without dead ends: 2220 [2021-08-12 20:09:53,013 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 556.1ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:09:53,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-08-12 20:09:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1752. [2021-08-12 20:09:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.366647629925757) internal successors, (5895), 1751 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5895 transitions. [2021-08-12 20:09:53,530 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5895 transitions. Word has length 26 [2021-08-12 20:09:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:53,530 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5895 transitions. [2021-08-12 20:09:53,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5895 transitions. [2021-08-12 20:09:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:53,532 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:53,532 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:53,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:53,745 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:53,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:53,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1847280054, now seen corresponding path program 57 times [2021-08-12 20:09:53,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:53,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74410715] [2021-08-12 20:09:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:53,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:53,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74410715] [2021-08-12 20:09:53,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74410715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:53,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887796969] [2021-08-12 20:09:53,977 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 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 [2021-08-12 20:09:54,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 20:09:54,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:54,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:09:54,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:54,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:54,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:54,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:54,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:54,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-08-12 20:09:54,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:09:54,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:54,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:54,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-08-12 20:09:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:54,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887796969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:54,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:54,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:09:54,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727302090] [2021-08-12 20:09:54,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:09:54,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:09:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:09:54,210 INFO L87 Difference]: Start difference. First operand 1752 states and 5895 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:09:58,201 INFO L93 Difference]: Finished difference Result 2448 states and 7988 transitions. [2021-08-12 20:09:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 20:09:58,202 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:09:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:09:58,207 INFO L225 Difference]: With dead ends: 2448 [2021-08-12 20:09:58,207 INFO L226 Difference]: Without dead ends: 2431 [2021-08-12 20:09:58,207 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1268.1ms TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 20:09:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-08-12 20:09:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1746. [2021-08-12 20:09:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 3.3650429799426935) internal successors, (5872), 1745 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5872 transitions. [2021-08-12 20:09:58,754 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5872 transitions. Word has length 26 [2021-08-12 20:09:58,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:09:58,754 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 5872 transitions. [2021-08-12 20:09:58,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:09:58,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5872 transitions. [2021-08-12 20:09:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:09:58,756 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:09:58,756 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:09:58,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-08-12 20:09:58,957 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:09:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:09:58,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1872442310, now seen corresponding path program 58 times [2021-08-12 20:09:58,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:09:58,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159140824] [2021-08-12 20:09:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:09:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:09:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:59,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:09:59,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159140824] [2021-08-12 20:09:59,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159140824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:59,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095663993] [2021-08-12 20:09:59,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:09:59,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:09:59,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:09:59,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:09:59,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:09:59,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:59,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:59,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:09:59,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:09:59,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:09:59,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:09:59,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:09:59,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:09:59,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:09:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:09:59,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095663993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:09:59,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:09:59,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-08-12 20:09:59,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139305582] [2021-08-12 20:09:59,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:09:59,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:09:59,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:09:59,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:09:59,273 INFO L87 Difference]: Start difference. First operand 1746 states and 5872 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:01,729 INFO L93 Difference]: Finished difference Result 2061 states and 6677 transitions. [2021-08-12 20:10:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:10:01,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:10:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:01,734 INFO L225 Difference]: With dead ends: 2061 [2021-08-12 20:10:01,734 INFO L226 Difference]: Without dead ends: 2037 [2021-08-12 20:10:01,735 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-08-12 20:10:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-08-12 20:10:02,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1748. [2021-08-12 20:10:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.36519748139668) internal successors, (5879), 1747 states have internal predecessors, (5879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 5879 transitions. [2021-08-12 20:10:02,267 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 5879 transitions. Word has length 26 [2021-08-12 20:10:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:02,268 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 5879 transitions. [2021-08-12 20:10:02,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:02,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 5879 transitions. [2021-08-12 20:10:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:10:02,270 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:02,270 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:02,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:02,470 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash -804567746, now seen corresponding path program 59 times [2021-08-12 20:10:02,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:02,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762645374] [2021-08-12 20:10:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:02,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:02,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762645374] [2021-08-12 20:10:02,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762645374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:02,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034020592] [2021-08-12 20:10:02,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:02,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:10:02,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:02,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:10:02,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:02,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:02,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:02,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:02,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:02,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-08-12 20:10:02,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:10:02,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:02,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:10:02,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:33 [2021-08-12 20:10:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:02,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034020592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:02,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:02,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:10:02,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869605723] [2021-08-12 20:10:02,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:10:02,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:02,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:10:02,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:10:02,924 INFO L87 Difference]: Start difference. First operand 1748 states and 5879 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:06,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:06,171 INFO L93 Difference]: Finished difference Result 2320 states and 7613 transitions. [2021-08-12 20:10:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:10:06,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:10:06,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:06,177 INFO L225 Difference]: With dead ends: 2320 [2021-08-12 20:10:06,177 INFO L226 Difference]: Without dead ends: 2276 [2021-08-12 20:10:06,177 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 831.0ms TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 20:10:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-08-12 20:10:06,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 1772. [2021-08-12 20:10:06,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.3585544889892716) internal successors, (5948), 1771 states have internal predecessors, (5948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 5948 transitions. [2021-08-12 20:10:06,735 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 5948 transitions. Word has length 26 [2021-08-12 20:10:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:06,735 INFO L482 AbstractCegarLoop]: Abstraction has 1772 states and 5948 transitions. [2021-08-12 20:10:06,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 5948 transitions. [2021-08-12 20:10:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:10:06,738 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:06,738 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:06,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:06,938 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:06,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:06,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1162419966, now seen corresponding path program 60 times [2021-08-12 20:10:06,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:06,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31972996] [2021-08-12 20:10:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:07,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31972996] [2021-08-12 20:10:07,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31972996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999995357] [2021-08-12 20:10:07,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 20:10:07,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:10:07,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:07,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:10:07,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:07,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:10:07,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:10:07,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:10:07,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:10:07,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:07,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:10:07,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:10:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:07,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999995357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:07,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:07,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-08-12 20:10:07,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621186482] [2021-08-12 20:10:07,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:10:07,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:07,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:10:07,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:10:07,286 INFO L87 Difference]: Start difference. First operand 1772 states and 5948 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:10,085 INFO L93 Difference]: Finished difference Result 2211 states and 7267 transitions. [2021-08-12 20:10:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 20:10:10,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:10:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:10,090 