/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:49:17,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:49:17,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:49:17,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 16:49:17,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 16:49:17,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 16:49:17,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 16:49:17,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 16:49:17,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 16:49:17,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 16:49:17,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 16:49:17,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 16:49:17,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 16:49:17,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 16:49:17,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 16:49:17,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 16:49:17,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 16:49:17,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 16:49:17,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 16:49:17,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 16:49:17,270 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 [2021-05-03 16:49:17,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:49:17,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:49:17,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:49:17,319 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:49:17,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:49:17,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:49:17,320 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:49:17,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:49:17,321 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:49:17,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:49:17,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:49:17,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:49:17,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:49:17,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:49:17,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:49:17,322 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:49:17,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:49:17,322 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:49:17,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:49:17,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:49:17,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:49:17,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:49:17,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:49:17,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:49:17,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:49:17,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:49:17,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:49:17,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:49:17,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:49:17,323 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:49:17,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:49:17,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:49:17,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:49:17,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:49:17,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:49:17,820 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:49:17,823 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:49:17,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl [2021-05-03 16:49:17,855 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl' [2021-05-03 16:49:17,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:49:17,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:49:17,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:49:17,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:49:17,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:49:17,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:49:17" (1/1) ... [2021-05-03 16:49:17,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:49:17" (1/1) ... [2021-05-03 16:49:17,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:49:17,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:49:17,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:49:17,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:49:17,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:49:17" (1/1) ... [2021-05-03 16:49:17,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:49:17" (1/1) ... [2021-05-03 16:49:17,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:49:17" (1/1) ... [2021-05-03 16:49:17,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:49:17" (1/1) ... [2021-05-03 16:49:17,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:49:17" (1/1) ... [2021-05-03 16:49:17,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:49:17" (1/1) ... [2021-05-03 16:49:17,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:49:17" (1/1) ... [2021-05-03 16:49:17,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:49:17,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:49:17,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:49:17,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:49:18,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:49:17" (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 [2021-05-03 16:49:18,070 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:49:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:49:18,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:49:18,071 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:49:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:49:18,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:49:18,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:49:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:49:18,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:49:18,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 16:49:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 16:49:18,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 16:49:18,073 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 16:49:18,268 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:49:18,269 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:49:18,271 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:49:18 BoogieIcfgContainer [2021-05-03 16:49:18,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:49:18,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:49:18,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:49:18,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:49:18,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:49:17" (1/2) ... [2021-05-03 16:49:18,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bee9353 and model type min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:49:18, skipping insertion in model container [2021-05-03 16:49:18,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:49:18" (2/2) ... [2021-05-03 16:49:18,279 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun-alt.wvr.bpl [2021-05-03 16:49:18,285 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:49:18,286 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:49:18,290 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:49:18,291 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:49:18,332 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 16:49:18,352 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 16:49:18,390 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:49:18,390 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:49:18,390 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:49:18,390 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:49:18,390 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:49:18,390 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:49:18,390 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:49:18,391 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:49:18,400 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-05-03 16:49:18,433 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) [2021-05-03 16:49:18,438 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) [2021-05-03 16:49:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:49:18,449 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:18,458 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:18,459 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:18,482 INFO L82 PathProgramCache]: Analyzing trace with hash -520695315, now seen corresponding path program 1 times [2021-05-03 16:49:18,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:18,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480685398] [2021-05-03 16:49:18,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:18,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480685398] [2021-05-03 16:49:18,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:49:18,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:49:18,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077863387] [2021-05-03 16:49:18,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:49:18,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:18,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:49:18,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:49:18,756 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:18,820 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-05-03 16:49:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:49:18,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 16:49:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:18,846 INFO L225 Difference]: With dead ends: 217 [2021-05-03 16:49:18,847 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 16:49:18,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:49:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 16:49:18,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-05-03 16:49:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-05-03 16:49:18,928 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-05-03 16:49:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:18,929 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-05-03 16:49:18,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-05-03 16:49:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:49:18,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:18,932 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:18,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:49:18,932 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:18,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:18,939 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-05-03 16:49:18,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:18,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604189238] [2021-05-03 16:49:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:49:19,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604189238] [2021-05-03 16:49:19,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:49:19,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:49:19,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451917133] [2021-05-03 16:49:19,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:49:19,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:19,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:49:19,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:49:19,063 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:19,146 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-05-03 16:49:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:49:19,147 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 [2021-05-03 16:49:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:19,151 INFO L225 Difference]: With dead ends: 158 [2021-05-03 16:49:19,151 INFO L226 Difference]: Without dead ends: 158 [2021-05-03 16:49:19,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:49:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-03 16:49:19,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-05-03 16:49:19,175 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) [2021-05-03 16:49:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-05-03 16:49:19,177 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-05-03 16:49:19,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:19,177 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-05-03 16:49:19,177 INFO L481 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) [2021-05-03 16:49:19,177 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-05-03 16:49:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:49:19,179 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:19,179 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:19,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 16:49:19,179 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:19,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:19,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1197401099, now seen corresponding path program 1 times [2021-05-03 16:49:19,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:19,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997008813] [2021-05-03 16:49:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:49:19,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997008813] [2021-05-03 16:49:19,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:49:19,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:49:19,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644821267] [2021-05-03 16:49:19,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 16:49:19,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:19,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 16:49:19,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:49:19,269 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:19,330 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-05-03 16:49:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:49:19,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 16:49:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:19,333 INFO L225 Difference]: With dead ends: 183 [2021-05-03 16:49:19,333 INFO L226 Difference]: Without dead ends: 183 [2021-05-03 16:49:19,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:49:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-03 16:49:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-05-03 16:49:19,341 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) [2021-05-03 16:49:19,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-05-03 16:49:19,343 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-05-03 16:49:19,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:19,343 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-05-03 16:49:19,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:19,344 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-05-03 16:49:19,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:49:19,346 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:19,346 INFO L551 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] [2021-05-03 16:49:19,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 16:49:19,346 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:19,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-05-03 16:49:19,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:19,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694001106] [2021-05-03 16:49:19,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:19,832 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-05-03 16:49:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:19,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694001106] [2021-05-03 16:49:19,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436095088] [2021-05-03 16:49:19,850 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 [2021-05-03 16:49:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:19,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:49:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:20,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:49:20,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:20,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-05-03 16:49:20,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:20,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-05-03 16:49:20,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:20,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:20,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:49:20,364 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:95, output treesize:17 [2021-05-03 16:49:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:20,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:20,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:49:20,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134893731] [2021-05-03 16:49:20,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:49:20,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:20,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:49:20,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:49:20,433 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:20,662 INFO L93 Difference]: Finished difference Result 298 states and 839 transitions. [2021-05-03 16:49:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:49:20,663 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:49:20,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:20,667 INFO L225 Difference]: With dead ends: 298 [2021-05-03 16:49:20,668 INFO L226 Difference]: Without dead ends: 283 [2021-05-03 16:49:20,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 546.8ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:49:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-03 16:49:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 224. [2021-05-03 16:49:20,690 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) [2021-05-03 16:49:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-05-03 16:49:20,694 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-05-03 16:49:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:20,694 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-05-03 16:49:20,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-05-03 16:49:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:49:20,702 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:20,702 INFO L551 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] [2021-05-03 16:49:20,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:20,921 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:20,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:20,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-05-03 16:49:20,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:20,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252991793] [2021-05-03 16:49:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:21,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252991793] [2021-05-03 16:49:21,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522177832] [2021-05-03 16:49:21,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:49:21,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:49:21,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:21,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:49:21,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:21,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:21,623 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 [2021-05-03 16:49:21,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:21,653 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:21,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-05-03 16:49:21,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:21,680 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:21,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-05-03 16:49:21,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:21,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:21,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:49:21,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:21,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:21,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:49:21,769 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:71 [2021-05-03 16:49:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:21,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:21,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-03 16:49:21,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732374371] [2021-05-03 16:49:21,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:49:21,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:21,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:49:21,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:49:21,906 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:22,540 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-05-03 16:49:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:49:22,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:49:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:22,543 INFO L225 Difference]: With dead ends: 374 [2021-05-03 16:49:22,544 INFO L226 Difference]: Without dead ends: 359 [2021-05-03 16:49:22,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 689.5ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:49:22,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-03 16:49:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-05-03 16:49:22,552 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) [2021-05-03 16:49:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-05-03 16:49:22,554 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-05-03 16:49:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:22,554 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-05-03 16:49:22,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-05-03 16:49:22,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:49:22,556 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:22,556 INFO L551 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] [2021-05-03 16:49:22,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:22,774 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:22,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-05-03 16:49:22,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:22,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594083640] [2021-05-03 16:49:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:22,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594083640] [2021-05-03 16:49:22,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281144943] [2021-05-03 16:49:22,990 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 [2021-05-03 16:49:23,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:49:23,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:23,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:49:23,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:23,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:49:23,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:23,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:49:23,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:23,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:49:23,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:23,179 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 18 treesize of output 12 [2021-05-03 16:49:23,181 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:23,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-05-03 16:49:23,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:23,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-05-03 16:49:23,193 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:23,209 INFO L628 ElimStorePlain]: treesize reduction 10, result has 63.0 percent of original size [2021-05-03 16:49:23,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:49:23,211 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:130, output treesize:17 [2021-05-03 16:49:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:23,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:23,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 16:49:23,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050946469] [2021-05-03 16:49:23,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:49:23,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:23,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:49:23,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:49:23,268 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:23,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:23,516 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-05-03 16:49:23,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:49:23,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:49:23,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:23,521 INFO L225 Difference]: With dead ends: 363 [2021-05-03 16:49:23,522 INFO L226 Difference]: Without dead ends: 348 [2021-05-03 16:49:23,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 272.