INFO L225 Difference]: With dead ends: 2211 [2021-08-12 20:10:10,090 INFO L226 Difference]: Without dead ends: 2178 [2021-08-12 20:10:10,091 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 489.9ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-08-12 20:10:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2021-08-12 20:10:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1768. [2021-08-12 20:10:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.3604980192416525) internal successors, (5938), 1767 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-08-12 20:10:10,677 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-08-12 20:10:10,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:10,677 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-08-12 20:10:10,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:10,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-08-12 20:10:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:10:10,679 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:10,680 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:10,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:10,880 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:10,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1833133118, now seen corresponding path program 61 times [2021-08-12 20:10:10,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:10,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412276089] [2021-08-12 20:10:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:11,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:11,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412276089] [2021-08-12 20:10:11,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412276089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:11,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226394045] [2021-08-12 20:10:11,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:11,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:10:11,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:11,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:11,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:10:11,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:10:11,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:10:11,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:10:11,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:11,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:10:11,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:10:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:11,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226394045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:11,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:11,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-08-12 20:10:11,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482832699] [2021-08-12 20:10:11,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:10:11,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:11,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:10:11,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:10:11,217 INFO L87 Difference]: Start difference. First operand 1768 states and 5938 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:13,991 INFO L93 Difference]: Finished difference Result 2200 states and 7244 transitions. [2021-08-12 20:10:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 20:10:13,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:10:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:13,996 INFO L225 Difference]: With dead ends: 2200 [2021-08-12 20:10:13,996 INFO L226 Difference]: Without dead ends: 2183 [2021-08-12 20:10:13,997 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-08-12 20:10:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-08-12 20:10:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 1768. [2021-08-12 20:10:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.3604980192416525) internal successors, (5938), 1767 states have internal predecessors, (5938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:14,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5938 transitions. [2021-08-12 20:10:14,571 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5938 transitions. Word has length 26 [2021-08-12 20:10:14,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:14,571 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5938 transitions. [2021-08-12 20:10:14,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:14,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5938 transitions. [2021-08-12 20:10:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:10:14,574 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:14,574 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:14,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-08-12 20:10:14,775 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:14,775 INFO L82 PathProgramCache]: Analyzing trace with hash 179857598, now seen corresponding path program 51 times [2021-08-12 20:10:14,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:14,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150764693] [2021-08-12 20:10:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:14,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:14,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150764693] [2021-08-12 20:10:14,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150764693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:14,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238735252] [2021-08-12 20:10:14,952 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 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 [2021-08-12 20:10:14,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:10:14,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:14,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:10:14,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:15,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:10:15,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:15,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:10:15,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:10:15,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:15,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:10:15,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-08-12 20:10:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:15,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238735252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:15,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:15,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:10:15,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355663096] [2021-08-12 20:10:15,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:10:15,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:15,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:10:15,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:10:15,162 INFO L87 Difference]: Start difference. First operand 1768 states and 5938 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:18,826 INFO L93 Difference]: Finished difference Result 2388 states and 7758 transitions. [2021-08-12 20:10:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:10:18,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:10:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:18,833 INFO L225 Difference]: With dead ends: 2388 [2021-08-12 20:10:18,833 INFO L226 Difference]: Without dead ends: 2371 [2021-08-12 20:10:18,833 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 707.5ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-12 20:10:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-08-12 20:10:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1779. [2021-08-12 20:10:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.361079865016873) internal successors, (5976), 1778 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 5976 transitions. [2021-08-12 20:10:19,494 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 5976 transitions. Word has length 26 [2021-08-12 20:10:19,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:19,494 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 5976 transitions. [2021-08-12 20:10:19,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:19,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 5976 transitions. [2021-08-12 20:10:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:10:19,496 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:19,496 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:19,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:19,697 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1730239162, now seen corresponding path program 62 times [2021-08-12 20:10:19,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:19,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916222177] [2021-08-12 20:10:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:19,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:19,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916222177] [2021-08-12 20:10:19,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916222177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:19,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977175039] [2021-08-12 20:10:19,848 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 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 [2021-08-12 20:10:19,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:10:19,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:19,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:10:19,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:20,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:10:20,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:20,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:10:20,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:10:20,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:10:20,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:20,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:10:20,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:10:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:20,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977175039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:20,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:20,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-12 20:10:20,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303712535] [2021-08-12 20:10:20,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:10:20,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:20,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:10:20,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:10:20,045 INFO L87 Difference]: Start difference. First operand 1779 states and 5976 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:24,486 INFO L93 Difference]: Finished difference Result 2672 states and 8466 transitions. [2021-08-12 20:10:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 20:10:24,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:10:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:24,492 INFO L225 Difference]: With dead ends: 2672 [2021-08-12 20:10:24,492 INFO L226 Difference]: Without dead ends: 2648 [2021-08-12 20:10:24,492 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 664.4ms TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 20:10:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-08-12 20:10:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1831. [2021-08-12 20:10:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1830 states have (on average 3.3666666666666667) internal successors, (6161), 1830 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 6161 transitions. [2021-08-12 20:10:25,106 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 6161 transitions. Word has length 26 [2021-08-12 20:10:25,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:25,106 INFO L482 AbstractCegarLoop]: Abstraction has 1831 states and 6161 transitions. [2021-08-12 20:10:25,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 6161 transitions. [2021-08-12 20:10:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:10:25,108 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:25,108 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:25,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:25,309 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:25,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:25,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1769727974, now seen corresponding path program 52 times [2021-08-12 20:10:25,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:25,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372864694] [2021-08-12 20:10:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:25,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:25,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372864694] [2021-08-12 20:10:25,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372864694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:25,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674786096] [2021-08-12 20:10:25,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:25,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:10:25,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:25,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:10:25,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:25,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:10:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:25,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 20:10:25,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:10:25,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:25,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:10:25,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-08-12 20:10:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:25,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674786096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:25,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:25,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:10:25,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497575960] [2021-08-12 20:10:25,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:10:25,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:25,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:10:25,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:10:25,794 INFO L87 Difference]: Start difference. First operand 1831 states and 6161 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:29,720 INFO L93 Difference]: Finished difference Result 2549 states and 8277 transitions. [2021-08-12 20:10:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 20:10:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:10:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:29,725 INFO L225 Difference]: With dead ends: 2549 [2021-08-12 20:10:29,726 INFO L226 Difference]: Without dead ends: 2532 [2021-08-12 20:10:29,726 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 833.3ms TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 20:10:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-08-12 