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:49:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-03 16:49:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-05-03 16:49:23,543 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) [2021-05-03 16:49:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-05-03 16:49:23,545 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-05-03 16:49:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:23,545 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-05-03 16:49:23,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-05-03 16:49:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:49:23,547 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:23,547 INFO L551 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] [2021-05-03 16:49:23,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-03 16:49:23,766 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:23,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:23,766 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-05-03 16:49:23,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:23,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416658347] [2021-05-03 16:49:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:23,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416658347] [2021-05-03 16:49:23,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68980048] [2021-05-03 16:49:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:23,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:49:23,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:23,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:49:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:24,297 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:24,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-05-03 16:49:24,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:24,310 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 [2021-05-03 16:49:24,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:24,381 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:24,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-05-03 16:49:24,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:24,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:49:24,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:24,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:49:24,452 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-05-03 16:49:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:24,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:24,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:49:24,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946477481] [2021-05-03 16:49:24,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:24,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:24,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:24,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:24,578 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:24,932 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-05-03 16:49:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:49:24,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:49:24,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:24,935 INFO L225 Difference]: With dead ends: 425 [2021-05-03 16:49:24,936 INFO L226 Difference]: Without dead ends: 410 [2021-05-03 16:49:24,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:49:24,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-03 16:49:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-05-03 16:49:24,945 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) [2021-05-03 16:49:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-05-03 16:49:24,946 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-05-03 16:49:24,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:24,948 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-05-03 16:49:24,948 INFO L481 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) [2021-05-03 16:49:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-05-03 16:49:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:24,950 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:24,950 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:25,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 16:49:25,165 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:25,165 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-05-03 16:49:25,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:25,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159488663] [2021-05-03 16:49:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:25,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159488663] [2021-05-03 16:49:25,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590534548] [2021-05-03 16:49:25,231 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 [2021-05-03 16:49:25,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:49:25,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:25,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:25,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:25,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:49:25,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128819331] [2021-05-03 16:49:25,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:49:25,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:25,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:49:25,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:49:25,389 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) [2021-05-03 16:49:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:25,862 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-05-03 16:49:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:49:25,862 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 [2021-05-03 16:49:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:25,866 INFO L225 Difference]: With dead ends: 619 [2021-05-03 16:49:25,866 INFO L226 Difference]: Without dead ends: 619 [2021-05-03 16:49:25,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:49:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-05-03 16:49:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-05-03 16:49:25,879 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) [2021-05-03 16:49:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-05-03 16:49:25,881 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-05-03 16:49:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:25,881 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-05-03 16:49:25,882 INFO L481 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) [2021-05-03 16:49:25,882 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-05-03 16:49:25,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:25,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:25,883 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:26,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 16:49:26,109 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:26,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-05-03 16:49:26,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:26,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115903005] [2021-05-03 16:49:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:26,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115903005] [2021-05-03 16:49:26,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969822115] [2021-05-03 16:49:26,190 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 [2021-05-03 16:49:26,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:49:26,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:26,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:26,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:26,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:26,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:26,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659346259] [2021-05-03 16:49:26,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:26,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:26,348 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) [2021-05-03 16:49:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:27,258 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-05-03 16:49:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:49:27,259 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 [2021-05-03 16:49:27,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:27,266 INFO L225 Difference]: With dead ends: 1078 [2021-05-03 16:49:27,267 INFO L226 Difference]: Without dead ends: 1078 [2021-05-03 16:49:27,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 582.5ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:49:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-05-03 16:49:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-05-03 16:49:27,289 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) [2021-05-03 16:49:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-05-03 16:49:27,291 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-05-03 16:49:27,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:27,291 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-05-03 16:49:27,292 INFO L481 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) [2021-05-03 16:49:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-05-03 16:49:27,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:27,294 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:27,294 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:27,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:27,509 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:27,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:27,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-05-03 16:49:27,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:27,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108558584] [2021-05-03 16:49:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:27,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108558584] [2021-05-03 16:49:27,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332827586] [2021-05-03 16:49:27,565 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 [2021-05-03 16:49:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:27,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:27,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:27,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:27,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:27,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740454716] [2021-05-03 16:49:27,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:27,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:27,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:27,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:27,702 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) [2021-05-03 16:49:28,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:28,555 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-05-03 16:49:28,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:49:28,556 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 [2021-05-03 16:49:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:28,561 INFO L225 Difference]: With dead ends: 951 [2021-05-03 16:49:28,561 INFO L226 Difference]: Without dead ends: 951 [2021-05-03 16:49:28,562 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 523.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:49:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-05-03 16:49:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-05-03 16:49:28,578 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) [2021-05-03 16:49:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-05-03 16:49:28,580 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-05-03 16:49:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:28,582 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-05-03 16:49:28,583 INFO L481 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) [2021-05-03 16:49:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-05-03 16:49:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:28,585 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:28,585 INFO L551 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] [2021-05-03 16:49:28,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 16:49:28,801 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:28,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:28,801 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-05-03 16:49:28,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:28,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101913296] [2021-05-03 16:49:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:49:28,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101913296] [2021-05-03 16:49:28,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161839653] [2021-05-03 16:49:28,852 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 [2021-05-03 16:49:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:49:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:49:28,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:28,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:49:28,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398330961] [2021-05-03 16:49:28,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:49:28,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:28,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:49:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:49:28,952 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) [2021-05-03 16:49:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:29,099 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-05-03 16:49:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:49:29,099 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 [2021-05-03 16:49:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:29,104 INFO L225 Difference]: With dead ends: 669 [2021-05-03 16:49:29,104 INFO L226 Difference]: Without dead ends: 663 [2021-05-03 16:49:29,105 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-05-03 16:49:29,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-05-03 16:49:29,122 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) [2021-05-03 16:49:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-05-03 16:49:29,125 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-05-03 16:49:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:29,125 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-05-03 16:49:29,126 INFO L481 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) [2021-05-03 16:49:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-05-03 16:49:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:29,128 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:29,128 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:29,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-03 16:49:29,349 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:29,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:29,349 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-05-03 16:49:29,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:29,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984386505] [2021-05-03 16:49:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984386505] [2021-05-03 16:49:29,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65197034] [2021-05-03 16:49:29,404 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 [2021-05-03 16:49:29,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:49:29,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:29,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:29,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:29,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:29,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:49:29,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927872426] [2021-05-03 16:49:29,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:29,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:29,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:29,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:29,526 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) [2021-05-03 16:49:29,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:29,751 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-05-03 16:49:29,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:49:29,752 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 [2021-05-03 16:49:29,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:29,757 INFO L225 Difference]: With dead ends: 710 [2021-05-03 16:49:29,757 INFO L226 Difference]: Without dead ends: 672 [2021-05-03 16:49:29,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:49:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-05-03 16:49:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-05-03 16:49:29,786 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) [2021-05-03 16:49:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-05-03 16:49:29,789 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-05-03 16:49:29,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:29,790 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-05-03 16:49:29,790 INFO L481 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) [2021-05-03 16:49:29,790 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-05-03 16:49:29,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:29,792 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:29,792 INFO L551 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] [2021-05-03 16:49:30,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 16:49:30,009 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:30,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-05-03 16:49:30,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:30,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712236951] [2021-05-03 16:49:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:49:30,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712236951] [2021-05-03 16:49:30,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690077206] [2021-05-03 16:49:30,044 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 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 [2021-05-03 16:49:30,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:49:30,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:49:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:49:30,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:30,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:49:30,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443694655] [2021-05-03 16:49:30,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:49:30,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:30,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:49:30,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:49:30,160 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) [2021-05-03 16:49:30,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:30,295 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-05-03 16:49:30,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:49:30,296 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 [2021-05-03 16:49:30,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:30,301 INFO L225 Difference]: With dead ends: 830 [2021-05-03 16:49:30,302 INFO L226 Difference]: Without dead ends: 830 [2021-05-03 16:49:30,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:30,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-05-03 16:49:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-05-03 16:49:30,322 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) [2021-05-03 16:49:30,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-05-03 16:49:30,326 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-05-03 16:49:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:30,326 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-05-03 16:49:30,326 INFO L481 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) [2021-05-03 16:49:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-05-03 16:49:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:30,329 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:30,329 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:30,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:30,531 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:30,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-05-03 16:49:30,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:30,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630950566] [2021-05-03 16:49:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:30,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630950566] [2021-05-03 16:49:30,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180763961] [2021-05-03 16:49:30,604 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 [2021-05-03 16:49:30,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:49:30,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:30,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:30,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:30,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:30,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:49:30,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086420514] [2021-05-03 16:49:30,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:49:30,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:30,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:49:30,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:49:30,757 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) [2021-05-03 16:49:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:31,121 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-05-03 16:49:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:49:31,122 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 [2021-05-03 16:49:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:31,129 INFO L225 Difference]: With dead ends: 1196 [2021-05-03 16:49:31,130 INFO L226 Difference]: Without dead ends: 1196 [2021-05-03 16:49:31,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:49:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-05-03 16:49:31,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-05-03 16:49:31,156 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) [2021-05-03 16:49:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-05-03 16:49:31,159 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-05-03 16:49:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:31,159 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-05-03 16:49:31,159 INFO L481 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) [2021-05-03 16:49:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-05-03 16:49:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:31,161 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:31,162 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:31,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-03 16:49:31,388 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:31,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:31,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-05-03 16:49:31,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:31,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509181951] [2021-05-03 16:49:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:31,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509181951] [2021-05-03 16:49:31,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738957289] [2021-05-03 16:49:31,451 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 [2021-05-03 16:49:31,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:49:31,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:31,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:31,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:31,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:31,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:49:31,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263714720] [2021-05-03 16:49:31,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:49:31,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:31,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:49:31,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:49:31,581 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) [2021-05-03 16:49:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:32,078 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-05-03 16:49:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:49:32,079 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 [2021-05-03 16:49:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:32,087 INFO L225 Difference]: With dead ends: 1492 [2021-05-03 16:49:32,087 INFO L226 Difference]: Without dead ends: 1492 [2021-05-03 16:49:32,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:49:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-05-03 16:49:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-05-03 16:49:32,117 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) [2021-05-03 16:49:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-05-03 16:49:32,121 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-05-03 16:49:32,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:32,121 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-05-03 16:49:32,121 INFO L481 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) [2021-05-03 16:49:32,121 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-05-03 16:49:32,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:32,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:32,123 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:32,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:32,337 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-05-03 16:49:32,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:32,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884260449] [2021-05-03 16:49:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:32,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884260449] [2021-05-03 16:49:32,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109610262] [2021-05-03 16:49:32,381 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 [2021-05-03 16:49:32,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:49:32,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:32,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:32,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:32,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:32,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:49:32,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241822609] [2021-05-03 16:49:32,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:32,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:32,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:32,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:32,499 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) [2021-05-03 16:49:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:32,742 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-05-03 16:49:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:49:32,743 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 [2021-05-03 16:49:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:32,751 INFO L225 Difference]: With dead ends: 1258 [2021-05-03 16:49:32,751 INFO L226 Difference]: Without dead ends: 1248 [2021-05-03 16:49:32,751 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:49:32,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-05-03 16:49:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-05-03 16:49:32,778 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) [2021-05-03 16:49:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-05-03 16:49:32,782 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-05-03 16:49:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:32,783 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-05-03 16:49:32,783 INFO L481 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) [2021-05-03 16:49:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-05-03 16:49:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:32,786 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:32,786 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:33,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-03 16:49:33,001 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:33,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-05-03 16:49:33,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:33,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333672229] [2021-05-03 16:49:33,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:33,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333672229] [2021-05-03 16:49:33,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408500571] [2021-05-03 16:49:33,050 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 [2021-05-03 16:49:33,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:49:33,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:33,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:33,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:33,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:33,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:49:33,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969756580] [2021-05-03 16:49:33,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:33,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:33,188 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) [2021-05-03 16:49:33,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:33,517 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-05-03 16:49:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:49:33,518 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 [2021-05-03 16:49:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:33,525 INFO L225 Difference]: With dead ends: 1329 [2021-05-03 16:49:33,526 INFO L226 Difference]: Without dead ends: 1329 [2021-05-03 16:49:33,526 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:49:33,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-05-03 16:49:33,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-05-03 16:49:33,558 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) [2021-05-03 16:49:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-05-03 16:49:33,562 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-05-03 16:49:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:33,562 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-05-03 16:49:33,563 INFO L481 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) [2021-05-03 16:49:33,563 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-05-03 16:49:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:33,565 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:33,565 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:33,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:33,781 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-05-03 16:49:33,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:33,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93385695] [2021-05-03 16:49:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:33,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93385695] [2021-05-03 16:49:33,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229980490] [2021-05-03 16:49:33,832 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 [2021-05-03 16:49:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:33,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:33,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:33,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:33,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:49:33,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860167456] [2021-05-03 16:49:33,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:49:33,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:33,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:49:33,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:49:33,930 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) [2021-05-03 16:49:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:34,305 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-05-03 16:49:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:49:34,306 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 [2021-05-03 16:49:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:34,313 INFO L225 Difference]: With dead ends: 1548 [2021-05-03 16:49:34,314 INFO L226 Difference]: Without dead ends: 1544 [2021-05-03 16:49:34,314 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:49:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-05-03 16:49:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-05-03 16:49:34,354 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) [2021-05-03 16:49:34,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-05-03 16:49:34,358 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-05-03 16:49:34,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:34,358 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-05-03 16:49:34,358 INFO L481 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) [2021-05-03 16:49:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-05-03 16:49:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:34,361 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:34,361 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:34,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-03 16:49:34,581 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:34,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-05-03 16:49:34,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:34,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693856926] [2021-05-03 16:49:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:34,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693856926] [2021-05-03 16:49:34,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858231615] [2021-05-03 16:49:34,632 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 [2021-05-03 16:49:34,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:49:34,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:34,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:34,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:34,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:34,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:34,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613732595] [2021-05-03 16:49:34,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:34,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:34,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:34,751 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) [2021-05-03 16:49:35,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:35,649 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-05-03 16:49:35,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:49:35,650 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 [2021-05-03 16:49:35,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:35,663 INFO L225 Difference]: With dead ends: 2734 [2021-05-03 16:49:35,663 INFO L226 Difference]: Without dead ends: 2734 [2021-05-03 16:49:35,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 532.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:49:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-05-03 16:49:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-05-03 16:49:35,708 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) [2021-05-03 16:49:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-05-03 16:49:35,712 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-05-03 16:49:35,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:35,712 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-05-03 16:49:35,713 INFO L481 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) [2021-05-03 16:49:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-05-03 16:49:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:35,716 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:35,716 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:35,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:35,941 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-05-03 16:49:35,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:35,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867593257] [2021-05-03 16:49:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:35,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867593257] [2021-05-03 16:49:35,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844607630] [2021-05-03 16:49:35,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:49:36,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:49:36,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:36,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:36,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:36,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:36,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098622555] [2021-05-03 16:49:36,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:36,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:36,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:36,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:36,151 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) [2021-05-03 16:49:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:36,983 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-05-03 16:49:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:49:36,984 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 [2021-05-03 16:49:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:36,995 INFO L225 Difference]: With dead ends: 2693 [2021-05-03 16:49:36,995 INFO L226 Difference]: Without dead ends: 2693 [2021-05-03 16:49:36,996 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 526.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:49:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-05-03 16:49:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-05-03 16:49:37,040 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) [2021-05-03 16:49:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-05-03 16:49:37,044 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-05-03 16:49:37,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:37,044 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-05-03 16:49:37,044 INFO L481 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) [2021-05-03 16:49:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-05-03 16:49:37,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:37,047 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:37,047 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:37,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-03 16:49:37,273 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-05-03 16:49:37,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:37,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074124652] [2021-05-03 16:49:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:37,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074124652] [2021-05-03 16:49:37,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896779610] [2021-05-03 16:49:37,316 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 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 [2021-05-03 16:49:37,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:49:37,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:37,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:37,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:49:37,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133052290] [2021-05-03 16:49:37,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:49:37,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:37,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:49:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:49:37,445 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) [2021-05-03 16:49:38,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:38,169 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-05-03 16:49:38,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:49:38,169 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 [2021-05-03 16:49:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:38,179 INFO L225 Difference]: With dead ends: 2677 [2021-05-03 16:49:38,179 INFO L226 Difference]: Without dead ends: 2677 [2021-05-03 16:49:38,180 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:49:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-05-03 16:49:38,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-05-03 16:49:38,219 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) [2021-05-03 16:49:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-05-03 16:49:38,222 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-05-03 16:49:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:38,222 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-05-03 16:49:38,222 INFO L481 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) [2021-05-03 16:49:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-05-03 16:49:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:38,225 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:38,225 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:38,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-03 16:49:38,450 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:38,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-05-03 16:49:38,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:38,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469331211] [2021-05-03 16:49:38,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:38,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469331211] [2021-05-03 16:49:38,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162018995] [2021-05-03 16:49:38,490 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) [2021-05-03 16:49:38,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:49:38,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:38,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:38,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:38,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:38,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:49:38,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218995765] [2021-05-03 16:49:38,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:49:38,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:38,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:49:38,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:49:38,595 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) [2021-05-03 16:49:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:39,267 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-05-03 16:49:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:49:39,268 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 [2021-05-03 16:49:39,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:39,276 INFO L225 Difference]: With dead ends: 2474 [2021-05-03 16:49:39,276 INFO L226 Difference]: Without dead ends: 2470 [2021-05-03 16:49:39,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 357.8ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:49:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-05-03 16:49:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-05-03 16:49:39,314 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) [2021-05-03 16:49:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-05-03 16:49:39,317 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-05-03 16:49:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:39,317 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-05-03 16:49:39,318 INFO L481 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) [2021-05-03 16:49:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-05-03 16:49:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:39,319 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:39,320 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:39,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-03 16:49:39,533 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:39,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-05-03 16:49:39,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:39,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428369577] [2021-05-03 16:49:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:39,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428369577] [2021-05-03 16:49:39,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875759023] [2021-05-03 16:49:39,573 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 [2021-05-03 16:49:39,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:49:39,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:39,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:39,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:39,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:39,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:39,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7003262] [2021-05-03 16:49:39,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:39,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:39,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:39,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:39,703 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) [2021-05-03 16:49:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:40,439 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-05-03 16:49:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:49:40,440 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 [2021-05-03 16:49:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:40,448 INFO L225 Difference]: With dead ends: 2514 [2021-05-03 16:49:40,449 INFO L226 Difference]: Without dead ends: 2514 [2021-05-03 16:49:40,449 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:49:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-05-03 