20:10:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1836. [2021-08-12 20:10:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1835 states have (on average 3.3678474114441417) internal successors, (6180), 1835 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 6180 transitions. [2021-08-12 20:10:30,328 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 6180 transitions. Word has length 26 [2021-08-12 20:10:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:30,328 INFO L482 AbstractCegarLoop]: Abstraction has 1836 states and 6180 transitions. [2021-08-12 20:10:30,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 6180 transitions. [2021-08-12 20:10:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:10:30,331 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:30,331 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:30,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:30,532 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:30,532 INFO L82 PathProgramCache]: Analyzing trace with hash 152195194, now seen corresponding path program 53 times [2021-08-12 20:10:30,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:30,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138786833] [2021-08-12 20:10:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:30,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:30,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138786833] [2021-08-12 20:10:30,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138786833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:30,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778692173] [2021-08-12 20:10:30,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 20:10:30,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:10:30,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:30,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 20:10:30,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:30,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:30,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-08-12 20:10:30,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:10:30,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:30,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:10:30,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:21 [2021-08-12 20:10:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:30,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778692173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:30,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:30,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:10:30,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941691832] [2021-08-12 20:10:30,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:10:30,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:30,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:10:30,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:10:30,886 INFO L87 Difference]: Start difference. First operand 1836 states and 6180 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:35,548 INFO L93 Difference]: Finished difference Result 2826 states and 9167 transitions. [2021-08-12 20:10:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 20:10:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:10:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:35,555 INFO L225 Difference]: With dead ends: 2826 [2021-08-12 20:10:35,556 INFO L226 Difference]: Without dead ends: 2809 [2021-08-12 20:10:35,556 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 803.3ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 20:10:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-08-12 20:10:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 1827. [2021-08-12 20:10:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.3663745892661554) internal successors, (6147), 1826 states have internal predecessors, (6147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6147 transitions. [2021-08-12 20:10:36,318 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6147 transitions. Word has length 26 [2021-08-12 20:10:36,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:36,319 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6147 transitions. [2021-08-12 20:10:36,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6147 transitions. [2021-08-12 20:10:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:10:36,321 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:36,321 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:36,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:36,522 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:36,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1956232686, now seen corresponding path program 63 times [2021-08-12 20:10:36,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:36,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680562716] [2021-08-12 20:10:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:36,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:36,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680562716] [2021-08-12 20:10:36,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680562716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:36,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003050230] [2021-08-12 20:10:36,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:36,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 20:10:36,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:36,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:10:36,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:36,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:36,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:36,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:10:36,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:10:36,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:10:36,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:10:36,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:36,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:10:36,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:10:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:36,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003050230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:36,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:36,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-12 20:10:36,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367996065] [2021-08-12 20:10:36,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:10:36,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:36,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:10:36,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:10:36,847 INFO L87 Difference]: Start difference. First operand 1827 states and 6147 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:42,233 INFO L93 Difference]: Finished difference Result 3160 states and 10103 transitions. [2021-08-12 20:10:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 20:10:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:10:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:42,240 INFO L225 Difference]: With dead ends: 3160 [2021-08-12 20:10:42,240 INFO L226 Difference]: Without dead ends: 3128 [2021-08-12 20:10:42,241 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 666.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 20:10:42,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3128 states. [2021-08-12 20:10:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3128 to 1885. [2021-08-12 20:10:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.3694267515923566) internal successors, (6348), 1884 states have internal predecessors, (6348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6348 transitions. [2021-08-12 20:10:43,066 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6348 transitions. Word has length 26 [2021-08-12 20:10:43,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:43,066 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6348 transitions. [2021-08-12 20:10:43,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:43,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6348 transitions. [2021-08-12 20:10:43,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:10:43,069 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:43,069 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:43,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:43,270 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:43,270 INFO L82 PathProgramCache]: Analyzing trace with hash -505085958, now seen corresponding path program 64 times [2021-08-12 20:10:43,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:43,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469981215] [2021-08-12 20:10:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:43,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:43,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469981215] [2021-08-12 20:10:43,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469981215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:43,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501747504] [2021-08-12 20:10:43,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:10:43,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:10:43,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:10:43,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:43,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:43,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:43,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:43,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-08-12 20:10:43,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:10:43,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:43,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:10:43,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-08-12 20:10:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:43,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501747504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:43,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:43,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-12 20:10:43,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260969196] [2021-08-12 20:10:43,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:10:43,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:43,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:10:43,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:10:43,613 INFO L87 Difference]: Start difference. First operand 1885 states and 6348 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:50,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:50,489 INFO L93 Difference]: Finished difference Result 3604 states and 11426 transitions. [2021-08-12 20:10:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 20:10:50,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:10:50,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:50,497 INFO L225 Difference]: With dead ends: 3604 [2021-08-12 20:10:50,497 INFO L226 Difference]: Without dead ends: 3558 [2021-08-12 20:10:50,497 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 998.6ms TimeCoverageRelationStatistics Valid=345, Invalid=1295, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 20:10:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2021-08-12 20:10:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 1897. [2021-08-12 20:10:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1896 states have (on average 3.37289029535865) internal successors, (6395), 1896 states have internal predecessors, (6395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 6395 transitions. [2021-08-12 20:10:51,143 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 6395 transitions. Word has length 26 [2021-08-12 20:10:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:51,143 INFO L482 AbstractCegarLoop]: Abstraction has 1897 states and 6395 transitions. [2021-08-12 20:10:51,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 6395 transitions. [2021-08-12 20:10:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:10:51,146 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:51,146 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:51,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-08-12 20:10:51,346 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:51,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1345416738, now seen corresponding path program 54 times [2021-08-12 20:10:51,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:51,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248732555] [2021-08-12 20:10:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:51,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:51,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248732555] [2021-08-12 20:10:51,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248732555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:51,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218243451] [2021-08-12 20:10:51,498 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 [2021-08-12 20:10:51,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:10:51,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:10:51,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:10:51,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:51,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:51,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-08-12 20:10:51,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:10:51,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:51,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:10:51,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:22 [2021-08-12 20:10:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:51,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218243451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:51,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:51,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:10:51,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062440663] [2021-08-12 20:10:51,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:10:51,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:51,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:10:51,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:10:51,708 INFO L87 Difference]: Start difference. First operand 1897 states and 6395 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:10:56,402 INFO L93 Difference]: Finished difference Result 2549 states and 8410 transitions. [2021-08-12 20:10:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 20:10:56,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:10:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:10:56,409 INFO L225 Difference]: With dead ends: 2549 [2021-08-12 20:10:56,409 INFO L226 Difference]: Without dead ends: 2532 [2021-08-12 20:10:56,410 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 975.9ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 20:10:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2021-08-12 20:10:57,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 1907. [2021-08-12 20:10:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 3.3698845750262327) internal successors, (6423), 1906 states