16:49:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-05-03 16:49:40,490 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) [2021-05-03 16:49:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-05-03 16:49:40,494 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-05-03 16:49:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:40,494 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-05-03 16:49:40,494 INFO L481 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) [2021-05-03 16:49:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-05-03 16:49:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:40,497 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:40,497 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:40,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-03 16:49:40,720 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:40,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:40,721 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-05-03 16:49:40,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:40,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523702415] [2021-05-03 16:49:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:40,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523702415] [2021-05-03 16:49:40,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500080262] [2021-05-03 16:49:40,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:40,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:40,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:40,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:40,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:40,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161136789] [2021-05-03 16:49:40,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:40,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:40,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:40,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:40,890 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) [2021-05-03 16:49:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:41,563 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-05-03 16:49:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:49:41,563 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 [2021-05-03 16:49:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:41,572 INFO L225 Difference]: With dead ends: 2332 [2021-05-03 16:49:41,572 INFO L226 Difference]: Without dead ends: 2328 [2021-05-03 16:49:41,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:49:41,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-05-03 16:49:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-05-03 16:49:41,612 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) [2021-05-03 16:49:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-05-03 16:49:41,616 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-05-03 16:49:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:41,616 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-05-03 16:49:41,616 INFO L481 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) [2021-05-03 16:49:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-05-03 16:49:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:41,619 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:41,619 INFO L551 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] [2021-05-03 16:49:41,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:41,841 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:41,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-05-03 16:49:41,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:41,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095829582] [2021-05-03 16:49:41,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:49:41,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095829582] [2021-05-03 16:49:41,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418543874] [2021-05-03 16:49:41,881 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 [2021-05-03 16:49:41,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:49:41,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:41,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:49:41,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:49:41,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:41,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:49:41,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907254416] [2021-05-03 16:49:41,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:49:41,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:41,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:49:41,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:49:41,979 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) [2021-05-03 16:49:42,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:42,078 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-05-03 16:49:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:49:42,091 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 [2021-05-03 16:49:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:42,099 INFO L225 Difference]: With dead ends: 929 [2021-05-03 16:49:42,099 INFO L226 Difference]: Without dead ends: 929 [2021-05-03 16:49:42,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:49:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-05-03 16:49:42,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-05-03 16:49:42,140 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) [2021-05-03 16:49:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-05-03 16:49:42,143 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-05-03 16:49:42,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:42,144 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-05-03 16:49:42,144 INFO L481 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) [2021-05-03 16:49:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-05-03 16:49:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:42,147 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:42,147 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:42,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:42,373 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:42,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-05-03 16:49:42,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:42,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659315615] [2021-05-03 16:49:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:42,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659315615] [2021-05-03 16:49:42,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3492948] [2021-05-03 16:49:42,412 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 [2021-05-03 16:49:42,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:49:42,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:42,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:42,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:42,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:42,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 16:49:42,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637364392] [2021-05-03 16:49:42,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:49:42,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:42,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:49:42,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:49:42,492 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) [2021-05-03 16:49:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:42,789 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-05-03 16:49:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:49:42,790 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 [2021-05-03 16:49:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:42,794 INFO L225 Difference]: With dead ends: 1555 [2021-05-03 16:49:42,794 INFO L226 Difference]: Without dead ends: 1555 [2021-05-03 16:49:42,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:49:42,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-05-03 16:49:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-05-03 16:49:42,818 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) [2021-05-03 16:49:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-05-03 16:49:42,821 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-05-03 16:49:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:42,821 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-05-03 16:49:42,821 INFO L481 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) [2021-05-03 16:49:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-05-03 16:49:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:42,823 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:42,823 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:43,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-03 16:49:43,041 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:43,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:43,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-05-03 16:49:43,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:43,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487590562] [2021-05-03 16:49:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:43,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487590562] [2021-05-03 16:49:43,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661631769] [2021-05-03 16:49:43,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:49:43,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:49:43,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:43,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:43,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:43,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:43,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 16:49:43,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489539357] [2021-05-03 16:49:43,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:49:43,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:43,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:49:43,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:49:43,172 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) [2021-05-03 16:49:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:43,433 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-05-03 16:49:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:49:43,434 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 [2021-05-03 16:49:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:43,437 INFO L225 Difference]: With dead ends: 1605 [2021-05-03 16:49:43,437 INFO L226 Difference]: Without dead ends: 1605 [2021-05-03 16:49:43,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:49:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-05-03 16:49:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-05-03 16:49:43,462 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) [2021-05-03 16:49:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-05-03 16:49:43,465 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-05-03 16:49:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:43,465 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-05-03 16:49:43,466 INFO L481 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) [2021-05-03 16:49:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-05-03 16:49:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:43,468 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:43,468 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:43,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:43,681 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-05-03 16:49:43,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:43,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901821922] [2021-05-03 16:49:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:49:43,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901821922] [2021-05-03 16:49:43,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090398072] [2021-05-03 16:49:43,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:49:43,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:49:43,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:43,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:43,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:49:43,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:43,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 16:49:43,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112944301] [2021-05-03 16:49:43,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:49:43,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:43,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:49:43,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:49:43,788 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) [2021-05-03 16:49:43,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:43,979 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-05-03 16:49:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:49:43,979 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 [2021-05-03 16:49:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:44,009 INFO L225 Difference]: With dead ends: 1524 [2021-05-03 16:49:44,009 INFO L226 Difference]: Without dead ends: 1520 [2021-05-03 16:49:44,010 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:49:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-05-03 16:49:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-05-03 16:49:44,029 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) [2021-05-03 16:49:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-05-03 16:49:44,032 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-05-03 16:49:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:44,032 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-05-03 16:49:44,032 INFO L481 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) [2021-05-03 16:49:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-05-03 16:49:44,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:44,034 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:44,034 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:44,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-03 16:49:44,249 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-05-03 16:49:44,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:44,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589144188] [2021-05-03 16:49:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:44,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589144188] [2021-05-03 16:49:44,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616603746] [2021-05-03 16:49:44,288 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 [2021-05-03 16:49:44,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:49:44,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:44,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:44,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:44,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:44,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 16:49:44,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043491229] [2021-05-03 16:49:44,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:49:44,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:44,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:49:44,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:49:44,366 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) [2021-05-03 16:49:44,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:44,617 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-05-03 16:49:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:49:44,618 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 [2021-05-03 16:49:44,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:44,621 INFO L225 Difference]: With dead ends: 1508 [2021-05-03 16:49:44,621 INFO L226 Difference]: Without dead ends: 1496 [2021-05-03 16:49:44,622 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:49:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-05-03 16:49:44,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-05-03 16:49:44,643 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) [2021-05-03 16:49:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-05-03 16:49:44,647 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-05-03 16:49:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:44,647 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-05-03 16:49:44,647 INFO L481 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) [2021-05-03 16:49:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-05-03 16:49:44,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:44,650 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:44,650 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:44,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 16:49:44,877 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-05-03 16:49:44,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:44,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814546761] [2021-05-03 16:49:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:44,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814546761] [2021-05-03 16:49:44,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411573481] [2021-05-03 16:49:44,925 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 [2021-05-03 16:49:44,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:49:44,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:44,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:44,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:45,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:45,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:45,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412565973] [2021-05-03 16:49:45,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:45,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:45,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:45,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:45,044 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) [2021-05-03 16:49:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:45,619 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-05-03 16:49:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:49:45,620 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 [2021-05-03 16:49:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:45,627 INFO L225 Difference]: With dead ends: 2412 [2021-05-03 16:49:45,627 INFO L226 Difference]: Without dead ends: 2412 [2021-05-03 16:49:45,628 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:49:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-05-03 16:49:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-05-03 16:49:45,662 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) [2021-05-03 16:49:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-05-03 16:49:45,665 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-05-03 16:49:45,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:45,666 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-05-03 16:49:45,666 INFO L481 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) [2021-05-03 16:49:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-05-03 16:49:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:45,668 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:45,669 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:45,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-03 16:49:45,885 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:45,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:45,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-05-03 16:49:45,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:45,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936859815] [2021-05-03 16:49:45,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:45,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936859815] [2021-05-03 16:49:45,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403665692] [2021-05-03 16:49:45,927 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 [2021-05-03 16:49:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:45,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:45,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:46,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:46,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:46,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726565943] [2021-05-03 16:49:46,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:46,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:46,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:46,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:46,057 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) [2021-05-03 16:49:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:46,642 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-05-03 16:49:46,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:49:46,642 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 [2021-05-03 16:49:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:46,646 INFO L225 Difference]: With dead ends: 2335 [2021-05-03 16:49:46,647 INFO L226 Difference]: Without dead ends: 2335 [2021-05-03 16:49:46,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 357.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:49:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-05-03 16:49:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-05-03 16:49:46,670 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) [2021-05-03 16:49:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:49:46,673 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:49:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:46,673 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:49:46,673 INFO L481 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) [2021-05-03 16:49:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:49:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:46,676 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:46,677 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:46,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 16:49:46,887 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:46,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-05-03 16:49:46,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:46,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323483161] [2021-05-03 16:49:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:46,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323483161] [2021-05-03 16:49:46,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816094804] [2021-05-03 16:49:46,939 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 [2021-05-03 16:49:46,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:49:46,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:46,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:47,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:47,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:49:47,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178972454] [2021-05-03 16:49:47,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:49:47,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:49:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:49:47,083 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) [2021-05-03 16:49:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:47,537 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-05-03 16:49:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:49:47,539 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 [2021-05-03 16:49:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:47,544 INFO L225 Difference]: With dead ends: 2285 [2021-05-03 16:49:47,544 INFO L226 Difference]: Without dead ends: 2285 [2021-05-03 16:49:47,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:49:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-05-03 16:49:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-05-03 16:49:47,600 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) [2021-05-03 16:49:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-05-03 16:49:47,604 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-05-03 16:49:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:47,604 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-05-03 16:49:47,604 INFO L481 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) [2021-05-03 16:49:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-05-03 16:49:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:47,606 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:47,606 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:47,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 16:49:47,807 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:47,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-05-03 16:49:47,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:47,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079146688] [2021-05-03 16:49:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:47,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079146688] [2021-05-03 16:49:47,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362372475] [2021-05-03 16:49:47,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:49:47,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:49:47,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:47,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:47,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:47,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:49:47,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113262833] [2021-05-03 16:49:47,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:49:47,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:47,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:49:47,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:49:47,953 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) [2021-05-03 16:49:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:48,460 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-05-03 16:49:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:49:48,461 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 [2021-05-03 16:49:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:48,465 INFO L225 Difference]: With dead ends: 2176 [2021-05-03 16:49:48,465 INFO L226 Difference]: Without dead ends: 2172 [2021-05-03 16:49:48,466 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:49:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-05-03 16:49:48,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-05-03 16:49:48,500 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) [2021-05-03 16:49:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:49:48,503 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:49:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:48,503 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:49:48,503 INFO L481 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) [2021-05-03 16:49:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:49:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:48,506 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:48,506 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:48,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:48,707 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:48,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-05-03 16:49:48,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:48,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98152262] [2021-05-03 16:49:48,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:48,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98152262] [2021-05-03 16:49:48,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548103838] [2021-05-03 16:49:48,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:49:48,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:49:48,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:48,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:48,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:48,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:48,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:48,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964914024] [2021-05-03 16:49:48,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:48,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:48,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:48,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:48,900 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) [2021-05-03 16:49:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:49,373 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-05-03 16:49:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:49:49,374 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 [2021-05-03 16:49:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:49,380 INFO L225 Difference]: With dead ends: 2199 [2021-05-03 16:49:49,380 INFO L226 Difference]: Without dead ends: 2199 [2021-05-03 16:49:49,381 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:49:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-05-03 16:49:49,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-05-03 16:49:49,410 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) [2021-05-03 16:49:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-05-03 16:49:49,413 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-05-03 16:49:49,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:49,413 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-05-03 16:49:49,413 INFO L481 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) [2021-05-03 16:49:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-05-03 16:49:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:49,415 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:49,415 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:49,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:49,616 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:49,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:49,616 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-05-03 16:49:49,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:49,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432121900] [2021-05-03 16:49:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:49,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432121900] [2021-05-03 16:49:49,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205390693] [2021-05-03 16:49:49,671 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 [2021-05-03 16:49:49,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:49:49,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:49,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:49,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:49,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:49,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:49,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805375975] [2021-05-03 16:49:49,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:49,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:49,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:49,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:49,786 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) [2021-05-03 16:49:50,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:50,238 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-05-03 16:49:50,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:49:50,238 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 [2021-05-03 16:49:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:50,244 INFO L225 Difference]: With dead ends: 2156 [2021-05-03 16:49:50,244 INFO L226 Difference]: Without dead ends: 2152 [2021-05-03 16:49:50,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 289.8ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:49:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-05-03 16:49:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-05-03 16:49:50,280 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) [2021-05-03 16:49:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:49:50,284 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:49:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:50,285 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:49:50,285 INFO L481 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) [2021-05-03 16:49:50,285 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:49:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:50,288 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:50,288 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:50,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-03 16:49:50,513 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:50,513 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-05-03 16:49:50,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:50,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958613207] [2021-05-03 16:49:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:50,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958613207] [2021-05-03 16:49:50,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879838719] [2021-05-03 16:49:50,567 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) [2021-05-03 16:49:50,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:49:50,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:50,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:50,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:50,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:50,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:49:50,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864958463] [2021-05-03 16:49:50,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:49:50,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:49:50,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:49:50,682 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) [2021-05-03 16:49:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:51,089 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-05-03 16:49:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:49:51,090 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 [2021-05-03 16:49:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:51,094 INFO L225 Difference]: With dead ends: 2097 [2021-05-03 16:49:51,094 INFO L226 Difference]: Without dead ends: 2097 [2021-05-03 16:49:51,095 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:49:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-05-03 16:49:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-05-03 16:49:51,120 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) [2021-05-03 16:49:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-05-03 16:49:51,123 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-05-03 16:49:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:51,124 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-05-03 16:49:51,124 INFO L481 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) [2021-05-03 16:49:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-05-03 16:49:51,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:51,126 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:51,126 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:51,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:51,327 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:51,329 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-05-03 16:49:51,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:51,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645413116] [2021-05-03 16:49:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:51,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645413116] [2021-05-03 16:49:51,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620717598] [2021-05-03 16:49:51,390 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 [2021-05-03 16:49:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:51,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:51,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:51,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:49:51,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740313400] [2021-05-03 16:49:51,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:49:51,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:51,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:49:51,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:49:51,475 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) [2021-05-03 16:49:51,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:51,801 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-05-03 16:49:51,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:49:51,802 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 [2021-05-03 16:49:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:51,806 INFO L225 Difference]: With dead ends: 1963 [2021-05-03 16:49:51,806 INFO L226 Difference]: Without dead ends: 1959 [2021-05-03 16:49:51,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:49:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-05-03 16:49:51,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-05-03 16:49:51,835 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) [2021-05-03 16:49:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-05-03 16:49:51,839 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-05-03 16:49:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:51,839 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-05-03 16:49:51,839 INFO L481 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) [2021-05-03 16:49:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-05-03 16:49:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:51,842 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:51,842 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:52,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-03 16:49:52,065 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:52,065 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-05-03 16:49:52,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:52,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232691741] [2021-05-03 16:49:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:52,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232691741] [2021-05-03 16:49:52,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771960278] [2021-05-03 16:49:52,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:49:52,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:49:52,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:52,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:52,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:49:52,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971542207] [2021-05-03 16:49:52,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:49:52,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:52,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:49:52,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:49:52,211 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) [2021-05-03 16:49:52,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:52,512 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-05-03 16:49:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:49:52,513 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 [2021-05-03 16:49:52,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:52,516 INFO L225 Difference]: With dead ends: 1728 [2021-05-03 16:49:52,516 INFO L226 Difference]: Without dead ends: 1716 [2021-05-03 16:49:52,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:49:52,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-05-03 16:49:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-05-03 16:49:52,540 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) [2021-05-03 16:49:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-05-03 16:49:52,544 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-05-03 16:49:52,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:52,544 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-05-03 16:49:52,544 INFO L481 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) [2021-05-03 16:49:52,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-05-03 16:49:52,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:52,547 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:52,547 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:52,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:52,769 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:52,769 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-05-03 16:49:52,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:52,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282222592] [2021-05-03 16:49:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:52,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282222592] [2021-05-03 16:49:52,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645909410] [2021-05-03 16:49:52,815 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 [2021-05-03 16:49:52,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:49:52,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:52,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:52,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:52,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:52,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:52,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313680881] [2021-05-03 16:49:52,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:52,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:52,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:52,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:52,938 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) [2021-05-03 16:49:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:53,323 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-05-03 16:49:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:49:53,324 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 [2021-05-03 16:49:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:53,327 INFO L225 Difference]: With dead ends: 1821 [2021-05-03 16:49:53,327 INFO L226 Difference]: Without dead ends: 1821 [2021-05-03 16:49:53,328 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:49:53,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-05-03 16:49:53,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-05-03 16:49:53,360 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) [2021-05-03 16:49:53,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-05-03 16:49:53,364 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-05-03 16:49:53,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:53,365 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-05-03 16:49:53,365 INFO L481 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) [2021-05-03 16:49:53,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-05-03 16:49:53,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:53,368 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:53,368 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:53,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-03 16:49:53,593 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:53,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-05-03 16:49:53,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:53,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575924352] [2021-05-03 16:49:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:53,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575924352] [2021-05-03 16:49:53,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693906861] [2021-05-03 16:49:53,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:53,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:49:53,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:53,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:53,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:53,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:53,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:49:53,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642450336] [2021-05-03 16:49:53,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:49:53,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:53,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:49:53,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:49:53,765 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) [2021-05-03 16:49:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:54,119 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-05-03 16:49:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:49:54,132 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 [2021-05-03 16:49:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:54,136 INFO L225 Difference]: With dead ends: 1790 [2021-05-03 16:49:54,137 INFO L226 Difference]: Without dead ends: 1786 [2021-05-03 16:49:54,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:49:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-05-03 16:49:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-05-03 16:49:54,158 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) [2021-05-03 16:49:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-05-03 16:49:54,164 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-05-03 16:49:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:54,164 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-05-03 16:49:54,164 INFO L481 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) [2021-05-03 16:49:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-05-03 16:49:54,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:49:54,167 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:54,168 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:54,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-03 16:49:54,381 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:54,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:54,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-05-03 16:49:54,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:54,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70746735] [2021-05-03 16:49:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:54,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70746735] [2021-05-03 16:49:54,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102359702] [2021-05-03 16:49:54,428 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) [2021-05-03 16:49:54,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:49:54,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:54,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:49:54,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:54,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:54,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:49:54,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771470114] [2021-05-03 16:49:54,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:49:54,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:54,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:49:54,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:49:54,556 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) [2021-05-03 16:49:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:54,797 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-05-03 