have internal predecessors, (6423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 6423 transitions. [2021-08-12 20:10:57,217 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 6423 transitions. Word has length 26 [2021-08-12 20:10:57,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:10:57,218 INFO L482 AbstractCegarLoop]: Abstraction has 1907 states and 6423 transitions. [2021-08-12 20:10:57,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:10:57,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 6423 transitions. [2021-08-12 20:10:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:10:57,221 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:10:57,221 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:10:57,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable284 [2021-08-12 20:10:57,421 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:10:57,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:10:57,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1962058946, now seen corresponding path program 55 times [2021-08-12 20:10:57,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:10:57,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894052617] [2021-08-12 20:10:57,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:10:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:57,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:10:57,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894052617] [2021-08-12 20:10:57,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894052617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:57,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893302202] [2021-08-12 20:10:57,593 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 [2021-08-12 20:10:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:10:57,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:10:57,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:10:57,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:10:57,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:57,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-08-12 20:10:57,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:10:57,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:10:57,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-08-12 20:10:57,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:75 [2021-08-12 20:10:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:10:57,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893302202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:10:57,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:10:57,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 20:10:57,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205714488] [2021-08-12 20:10:57,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:10:57,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:10:57,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:10:57,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:10:57,861 INFO L87 Difference]: Start difference. First operand 1907 states and 6423 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:02,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:02,239 INFO L93 Difference]: Finished difference Result 2692 states and 8824 transitions. [2021-08-12 20:11:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 20:11:02,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:11:02,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:02,246 INFO L225 Difference]: With dead ends: 2692 [2021-08-12 20:11:02,247 INFO L226 Difference]: Without dead ends: 2665 [2021-08-12 20:11:02,247 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 20:11:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-08-12 20:11:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1893. [2021-08-12 20:11:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.374735729386892) internal successors, (6385), 1892 states have internal predecessors, (6385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6385 transitions. [2021-08-12 20:11:03,052 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6385 transitions. Word has length 26 [2021-08-12 20:11:03,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:03,052 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6385 transitions. [2021-08-12 20:11:03,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6385 transitions. [2021-08-12 20:11:03,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:11:03,055 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:03,055 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:03,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:03,257 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:03,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash 935709652, now seen corresponding path program 65 times [2021-08-12 20:11:03,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:03,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135076906] [2021-08-12 20:11:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:03,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:03,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135076906] [2021-08-12 20:11:03,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135076906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:03,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636510503] [2021-08-12 20:11:03,409 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 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 [2021-08-12 20:11:03,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 20:11:03,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:03,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:11:03,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:03,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:11:03,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:11:03,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:11:03,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:11:03,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:11:03,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:03,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:11:03,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:11:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:03,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636510503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:03,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:03,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-12 20:11:03,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321511012] [2021-08-12 20:11:03,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:11:03,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:11:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:11:03,625 INFO L87 Difference]: Start difference. First operand 1893 states and 6385 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:07,739 INFO L93 Difference]: Finished difference Result 2562 states and 8377 transitions. [2021-08-12 20:11:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 20:11:07,739 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:11:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:07,744 INFO L225 Difference]: With dead ends: 2562 [2021-08-12 20:11:07,744 INFO L226 Difference]: Without dead ends: 2538 [2021-08-12 20:11:07,745 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 20:11:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-08-12 20:11:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1893. [2021-08-12 20:11:08,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 3.375264270613108) internal successors, (6386), 1892 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 6386 transitions. [2021-08-12 20:11:08,354 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 6386 transitions. Word has length 26 [2021-08-12 20:11:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:08,354 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 6386 transitions. [2021-08-12 20:11:08,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:08,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 6386 transitions. [2021-08-12 20:11:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:11:08,356 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:08,357 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:08,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:08,557 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:08,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1778019666, now seen corresponding path program 66 times [2021-08-12 20:11:08,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:08,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286058500] [2021-08-12 20:11:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:08,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:08,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286058500] [2021-08-12 20:11:08,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286058500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:08,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511905954] [2021-08-12 20:11:08,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 20:11:08,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 20:11:08,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:08,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 20:11:08,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:08,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:11:08,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:11:08,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:08,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-12 20:11:08,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:11:08,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:08,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:11:08,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:26 [2021-08-12 20:11:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:08,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511905954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:08,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:08,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-12 20:11:08,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798345645] [2021-08-12 20:11:08,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:11:08,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:08,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:11:08,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:11:08,976 INFO L87 Difference]: Start difference. First operand 1893 states and 6386 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:14,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:14,524 INFO L93 Difference]: Finished difference Result 3123 states and 9986 transitions. [2021-08-12 20:11:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 20:11:14,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:11:14,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:14,531 INFO L225 Difference]: With dead ends: 3123 [2021-08-12 20:11:14,531 INFO L226 Difference]: Without dead ends: 3055 [2021-08-12 20:11:14,531 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1199.3ms TimeCoverageRelationStatistics Valid=387, Invalid=1593, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 20:11:14,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-08-12 20:11:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 1882. [2021-08-12 20:11:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.3694843168527377) internal successors, (6338), 1881 states have internal predecessors, (6338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6338 transitions. [2021-08-12 20:11:15,152 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6338 transitions. Word has length 26 [2021-08-12 20:11:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:15,152 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6338 transitions. [2021-08-12 20:11:15,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:15,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6338 transitions. [2021-08-12 20:11:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:11:15,155 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:15,156 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:15,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-08-12 20:11:15,356 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:15,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1066719206, now seen corresponding path program 56 times [2021-08-12 20:11:15,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:15,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252191150] [2021-08-12 20:11:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:15,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:15,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252191150] [2021-08-12 20:11:15,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252191150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:15,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15746000] [2021-08-12 20:11:15,497 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 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 [2021-08-12 20:11:15,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:11:15,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:15,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:11:15,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:11:15,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:15,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-08-12 20:11:15,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:11:15,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:15,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:11:15,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:17 [2021-08-12 20:11:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:15,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15746000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:15,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:15,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:11:15,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822987943] [2021-08-12 20:11:15,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:11:15,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:15,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:11:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:11:15,681 INFO L87 Difference]: Start difference. First operand 1882 states and 6338 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:19,297 INFO L93 Difference]: Finished difference Result 2563 states and 8456 transitions. [2021-08-12 20:11:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 20:11:19,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:11:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:19,302 INFO L225 Difference]: With dead ends: 2563 [2021-08-12 20:11:19,303 INFO L226 Difference]: Without dead ends: 2546 [2021-08-12 20:11:19,303 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 685.