16:49:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:49:54,797 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 [2021-05-03 16:49:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:54,801 INFO L225 Difference]: With dead ends: 1649 [2021-05-03 16:49:54,801 INFO L226 Difference]: Without dead ends: 1637 [2021-05-03 16:49:54,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:49:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-05-03 16:49:54,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-05-03 16:49:54,819 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) [2021-05-03 16:49:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-05-03 16:49:54,822 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-05-03 16:49:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:54,822 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-05-03 16:49:54,822 INFO L481 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) [2021-05-03 16:49:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-05-03 16:49:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:54,824 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:54,824 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:49:55,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-03 16:49:55,025 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:55,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-05-03 16:49:55,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:55,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052175456] [2021-05-03 16:49:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:55,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052175456] [2021-05-03 16:49:55,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432076377] [2021-05-03 16:49:55,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:49:55,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:49:55,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:55,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:49:55,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:49:56,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:49:56,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:49:56,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:49:56,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:49:56,190 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:49:56,203 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:49:56,216 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:49:56,233 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:49:56,245 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:49:56,254 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:49:56,265 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:49:56,277 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:49:56,291 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:49:56,300 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:49:56,307 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,333 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 16:49:56,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:49:56,336 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:49:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:56,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:56,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:49:56,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508531617] [2021-05-03 16:49:56,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:49:56,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:56,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:49:56,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:49:56,376 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:57,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:57,384 INFO L93 Difference]: Finished difference Result 1531 states and 5001 transitions. [2021-05-03 16:49:57,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:49:57,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:57,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:57,388 INFO L225 Difference]: With dead ends: 1531 [2021-05-03 16:49:57,389 INFO L226 Difference]: Without dead ends: 1516 [2021-05-03 16:49:57,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1182.7ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:49:57,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-05-03 16:49:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-05-03 16:49:57,414 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) [2021-05-03 16:49:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-05-03 16:49:57,417 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-05-03 16:49:57,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:57,417 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-05-03 16:49:57,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-05-03 16:49:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:57,420 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:57,420 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:49:57,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-03 16:49:57,621 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:57,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:57,621 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-05-03 16:49:57,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:57,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778533363] [2021-05-03 16:49:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:57,865 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-05-03 16:49:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:58,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778533363] [2021-05-03 16:49:58,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380647773] [2021-05-03 16:49:58,148 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 [2021-05-03 16:49:58,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:49:58,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:58,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:49:58,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:58,754 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:49:58,850 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_3, v_prenex_5]} [2021-05-03 16:49:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:58,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:49:58,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:58,984 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:49:58,985 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-05-03 16:49:58,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:58,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:58,991 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 23 treesize of output 13 [2021-05-03 16:49:58,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:59,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:59,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:59,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:59,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:59,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:49:59,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:59,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:59,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:49:59,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:59,115 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-05-03 16:49:59,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:49:59,119 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-05-03 16:49:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:59,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:59,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:49:59,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674608639] [2021-05-03 16:49:59,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:49:59,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:59,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:49:59,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:49:59,164 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:00,169 INFO L93 Difference]: Finished difference Result 1548 states and 5036 transitions. [2021-05-03 16:50:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:50:00,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:00,172 INFO L225 Difference]: With dead ends: 1548 [2021-05-03 16:50:00,173 INFO L226 Difference]: Without dead ends: 1518 [2021-05-03 16:50:00,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1514.2ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:50:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-05-03 16:50:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1168. [2021-05-03 16:50:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.348757497857755) internal successors, (3908), 1167 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3908 transitions. [2021-05-03 16:50:00,195 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3908 transitions. Word has length 26 [2021-05-03 16:50:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:00,196 INFO L480 AbstractCegarLoop]: Abstraction has 1168 states and 3908 transitions. [2021-05-03 16:50:00,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3908 transitions. [2021-05-03 16:50:00,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:00,199 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:00,199 INFO L551 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] [2021-05-03 16:50:00,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:00,400 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:00,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-05-03 16:50:00,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:00,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028131093] [2021-05-03 16:50:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:00,839 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-03 16:50:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:01,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028131093] [2021-05-03 16:50:01,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571314025] [2021-05-03 16:50:01,035 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 [2021-05-03 16:50:01,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:50:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:01,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:50:01,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:02,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:02,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:50:02,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:50:02,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:50:02,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:50:02,106 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:50:02,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-05-03 16:50:02,139 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:50:02,159 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:50:02,175 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-05-03 16:50:02,197 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-05-03 16:50:02,212 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:50:02,234 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,251 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 30 treesize of output 16 [2021-05-03 16:50:02,253 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:50:02,267 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:02,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:02,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:50:02,277 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,306 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 16:50:02,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:50:02,308 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:50:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:02,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:02,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:50:02,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509951936] [2021-05-03 16:50:02,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:50:02,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:50:02,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:50:02,348 INFO L87 Difference]: Start difference. First operand 1168 states and 3908 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:03,554 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-05-03 16:50:03,924 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2021-05-03 16:50:04,059 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2021-05-03 16:50:04,429 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-05-03 16:50:04,623 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2021-05-03 16:50:05,007 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2021-05-03 16:50:05,277 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-05-03 16:50:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:05,364 INFO L93 Difference]: Finished difference Result 1668 states and 5372 transitions. [2021-05-03 16:50:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:50:05,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:05,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:05,368 INFO L225 Difference]: With dead ends: 1668 [2021-05-03 16:50:05,368 INFO L226 Difference]: Without dead ends: 1653 [2021-05-03 16:50:05,369 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 3185.2ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:50:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-05-03 16:50:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1198. [2021-05-03 16:50:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.3333333333333335) internal successors, (3990), 1197 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3990 transitions. [2021-05-03 16:50:05,390 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3990 transitions. Word has length 26 [2021-05-03 16:50:05,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:05,390 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 3990 transitions. [2021-05-03 16:50:05,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3990 transitions. [2021-05-03 16:50:05,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:05,393 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:05,393 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:50:05,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-03 16:50:05,602 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:05,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-05-03 16:50:05,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:05,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204825780] [2021-05-03 16:50:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:06,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204825780] [2021-05-03 16:50:06,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152589778] [2021-05-03 16:50:06,159 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 [2021-05-03 16:50:06,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:50:06,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:06,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:50:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:06,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:06,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 27 [2021-05-03 16:50:06,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,586 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:50:06,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:50:06,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,606 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:06,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-05-03 16:50:06,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,625 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:06,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:50:06,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:06,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:50:06,654 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:06,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:50:06,682 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,698 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:06,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 19 [2021-05-03 16:50:06,701 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,721 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:06,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:06,722 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,737 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:06,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-05-03 16:50:06,739 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,758 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:06,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:06,760 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,775 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:06,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:50:06,777 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,797 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:50:06,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-05-03 16:50:06,813 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,832 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:50:06,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:50:06,835 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,852 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:06,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:50:06,855 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,870 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:06,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:06,873 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:06,884 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:06,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:50:06,886 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:06,995 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-05-03 16:50:06,996 INFO L628 ElimStorePlain]: treesize reduction 38, result has 67.2 percent of original size [2021-05-03 16:50:06,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:50:06,999 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-05-03 16:50:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:07,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:07,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:50:07,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578460713] [2021-05-03 16:50:07,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:50:07,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:07,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:50:07,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:50:07,129 INFO L87 Difference]: Start difference. First operand 1198 states and 3990 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:07,826 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-05-03 16:50:08,145 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-03 16:50:08,314 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-03 16:50:08,873 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 16:50:09,052 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-05-03 16:50:09,313 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-05-03 16:50:09,711 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-05-03 16:50:09,900 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-05-03 16:50:10,494 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-05-03 16:50:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:10,977 INFO L93 Difference]: Finished difference Result 2109 states and 6599 transitions. [2021-05-03 16:50:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:50:10,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:10,982 INFO L225 Difference]: With dead ends: 2109 [2021-05-03 16:50:10,982 INFO L226 Difference]: Without dead ends: 2064 [2021-05-03 16:50:10,983 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 3490.9ms TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:50:10,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-05-03 16:50:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1216. [2021-05-03 16:50:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.3390946502057615) internal successors, (4057), 1215 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4057 transitions. [2021-05-03 16:50:11,011 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4057 transitions. Word has length 26 [2021-05-03 16:50:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:11,011 INFO L480 AbstractCegarLoop]: Abstraction has 1216 states and 4057 transitions. [2021-05-03 16:50:11,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4057 transitions. [2021-05-03 16:50:11,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:11,014 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:11,014 INFO L551 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] [2021-05-03 16:50:11,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:11,221 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:11,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:11,221 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-05-03 16:50:11,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:11,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354761365] [2021-05-03 16:50:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:11,666 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-05-03 16:50:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:11,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354761365] [2021-05-03 16:50:11,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561772194] [2021-05-03 16:50:11,785 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 [2021-05-03 16:50:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:11,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:50:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:12,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:12,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-05-03 16:50:12,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:50:12,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:50:12,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:50:12,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:50:12,810 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:50:12,830 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:50:12,847 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:50:12,863 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-05-03 16:50:12,881 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:50:12,897 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:50:12,912 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-05-03 16:50:12,930 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:12,945 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:12,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:12,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:50:12,954 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:12,982 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-05-03 16:50:12,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:50:12,985 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:50:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:13,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:13,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:50:13,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554379680] [2021-05-03 16:50:13,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:50:13,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:50:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:50:13,026 