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 20:11:19,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-08-12 20:11:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1884. [2021-08-12 20:11:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 3.365374402549124) internal successors, (6337), 1883 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 6337 transitions. [2021-08-12 20:11:19,921 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 6337 transitions. Word has length 26 [2021-08-12 20:11:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:19,921 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 6337 transitions. [2021-08-12 20:11:19,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 6337 transitions. [2021-08-12 20:11:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:11:19,923 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:19,923 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:20,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:20,124 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:20,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:20,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2054210818, now seen corresponding path program 57 times [2021-08-12 20:11:20,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:20,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408091158] [2021-08-12 20:11:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:20,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:20,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408091158] [2021-08-12 20:11:20,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408091158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:20,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474049037] [2021-08-12 20:11:20,234 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 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 [2021-08-12 20:11:20,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:11:20,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:20,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 20:11:20,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:11:20,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:20,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-08-12 20:11:20,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:11:20,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:20,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-08-12 20:11:20,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:67 [2021-08-12 20:11:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:20,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474049037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:20,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:20,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:11:20,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502388872] [2021-08-12 20:11:20,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:11:20,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:20,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:11:20,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:11:20,507 INFO L87 Difference]: Start difference. First operand 1884 states and 6337 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:23,812 INFO L93 Difference]: Finished difference Result 2554 states and 8399 transitions. [2021-08-12 20:11:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 20:11:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:11:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:23,818 INFO L225 Difference]: With dead ends: 2554 [2021-08-12 20:11:23,818 INFO L226 Difference]: Without dead ends: 2527 [2021-08-12 20:11:23,818 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 492.3ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-08-12 20:11:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-08-12 20:11:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 1871. [2021-08-12 20:11:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.36524064171123) internal successors, (6293), 1870 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6293 transitions. [2021-08-12 20:11:24,530 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6293 transitions. Word has length 26 [2021-08-12 20:11:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:24,531 INFO L482 AbstractCegarLoop]: Abstraction has 1871 states and 6293 transitions. [2021-08-12 20:11:24,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6293 transitions. [2021-08-12 20:11:24,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:11:24,533 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:24,533 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:24,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-08-12 20:11:24,734 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:24,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:24,734 INFO L82 PathProgramCache]: Analyzing trace with hash 243784254, now seen corresponding path program 58 times [2021-08-12 20:11:24,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:24,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714767529] [2021-08-12 20:11:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:24,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:24,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714767529] [2021-08-12 20:11:24,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714767529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:24,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471728903] [2021-08-12 20:11:24,852 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 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 [2021-08-12 20:11:24,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:11:24,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:24,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 20:11:24,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:25,015 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-12 20:11:25,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 54 [2021-08-12 20:11:25,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:11:25,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:25,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:11:25,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2021-08-12 20:11:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:25,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471728903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:25,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:25,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-12 20:11:25,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253219464] [2021-08-12 20:11:25,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 20:11:25,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:25,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 20:11:25,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-12 20:11:25,064 INFO L87 Difference]: Start difference. First operand 1871 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:28,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:28,147 INFO L93 Difference]: Finished difference Result 2464 states and 8142 transitions. [2021-08-12 20:11:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:11:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:11:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:28,153 INFO L225 Difference]: With dead ends: 2464 [2021-08-12 20:11:28,153 INFO L226 Difference]: Without dead ends: 2447 [2021-08-12 20:11:28,153 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-08-12 20:11:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-08-12 20:11:28,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1865. [2021-08-12 20:11:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1864 states have (on average 3.3664163090128754) internal successors, (6275), 1864 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 6275 transitions. [2021-08-12 20:11:28,784 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 6275 transitions. Word has length 26 [2021-08-12 20:11:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:28,784 INFO L482 AbstractCegarLoop]: Abstraction has 1865 states and 6275 transitions. [2021-08-12 20:11:28,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:28,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 6275 transitions. [2021-08-12 20:11:28,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:11:28,786 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:28,786 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:28,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-08-12 20:11:28,987 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:28,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1210206466, now seen corresponding path program 67 times [2021-08-12 20:11:28,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:28,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584484172] [2021-08-12 20:11:28,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:29,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:29,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584484172] [2021-08-12 20:11:29,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584484172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:29,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486221403] [2021-08-12 20:11:29,166 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 [2021-08-12 20:11:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:29,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:11:29,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:29,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:11:29,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:11:29,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 20:11:29,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-08-12 20:11:29,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:11:29,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:29,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:11:29,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:7 [2021-08-12 20:11:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:29,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486221403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:29,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:29,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-12 20:11:29,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438002972] [2021-08-12 20:11:29,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:11:29,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:29,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:11:29,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:11:29,328 INFO L87 Difference]: Start difference. First operand 1865 states and 6275 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:32,905 INFO L93 Difference]: Finished difference Result 2377 states and 7800 transitions. [2021-08-12 20:11:32,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 20:11:32,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:11:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:32,911 INFO L225 Difference]: With dead ends: 2377 [2021-08-12 20:11:32,911 INFO L226 Difference]: Without dead ends: 2356 [2021-08-12 20:11:32,911 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2021-08-12 20:11:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-08-12 20:11:33,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1855. [2021-08-12 20:11:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1854 states have (on average 3.366774541531823) internal successors, (6242), 1854 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6242 transitions. [2021-08-12 20:11:33,650 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6242 transitions. Word has length 26 [2021-08-12 20:11:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:33,650 INFO L482 AbstractCegarLoop]: Abstraction has 1855 states and 6242 transitions. [2021-08-12 20:11:33,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6242 transitions. [2021-08-12 20:11:33,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:11:33,652 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:33,652 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:33,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-08-12 20:11:33,869 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash -89207746, now seen corresponding path program 68 times [2021-08-12 20:11:33,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:33,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669216290] [2021-08-12 20:11:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:34,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:34,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669216290] [2021-08-12 20:11:34,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669216290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:34,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531591042] [2021-08-12 20:11:34,044 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 [2021-08-12 20:11:34,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:11:34,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:34,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:11:34,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:34,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:11:34,239 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-08-12 20:11:34,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 78 [2021-08-12 20:11:34,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 20:11:34,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:34,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:11:34,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:22 [2021-08-12 20:11:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:34,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531591042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:34,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:34,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-12 20:11:34,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423785199] [2021-08-12 20:11:34,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 20:11:34,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:34,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 20:11:34,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-12 20:11:34,299 INFO L87 Difference]: Start difference. First operand 1855 states and 6242 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:38,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:38,429 INFO L93 Difference]: Finished difference Result 2480 states and 8171 transitions. [2021-08-12 20:11:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 20:11:38,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:11:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:38,436 INFO L225 Difference]: With dead ends: 2480 [2021-08-12 20:11:38,436 INFO L226 Difference]: Without dead ends: 2463 [2021-08-12 20:11:38,436 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 699.8ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 20:11:38,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-08-12 20:11:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1857. [2021-08-12 20:11:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.3685344827586206) internal successors, (6252), 1856 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-08-12 20:11:39,199 