INFO L87 Difference]: Start difference. First operand 1216 states and 4057 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:13,788 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2021-05-03 16:50:13,913 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-05-03 16:50:14,355 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-05-03 16:50:14,537 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-05-03 16:50:14,716 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-05-03 16:50:14,884 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-05-03 16:50:15,091 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-05-03 16:50:15,303 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2021-05-03 16:50:15,497 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2021-05-03 16:50:15,911 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2021-05-03 16:50:16,406 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-05-03 16:50:16,607 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-03 16:50:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:16,731 INFO L93 Difference]: Finished difference Result 1905 states and 6066 transitions. [2021-05-03 16:50:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:50:16,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:16,737 INFO L225 Difference]: With dead ends: 1905 [2021-05-03 16:50:16,737 INFO L226 Difference]: Without dead ends: 1890 [2021-05-03 16:50:16,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3510.2ms TimeCoverageRelationStatistics Valid=433, Invalid=1919, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:50:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-05-03 16:50:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1227. [2021-05-03 16:50:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 3.3450244698205545) internal successors, (4101), 1226 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 4101 transitions. [2021-05-03 16:50:16,766 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 4101 transitions. Word has length 26 [2021-05-03 16:50:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:16,767 INFO L480 AbstractCegarLoop]: Abstraction has 1227 states and 4101 transitions. [2021-05-03 16:50:16,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 4101 transitions. [2021-05-03 16:50:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:16,770 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:16,771 INFO L551 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] [2021-05-03 16:50:16,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:16,971 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:16,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-05-03 16:50:16,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:16,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690804640] [2021-05-03 16:50:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:17,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690804640] [2021-05-03 16:50:17,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653108313] [2021-05-03 16:50:17,477 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 [2021-05-03 16:50:17,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:50:17,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:17,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:50:17,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:18,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:18,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-05-03 16:50:18,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,528 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 16:50:18,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 33 [2021-05-03 16:50:18,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,583 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 16:50:18,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-05-03 16:50:18,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,647 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 16:50:18,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-05-03 16:50:18,657 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,700 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-05-03 16:50:18,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:50:18,704 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,745 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-05-03 16:50:18,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-05-03 16:50:18,748 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,779 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:50:18,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-05-03 16:50:18,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,808 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:50:18,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-05-03 16:50:18,809 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,838 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:50:18,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-05-03 16:50:18,839 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,881 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-05-03 16:50:18,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-05-03 16:50:18,885 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,913 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:50:18,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-05-03 16:50:18,915 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,955 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-05-03 16:50:18,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 16:50:18,958 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,998 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-05-03 16:50:18,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-05-03 16:50:19,001 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:19,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:19,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:19,030 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:50:19,031 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 41 treesize of output 1 [2021-05-03 16:50:19,032 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:19,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:19,055 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:50:19,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:50:19,057 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:19,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:19,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:19,070 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:50:19,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-05-03 16:50:19,071 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:19,204 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 16:50:19,204 INFO L628 ElimStorePlain]: treesize reduction 119, result has 49.8 percent of original size [2021-05-03 16:50:19,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:50:19,207 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:133 [2021-05-03 16:50:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:19,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:19,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-05-03 16:50:19,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302483148] [2021-05-03 16:50:19,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:50:19,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:50:19,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:50:19,396 INFO L87 Difference]: Start difference. First operand 1227 states and 4101 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:20,328 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-05-03 16:50:21,113 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-05-03 16:50:21,252 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-05-03 16:50:21,674 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 44 [2021-05-03 16:50:21,832 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-05-03 16:50:22,210 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-05-03 16:50:22,688 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-05-03 16:50:22,826 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 16:50:22,971 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 16:50:23,264 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-05-03 16:50:23,613 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-05-03 16:50:23,791 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-05-03 16:50:24,011 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-05-03 16:50:24,229 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-05-03 16:50:24,397 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2021-05-03 16:50:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:24,530 INFO L93 Difference]: Finished difference Result 2510 states and 7726 transitions. [2021-05-03 16:50:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:50:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:24,535 INFO L225 Difference]: With dead ends: 2510 [2021-05-03 16:50:24,535 INFO L226 Difference]: Without dead ends: 2465 [2021-05-03 16:50:24,536 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 5027.8ms TimeCoverageRelationStatistics Valid=542, Invalid=3240, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 16:50:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-05-03 16:50:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1399. [2021-05-03 16:50:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.3125894134477827) internal successors, (4631), 1398 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:24,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4631 transitions. [2021-05-03 16:50:24,566 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4631 transitions. Word has length 26 [2021-05-03 16:50:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:24,566 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 4631 transitions. [2021-05-03 16:50:24,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4631 transitions. [2021-05-03 16:50:24,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:24,569 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:24,569 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:50:24,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-05-03 16:50:24,770 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-05-03 16:50:24,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:24,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205268000] [2021-05-03 16:50:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:25,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205268000] [2021-05-03 16:50:25,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433249647] [2021-05-03 16:50:25,221 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 [2021-05-03 16:50:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:50:25,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:25,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:25,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:25,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:50:25,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:50:25,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:25,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:50:25,943 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:25,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:50:25,957 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:25,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:25,971 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:25,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:50:25,984 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:25,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:25,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:50:25,999 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:26,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:26,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:50:26,013 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:26,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:26,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:26,025 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:26,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:26,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:50:26,040 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:26,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:26,051 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:26,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:26,068 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:26,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:26,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:50:26,081 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:26,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:26,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:26,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:26,088 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:26,117 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-05-03 16:50:26,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:50:26,120 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:50:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:26,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:26,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:50:26,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376645055] [2021-05-03 16:50:26,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:50:26,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:50:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:50:26,162 INFO L87 Difference]: Start difference. First operand 1399 states and 4631 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:26,411 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2021-05-03 16:50:26,952 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-05-03 16:50:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:27,578 INFO L93 Difference]: Finished difference Result 1804 states and 5851 transitions. [2021-05-03 16:50:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:50:27,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:27,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:27,582 INFO L225 Difference]: With dead ends: 1804 [2021-05-03 16:50:27,582 INFO L226 Difference]: Without dead ends: 1789 [2021-05-03 16:50:27,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1544.0ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:50:27,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-05-03 16:50:27,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1410. [2021-05-03 16:50:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.3101490418736694) internal successors, (4664), 1409 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4664 transitions. [2021-05-03 16:50:27,617 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4664 transitions. Word has length 26 [2021-05-03 16:50:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:27,617 INFO L480 AbstractCegarLoop]: Abstraction has 1410 states and 4664 transitions. [2021-05-03 16:50:27,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4664 transitions. [2021-05-03 16:50:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:27,621 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:27,621 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:50:27,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:27,821 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:27,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-05-03 16:50:27,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:27,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715435402] [2021-05-03 16:50:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:28,055 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-05-03 16:50:28,177 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-03 16:50:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:28,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715435402] [2021-05-03 16:50:28,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727122220] [2021-05-03 16:50:28,399 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 [2021-05-03 16:50:28,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:50:28,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:28,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:50:28,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:28,990 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:50:29,407 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_9, v_prenex_21, v_prenex_13, v_prenex_23, v_prenex_11, v_prenex_17, v_prenex_28, v_prenex_15, v_prenex_26], 3=[v_prenex_19, v_prenex_7]} [2021-05-03 16:50:29,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:29,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-05-03 16:50:29,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:29,977 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 155 [2021-05-03 16:50:29,978 INFO L628 ElimStorePlain]: treesize reduction 117, result has 78.3 percent of original size [2021-05-03 16:50:30,018 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:50:30,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:50:30,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:30,235 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-05-03 16:50:30,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:30,271 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:30,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:50:30,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:30,500 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-03 16:50:30,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:30,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:30,527 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:50:30,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:30,761 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-03 16:50:30,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:30,762 INFO L518 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2021-05-03 16:50:30,762 INFO L518 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2021-05-03 16:50:30,807 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:50:30,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:50:30,810 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:31,035 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-05-03 16:50:31,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:31,068 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:50:31,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:50:31,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:31,299 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-05-03 16:50:31,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:31,338 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:31,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:50:31,350 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:31,564 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-03 16:50:31,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:31,604 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:31,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:50:31,612 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:31,807 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-03 16:50:31,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:31,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:31,843 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-05-03 16:50:31,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-05-03 16:50:31,848 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:32,046 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-03 16:50:32,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:32,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:32,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:32,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-05-03 16:50:32,084 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:32,260 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-03 16:50:32,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:32,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:50:32,300 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:545, output treesize:487 [2021-05-03 16:50:32,572 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-05-03 16:50:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:32,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:32,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:50:32,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537870671] [2021-05-03 16:50:32,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:50:32,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:50:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:50:32,778 INFO L87 Difference]: Start difference. First operand 1410 states and 4664 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:33,103 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 26 [2021-05-03 16:50:33,646 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-03 16:50:33,806 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2021-05-03 16:50:33,964 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2021-05-03 16:50:34,162 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-05-03 16:50:34,474 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-05-03 16:50:34,693 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2021-05-03 16:50:34,849 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:50:35,135 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2021-05-03 16:50:35,280 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-05-03 16:50:35,614 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-05-03 16:50:35,869 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:50:36,129 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-05-03 16:50:36,769 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-05-03 16:50:37,673 WARN L205 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 83 [2021-05-03 16:50:38,067 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-05-03 16:50:38,482 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-05-03 16:50:39,389 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 82 [2021-05-03 16:50:39,880 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-05-03 16:50:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:39,995 INFO L93 Difference]: Finished difference Result 2170 states and 6841 transitions. [2021-05-03 16:50:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:50:39,995 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:39,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:40,001 INFO L225 Difference]: With dead ends: 2170 [2021-05-03 16:50:40,001 INFO L226 Difference]: Without dead ends: 2155 [2021-05-03 16:50:40,002 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 7395.9ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:50:40,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-05-03 16:50:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1429. [2021-05-03 16:50:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.3144257703081235) internal successors, (4733), 1428 states have internal predecessors, (4733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4733 transitions. [2021-05-03 16:50:40,034 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4733 transitions. Word has length 26 [2021-05-03 16:50:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:40,035 INFO L480 AbstractCegarLoop]: Abstraction has 1429 states and 4733 transitions. [2021-05-03 16:50:40,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:40,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4733 