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-08-12 20:11:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:39,199 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-08-12 20:11:39,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-08-12 20:11:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-12 20:11:39,202 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:39,202 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:39,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:39,417 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash 503651198, now seen corresponding path program 69 times [2021-08-12 20:11:39,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:39,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248298797] [2021-08-12 20:11:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:39,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:39,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248298797] [2021-08-12 20:11:39,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248298797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:39,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047154909] [2021-08-12 20:11:39,579 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 [2021-08-12 20:11:39,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:11:39,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:39,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 20:11:39,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:39,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:11:39,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 20:11:39,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:39,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-08-12 20:11:39,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 20:11:39,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 20:11:39,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 20:11:39,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-08-12 20:11:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:39,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047154909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:39,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:39,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-12 20:11:39,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786577159] [2021-08-12 20:11:39,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:11:39,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:39,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:11:39,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:11:39,790 INFO L87 Difference]: Start difference. First operand 1857 states and 6252 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:43,933 INFO L93 Difference]: Finished difference Result 2628 states and 8590 transitions. [2021-08-12 20:11:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 20:11:43,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-12 20:11:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:43,939 INFO L225 Difference]: With dead ends: 2628 [2021-08-12 20:11:43,939 INFO L226 Difference]: Without dead ends: 2596 [2021-08-12 20:11:43,940 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 662.1ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 20:11:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-12 20:11:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1857. [2021-08-12 20:11:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 3.3685344827586206) internal successors, (6252), 1856 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 6252 transitions. [2021-08-12 20:11:44,671 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 6252 transitions. Word has length 26 [2021-08-12 20:11:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:44,672 INFO L482 AbstractCegarLoop]: Abstraction has 1857 states and 6252 transitions. [2021-08-12 20:11:44,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 6252 transitions. [2021-08-12 20:11:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 20:11:44,675 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:44,675 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:44,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-08-12 20:11:44,875 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:44,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1868598568, now seen corresponding path program 59 times [2021-08-12 20:11:44,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:44,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122903104] [2021-08-12 20:11:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:44,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:44,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122903104] [2021-08-12 20:11:44,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122903104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:44,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937133303] [2021-08-12 20:11:44,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:44,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 20:11:44,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:44,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:11:44,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:45,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937133303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:45,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:45,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 20:11:45,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072176120] [2021-08-12 20:11:45,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:11:45,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:45,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:11:45,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:11:45,053 INFO L87 Difference]: Start difference. First operand 1857 states and 6252 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:11:53,461 INFO L93 Difference]: Finished difference Result 4836 states and 15034 transitions. [2021-08-12 20:11:53,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 20:11:53,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 20:11:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:11:53,471 INFO L225 Difference]: With dead ends: 4836 [2021-08-12 20:11:53,471 INFO L226 Difference]: Without dead ends: 4803 [2021-08-12 20:11:53,472 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-08-12 20:11:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-08-12 20:11:54,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 2054. [2021-08-12 20:11:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.4305893813930832) internal successors, (7043), 2053 states have internal predecessors, (7043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 7043 transitions. [2021-08-12 20:11:54,231 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 7043 transitions. Word has length 28 [2021-08-12 20:11:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:11:54,231 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 7043 transitions. [2021-08-12 20:11:54,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:11:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 7043 transitions. [2021-08-12 20:11:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 20:11:54,234 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:11:54,234 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:11:54,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-08-12 20:11:54,435 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:11:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:11:54,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1450049884, now seen corresponding path program 60 times [2021-08-12 20:11:54,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:11:54,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790208732] [2021-08-12 20:11:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:11:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:11:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:54,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:11:54,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790208732] [2021-08-12 20:11:54,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790208732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:54,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016742980] [2021-08-12 20:11:54,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:11:54,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 20:11:54,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:11:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:11:54,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:11:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:11:54,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016742980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:11:54,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:11:54,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-12 20:11:54,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961671936] [2021-08-12 20:11:54,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:11:54,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:11:54,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:11:54,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:11:54,617 INFO L87 Difference]: Start difference. First operand 2054 states and 7043 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:12:05,797 INFO L93 Difference]: Finished difference Result 6419 states and 19576 transitions. [2021-08-12 20:12:05,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-12 20:12:05,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 20:12:05,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:12:05,809 INFO L225 Difference]: With dead ends: 6419 [2021-08-12 20:12:05,809 INFO L226 Difference]: Without dead ends: 6390 [2021-08-12 20:12:05,810 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 739.1ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-08-12 20:12:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6390 states. [2021-08-12 20:12:06,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6390 to 2065. [2021-08-12 20:12:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 3.438468992248062) internal successors, (7097), 2064 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 7097 transitions. [2021-08-12 20:12:06,560 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 7097 transitions. Word has length 28 [2021-08-12 20:12:06,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:12:06,560 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 7097 transitions. [2021-08-12 20:12:06,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:06,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 7097 transitions. [2021-08-12 20:12:06,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 20:12:06,562 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:12:06,562 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:12:06,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-08-12 20:12:06,763 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:12:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:12:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2017001964, now seen corresponding path program 61 times [2021-08-12 20:12:06,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:12:06,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430249161] [2021-08-12 20:12:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:12:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:12:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:06,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:12:06,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430249161] [2021-08-12 20:12:06,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430249161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:06,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113623777] [2021-08-12 20:12:06,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:12:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:12:06,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:12:06,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:12:06,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:06,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113623777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:06,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:12:06,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-12 20:12:06,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106400935] [2021-08-12 20:12:06,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:12:06,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:12:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:12:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:12:06,932 INFO L87 Difference]: Start difference. First operand 2065 states and 7097 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:12:16,862 INFO L93 Difference]: Finished difference Result 5816 states and 18140 transitions. [2021-08-12 20:12:16,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-12 20:12:16,863 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 20:12:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:12:16,872 INFO L225 Difference]: With dead ends: 5816 [2021-08-12 20:12:16,872 INFO L226 Difference]: Without dead ends: 5783 [2021-08-12 20:12:16,873 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 698.0ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-08-12 20:12:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2021-08-12 20:12:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 2013. [2021-08-12 20:12:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 3.412027833001988) internal successors, (6865), 2012 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 6865 transitions. [2021-08-12 20:12:17,715 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 6865 transitions. Word has length 28 [2021-08-12 20:12:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:12:17,716 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 6865 transitions. [2021-08-12 20:12:17,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 6865 transitions. [2021-08-12 20:12:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 20:12:17,719 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:12:17,719 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:12:17,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable323,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:12:17,919 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:12:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:12:17,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1095937010, now seen corresponding path program 62 times [2021-08-12 20:12:17,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:12:17,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271471046] [2021-08-12 20:12:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:12:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:12:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:17,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:12:17,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271471046] [2021-08-12 20:12:17,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271471046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:17,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116033317] [2021-08-12 20:12:17,962 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 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 [2021-08-12 20:12:17,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 20:12:17,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:12:17,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:12:17,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:12:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:18,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116033317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:18,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:12:18,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 20:12:18,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822394643] [2021-08-12 20:12:18,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 20:12:18,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:12:18,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 20:12:18,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-12 20:12:18,098 INFO L87 Difference]: Start difference. First operand 2013 states and 6865 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:12:28,658 INFO L93 Difference]: Finished difference Result 4930 states and 15087 transitions. [2021-08-12 20:12:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-12 20:12:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 20:12:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:12:28,669 INFO L225 Difference]: With dead ends: 4930 [2021-08-12 20:12:28,669 INFO L226 Difference]: Without dead ends: 4901 [2021-08-12 20:12:28,670 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 667.5ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-08-12 20:12:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-08-12 20:12:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 2023. [2021-08-12 20:12:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.408011869436202) internal successors, (6891), 2022 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 6891 transitions. [2021-08-12 20:12:29,589 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 6891 transitions. Word has length 28 [2021-08-12 20:12:29,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:12:29,589 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 6891 transitions. [2021-08-12 20:12:29,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 6891 transitions. [2021-08-12 20:12:29,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 20:12:29,591 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:12:29,591 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:12:29,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:12:29,792 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:12:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:12:29,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1989400020, now seen corresponding path program 70 times [2021-08-12 20:12:29,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:12:29,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661811946] [2021-08-12 20:12:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:12:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:12:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:29,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:12:29,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661811946] [2021-08-12 20:12:29,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661811946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:29,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50606880] [2021-08-12 20:12:29,837 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 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 [2021-08-12 20:12:29,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:12:29,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:12:29,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:12:29,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:12:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:29,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50606880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:29,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:12:29,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-12 20:12:29,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503693507] [2021-08-12 20:12:29,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 20:12:29,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:12:29,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 20:12:29,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:12:29,953 INFO L87 Difference]: Start difference. First operand 2023 states and 6891 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:12:37,275 INFO L93 Difference]: Finished difference Result 4355 states and 13542 transitions. [2021-08-12 20:12:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 20:12:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 20:12:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:12:37,282 INFO L225 Difference]: With dead ends: 4355 [2021-08-12 20:12:37,282 INFO L226 Difference]: Without dead ends: 4322 [2021-08-12 20:12:37,283 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 20:12:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4322 states. [2021-08-12 20:12:38,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4322 to 2079. [2021-08-12 20:12:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 3.3946102021174207) internal successors, (7054), 2078 states have internal predecessors, (7054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 7054 transitions. [2021-08-12 20:12:38,072 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 7054 transitions. Word has length 28 [2021-08-12 20:12:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:12:38,072 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 7054 transitions. [2021-08-12 20:12:38,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 7054 transitions. [2021-08-12 20:12:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 20:12:38,075 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:12:38,075 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:12:38,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-08-12 20:12:38,275 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:12:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:12:38,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1848031388, now seen corresponding path program 63 times [2021-08-12 20:12:38,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:12:38,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846706049] [2021-08-12 20:12:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:12:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:12:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:12:38,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:12:38,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846706049] [2021-08-12 20:12:38,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846706049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:38,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214288660] [2021-08-12 20:12:38,300 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 [2021-08-12 20:12:38,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 20:12:38,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:12:38,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 20:12:38,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:12:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 20:12:38,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214288660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:38,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:12:38,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-12 20:12:38,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258303749] [2021-08-12 20:12:38,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 20:12:38,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:12:38,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 20:12:38,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-12 20:12:38,396 INFO L87 Difference]: Start difference. First operand 2079 states and 7054 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:12:43,759 INFO L93 Difference]: Finished difference Result 3700 states and 11961 transitions. [2021-08-12 20:12:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 20:12:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 20:12:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:12:43,766 INFO L225 Difference]: With dead ends: 3700 [2021-08-12 20:12:43,766 INFO L226 Difference]: Without dead ends: 3593 [2021-08-12 20:12:43,766 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-08-12 20:12:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-08-12 20:12:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 2470. [2021-08-12 20:12:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.4726609963547994) internal successors, (8574), 2469 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:44,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8574 transitions. [2021-08-12 20:12:44,993 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8574 transitions. Word has length 28 [2021-08-12 20:12:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:12:44,993 INFO L482 AbstractCegarLoop]: Abstraction has 2470 states and 8574 transitions. [2021-08-12 20:12:44,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8574 transitions. [2021-08-12 20:12:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 20:12:44,997 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:12:44,997 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:12:45,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-08-12 20:12:45,197 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:12:45,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:12:45,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1411062680, now seen corresponding path program 64 times [2021-08-12 20:12:45,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:12:45,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606043111] [2021-08-12 20:12:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:12:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:12:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:45,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:12:45,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606043111] [2021-08-12 20:12:45,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606043111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:45,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126195705] [2021-08-12 20:12:45,232 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 [2021-08-12 20:12:45,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 20:12:45,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:12:45,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 20:12:45,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:12:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:45,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126195705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:45,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:12:45,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-12 20:12:45,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569160747] [2021-08-12 20:12:45,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 20:12:45,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:12:45,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 20:12:45,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-12 20:12:45,342 INFO L87 Difference]: Start difference. First operand 2470 states and 8574 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:12:53,194 INFO L93 Difference]: Finished difference Result 4335 states and 13738 transitions. [2021-08-12 20:12:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-12 20:12:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 20:12:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:12:53,203 INFO L225 Difference]: With dead ends: 4335 [2021-08-12 20:12:53,203 INFO L226 Difference]: Without dead ends: 4209 [2021-08-12 20:12:53,203 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 20:12:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2021-08-12 20:12:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 2635. [2021-08-12 20:12:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 3.4935459377372817) internal successors, (9202), 2634 states have internal predecessors, (9202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 9202 transitions. [2021-08-12 20:12:54,315 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 9202 transitions. Word has length 28 [2021-08-12 20:12:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:12:54,315 INFO L482 AbstractCegarLoop]: Abstraction has 2635 states and 9202 transitions. [2021-08-12 20:12:54,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:12:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 9202 transitions. [2021-08-12 20:12:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 20:12:54,318 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:12:54,318 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:12:54,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:12:54,519 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:12:54,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:12:54,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1904037996, now seen corresponding path program 71 times [2021-08-12 20:12:54,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:12:54,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465822838] [2021-08-12 20:12:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:12:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:12:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:54,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:12:54,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465822838] [2021-08-12 20:12:54,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465822838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:54,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999223286] [2021-08-12 20:12:54,563 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 [2021-08-12 20:12:54,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 20:12:54,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:12:54,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 20:12:54,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:12:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:12:54,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999223286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:12:54,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:12:54,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-12 20:12:54,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754793458] [2021-08-12 20:12:54,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 20:12:54,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:12:54,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 20:12:54,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-12 20:12:54,676 INFO L87 Difference]: Start difference. First operand 2635 states and 9202 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:03,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:13:03,606 INFO L93 Difference]: Finished difference Result 5268 states and 17449 transitions. [2021-08-12 20:13:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 20:13:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 20:13:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:13:03,616 INFO L225 Difference]: With dead ends: 5268 [2021-08-12 20:13:03,616 INFO L226 Difference]: Without dead ends: 5007 [2021-08-12 20:13:03,617 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 20:13:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5007 states. [2021-08-12 20:13:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5007 to 3294. [2021-08-12 20:13:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3293 states have (on average 3.5204980261160035) internal successors, (11593), 3293 states have internal predecessors, (11593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 11593 transitions. [2021-08-12 20:13:05,118 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 11593 transitions. Word has length 28 [2021-08-12 20:13:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:13:05,118 INFO L482 AbstractCegarLoop]: Abstraction has 3294 states and 11593 transitions. [2021-08-12 20:13:05,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 11593 transitions. [2021-08-12 20:13:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 20:13:05,122 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:13:05,122 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:13:05,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-08-12 20:13:05,323 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:13:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:13:05,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1347815140, now seen corresponding path program 65 times [2021-08-12 20:13:05,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:13:05,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971275905] [2021-08-12 20:13:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:13:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:13:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:13:05,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:13:05,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971275905] [2021-08-12 20:13:05,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971275905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:05,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084494302] [2021-08-12 20:13:05,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:13:05,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 20:13:05,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:13:05,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 20:13:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:13:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:13:05,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084494302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:05,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:13:05,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-12 20:13:05,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927109967] [2021-08-12 20:13:05,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 20:13:05,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:13:05,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 20:13:05,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:13:05,475 INFO L87 Difference]: Start difference. First operand 3294 states and 11593 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:13:16,015 INFO L93 Difference]: Finished difference Result 5616 states and 17760 transitions. [2021-08-12 20:13:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 20:13:16,015 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 20:13:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:13:16,027 INFO L225 Difference]: With dead ends: 5616 [2021-08-12 20:13:16,027 INFO L226 Difference]: Without dead ends: 5511 [2021-08-12 20:13:16,028 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 418.9ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 20:13:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-08-12 20:13:17,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 3312. [2021-08-12 20:13:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 3311 states have (on average 3.5258230141951072) internal successors, (11674), 3311 states have internal predecessors, (11674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 11674 transitions. [2021-08-12 20:13:17,872 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 11674 transitions. Word has length 28 [2021-08-12 20:13:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:13:17,872 INFO L482 AbstractCegarLoop]: Abstraction has 3312 states and 11674 transitions. [2021-08-12 20:13:17,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 11674 transitions. [2021-08-12 20:13:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 20:13:17,877 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:13:17,877 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:13:18,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:13:18,078 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:13:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:13:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash -675402358, now seen corresponding path program 66 times [2021-08-12 20:13:18,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:13:18,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140793715] [2021-08-12 20:13:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:13:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:13:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:13:18,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:13:18,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140793715] [2021-08-12 20:13:18,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140793715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:18,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244434412] [2021-08-12 20:13:18,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:13:18,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 20:13:18,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 20:13:18,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 20:13:18,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:13:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:13:18,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244434412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:18,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:13:18,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-12 20:13:18,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838329483] [2021-08-12 20:13:18,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 20:13:18,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:13:18,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 20:13:18,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-12 20:13:18,230 INFO L87 Difference]: Start difference. First operand 3312 states and 11674 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:28,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 20:13:28,715 INFO L93 Difference]: Finished difference Result 5671 states and 17950 transitions. [2021-08-12 20:13:28,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 20:13:28,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 20:13:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 20:13:28,726 INFO L225 Difference]: With dead ends: 5671 [2021-08-12 20:13:28,727 INFO L226 Difference]: Without dead ends: 5561 [2021-08-12 20:13:28,727 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 432.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 20:13:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-08-12 20:13:30,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3305. [2021-08-12 20:13:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 3304 states have (on average 3.5320823244552058) internal successors, (11670), 3304 states have internal predecessors, (11670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 11670 transitions. [2021-08-12 20:13:30,473 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 11670 transitions. Word has length 28 [2021-08-12 20:13:30,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 20:13:30,473 INFO L482 AbstractCegarLoop]: Abstraction has 3305 states and 11670 transitions. [2021-08-12 20:13:30,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 20:13:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 11670 transitions. [2021-08-12 20:13:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 20:13:30,479 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 20:13:30,479 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 20:13:30,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-08-12 20:13:30,679 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 20:13:30,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 20:13:30,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1724201280, now seen corresponding path program 67 times [2021-08-12 20:13:30,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 20:13:30,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324459646] [2021-08-12 20:13:30,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 20:13:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:13:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:13:30,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 20:13:30,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324459646] [2021-08-12 20:13:30,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324459646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:30,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376437100] [2021-08-12 20:13:30,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 20:13:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 20:13:30,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 20:13:30,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 20:13:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 20:13:30,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376437100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 20:13:30,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 20:13:30,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-12 20:13:30,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537088799] [2021-08-12 20:13:30,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 20:13:30,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 20:13:30,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 20:13:30,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-12 20:13:30,821 INFO L87 Difference]: Start difference. First operand 3305 states and 11670 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-12 20:13:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 20:13:36,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-08-12 20:13:36,723 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 20:13:36,726 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 20:13:36,727 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 20:13:36,727 INFO L202 PluginConnector]: Adding new model sum-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 08:13:36 BasicIcfg [2021-08-12 20:13:36,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 20:13:36,728 INFO L168 Benchmark]: Toolchain (without parser) took 560359.58 ms. Allocated memory was 200.3 MB in the beginning and 1.1 GB in the end (delta: 893.4 MB). Free memory was 180.1 MB in the beginning and 970.3 MB in the end (delta: -790.2 MB). Peak memory consumption was 103.9 MB. Max. memory is 8.0 GB. [2021-08-12 20:13:36,728 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 200.3 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 20:13:36,728 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.86 ms. Allocated memory is still 200.3 MB. Free memory was 180.1 MB in the beginning and 178.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 20:13:36,728 INFO L168 Benchmark]: Boogie Preprocessor took 19.45 ms. Allocated memory is still 200.3 MB. Free memory was 178.7 MB in the beginning and 177.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 20:13:36,728 INFO L168 Benchmark]: RCFGBuilder took 286.70 ms. Allocated memory is still 200.3 MB. Free memory was 177.7 MB in the beginning and 164.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-12 20:13:36,728 INFO L168 Benchmark]: TraceAbstraction took 560028.01 ms. Allocated memory was 200.3 MB in the beginning and 1.1 GB in the end (delta: 893.4 MB). Free memory was 164.4 MB in the beginning and 970.3 MB in the end (delta: -805.9 MB). Peak memory consumption was 88.2 MB. Max. memory is 8.0 GB. [2021-08-12 20:13:36,728 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 200.3 MB. Free memory is still 181.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.86 ms. Allocated memory is still 200.3 MB. Free memory was 180.1 MB in the beginning and 178.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.45 ms. Allocated memory is still 200.3 MB. Free memory was 178.7 MB in the beginning and 177.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 286.70 ms. Allocated memory is still 200.3 MB. Free memory was 177.7 MB in the beginning and 164.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 560028.01 ms. Allocated memory was 200.3 MB in the beginning and 1.1 GB in the end (delta: 893.4 MB). Free memory was 164.4 MB in the beginning and 970.3 MB in the end (delta: -805.9 MB). Peak memory consumption was 88.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3305states) and FLOYD_HOARE automaton (currently 39 states, 13 states before enhancement),while ReachableStatesComputation was computing reachable states (2849 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 559930.4ms, OverallIterations: 140, TraceHistogramMax: 3, EmptinessCheckTime: 300.7ms, AutomataDifference: 430131.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6038 SDtfs, 27339 SDslu, 44720 SDs, 0 SdLazy, 81716 SolverSat, 4661 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 39061.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7549 GetRequests, 2634 SyntacticMatches, 215 SemanticMatches, 4700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54590 ImplicationChecksByTransitivity, 103860.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3312occurred in iteration=138, InterpolantAutomatonStates: 3626, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53337.3ms AutomataMinimizationTime, 139 MinimizatonAttempts, 117730 StatesRemovedByMinimization, 138 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 442.2ms SsaConstructionTime, 1373.7ms SatisfiabilityAnalysisTime, 42519.7ms InterpolantComputationTime, 7090 NumberOfCodeBlocks, 7090 NumberOfCodeBlocksAsserted, 450 NumberOfCheckSat, 6812 ConstructedInterpolants, 141 QuantifiedInterpolants, 102308 SizeOfPredicates, 791 NumberOfNonLiveVariables, 9229 ConjunctsInSsa, 2842 ConjunctsInUnsatCore, 278 InterpolantComputations, 2 PerfectInterpolantSequences, 191/1779 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