transitions. [2021-05-03 16:50:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:40,039 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:40,039 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:50:40,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-05-03 16:50:40,239 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:40,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-05-03 16:50:40,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:40,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717157439] [2021-05-03 16:50:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:40,544 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 16:50:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:40,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717157439] [2021-05-03 16:50:40,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167058977] [2021-05-03 16:50:40,742 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 [2021-05-03 16:50:40,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:50:40,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:40,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:50:40,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:41,046 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:50:41,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:41,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:41,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:50:41,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:41,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:41,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:41,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:50:41,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:41,848 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-05-03 16:50:41,849 INFO L628 ElimStorePlain]: treesize reduction 125, result has 41.3 percent of original size [2021-05-03 16:50:41,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:41,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:50:41,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:41,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:41,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_36 vanished before elimination [2021-05-03 16:50:41,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:41,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:41,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:50:41,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:41,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:41,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:50:41,970 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:24 [2021-05-03 16:50:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:42,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:42,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:50:42,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609235935] [2021-05-03 16:50:42,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:50:42,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:42,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:50:42,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:50:42,022 INFO L87 Difference]: Start difference. First operand 1429 states and 4733 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:42,996 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-05-03 16:50:43,406 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-05-03 16:50:43,693 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-05-03 16:50:44,257 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-05-03 16:50:44,544 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 16:50:45,012 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-05-03 16:50:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:45,195 INFO L93 Difference]: Finished difference Result 2255 states and 7195 transitions. [2021-05-03 16:50:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:50:45,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:45,201 INFO L225 Difference]: With dead ends: 2255 [2021-05-03 16:50:45,201 INFO L226 Difference]: Without dead ends: 2225 [2021-05-03 16:50:45,202 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 3380.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:50:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-05-03 16:50:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1459. [2021-05-03 16:50:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.324417009602195) internal successors, (4847), 1458 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:45,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4847 transitions. [2021-05-03 16:50:45,262 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4847 transitions. Word has length 26 [2021-05-03 16:50:45,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:45,262 INFO L480 AbstractCegarLoop]: Abstraction has 1459 states and 4847 transitions. [2021-05-03 16:50:45,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:45,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4847 transitions. [2021-05-03 16:50:45,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:45,265 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:45,266 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:50:45,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:45,466 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:45,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:45,467 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-05-03 16:50:45,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:45,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157843488] [2021-05-03 16:50:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:45,667 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-05-03 16:50:45,785 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-05-03 16:50:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:45,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157843488] [2021-05-03 16:50:45,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365637847] [2021-05-03 16:50:45,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:50:45,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:50:45,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:45,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:50:45,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:46,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:50:46,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:50:46,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:50:46,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:50:46,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,690 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 28 treesize of output 16 [2021-05-03 16:50:46,691 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:50:46,702 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:46,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:50:46,733 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:46,748 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:50:46,762 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:46,776 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:50:46,790 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:50:46,802 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:46,811 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:46,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:46,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:46,818 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:46,845 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-05-03 16:50:46,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:50:46,848 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:50:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:46,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:46,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 16:50:46,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425969817] [2021-05-03 16:50:46,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:50:46,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:50:46,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:50:46,890 INFO L87 Difference]: Start difference. First operand 1459 states and 4847 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:47,644 INFO L93 Difference]: Finished difference Result 1832 states and 5996 transitions. [2021-05-03 16:50:47,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:50:47,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:47,651 INFO L225 Difference]: With dead ends: 1832 [2021-05-03 16:50:47,652 INFO L226 Difference]: Without dead ends: 1817 [2021-05-03 16:50:47,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1140.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:50:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-05-03 16:50:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1468. [2021-05-03 16:50:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3285616905248805) internal successors, (4883), 1467 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4883 transitions. [2021-05-03 16:50:47,688 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4883 transitions. Word has length 26 [2021-05-03 16:50:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:47,688 INFO L480 AbstractCegarLoop]: Abstraction has 1468 states and 4883 transitions. [2021-05-03 16:50:47,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4883 transitions. [2021-05-03 16:50:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:47,691 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:47,692 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:50:47,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-05-03 16:50:47,892 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:47,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:47,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-05-03 16:50:47,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:47,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70590124] [2021-05-03 16:50:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:48,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70590124] [2021-05-03 16:50:48,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393251272] [2021-05-03 16:50:48,340 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 [2021-05-03 16:50:48,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:50:48,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:48,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:50:48,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:49,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:49,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:49,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:50:49,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:49,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:49,135 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:49,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:50:49,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:49,364 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:50:49,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:49,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:49,399 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:50:49,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:50:49,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:49,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:49,435 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:49,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:50:49,438 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:49,657 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 16:50:49,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:49,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:49,693 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:49,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:50:49,703 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:49,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:49,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:49,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:50:49,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:49,907 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 16:50:49,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:49,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:49,942 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:49,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:50:49,944 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:49,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:49,969 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:50:49,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:50:49,971 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:50,131 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 16:50:50,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:50,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:50:50,176 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:221 [2021-05-03 16:50:50,345 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-05-03 16:50:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:50,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:50,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:50:50,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109300656] [2021-05-03 16:50:50,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:50:50,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:50,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:50:50,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:50:50,400 INFO L87 Difference]: Start difference. First operand 1468 states and 4883 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:50,894 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-05-03 16:50:51,162 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 27 [2021-05-03 16:50:51,633 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2021-05-03 16:50:52,062 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 16:50:52,347 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-05-03 16:50:52,665 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-05-03 16:50:53,310 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2021-05-03 16:50:53,595 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 16:50:53,977 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-05-03 16:50:54,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:54,242 INFO L93 Difference]: Finished difference Result 2776 states and 8807 transitions. [2021-05-03 16:50:54,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:50:54,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:54,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:54,250 INFO L225 Difference]: With dead ends: 2776 [2021-05-03 16:50:54,250 INFO L226 Difference]: Without dead ends: 2746 [2021-05-03 16:50:54,251 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3972.9ms TimeCoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:50:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-05-03 16:50:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1460. [2021-05-03 16:50:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.3262508567511992) internal successors, (4853), 1459 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4853 transitions. [2021-05-03 16:50:54,293 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4853 transitions. Word has length 26 [2021-05-03 16:50:54,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:54,294 INFO L480 AbstractCegarLoop]: Abstraction has 1460 states and 4853 transitions. [2021-05-03 16:50:54,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:54,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4853 transitions. [2021-05-03 16:50:54,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:54,297 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:54,298 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:50:54,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:54,498 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:54,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 12 times [2021-05-03 16:50:54,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:54,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608688970] [2021-05-03 16:50:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:54,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:54,738 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-05-03 16:50:54,933 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-05-03 16:50:55,069 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-03 16:50:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:55,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608688970] [2021-05-03 16:50:55,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495826683] [2021-05-03 16:50:55,184 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 [2021-05-03 16:50:55,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:50:55,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:55,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:50:55,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:55,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:55,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-05-03 16:50:55,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,570 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:50:55,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-05-03 16:50:55,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:55,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:50:55,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,613 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:55,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:55,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,627 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:55,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:50:55,629 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,646 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:50:55,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:50:55,648 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,669 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:55,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-05-03 16:50:55,671 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,693 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:55,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:50:55,696 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,719 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:55,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-05-03 16:50:55,720 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,741 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:55,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:50:55,744 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,769 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:55,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-05-03 16:50:55,771 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,791 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:55,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:55,792 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:55,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-05-03 16:50:55,831 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,850 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:55,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:50:55,852 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,869 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:55,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-05-03 16:50:55,871 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:55,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:55,886 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:50:55,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:55,887 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:55,991 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-05-03 16:50:55,992 INFO L628 ElimStorePlain]: treesize reduction 57, result has 57.5 percent of original size [2021-05-03 16:50:55,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:50:55,994 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:77 [2021-05-03 16:50:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:56,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:56,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:50:56,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628799937] [2021-05-03 16:50:56,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:50:56,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:56,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:50:56,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:50:56,144 INFO L87 Difference]: Start difference. First operand 1460 states and 4853 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:56,912 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-05-03 16:50:57,083 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-05-03 16:50:57,527 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-03 16:50:57,729 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-05-03 16:50:58,071 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-05-03 16:50:58,389 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-05-03 16:50:58,616 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-05-03 16:50:58,754 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 16:50:58,914 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 16:50:59,280 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-05-03 16:50:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:59,765 INFO L93 Difference]: Finished difference Result 2128 states and 6867 transitions. [2021-05-03 16:50:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:50:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:59,770 INFO L225 Difference]: With dead ends: 2128 [2021-05-03 16:50:59,770 INFO L226 Difference]: Without dead ends: 2098 [2021-05-03 16:50:59,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 3619.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:50:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-05-03 16:50:59,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1469. [2021-05-03 16:50:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 3.332425068119891) internal successors, (4892), 1468 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 4892 transitions. [2021-05-03 16:50:59,799 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 4892 transitions. Word has length 26 [2021-05-03 16:50:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:59,799 INFO L480 AbstractCegarLoop]: Abstraction has 1469 states and 4892 transitions. [2021-05-03 16:50:59,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 4892 transitions. [2021-05-03 16:50:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:59,802 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:59,802 INFO L551 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] [2021-05-03 16:51:00,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:00,003 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:00,003 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-05-03 16:51:00,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:00,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884986203] [2021-05-03 16:51:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:00,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884986203] [2021-05-03 16:51:00,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593451989] [2021-05-03 16:51:00,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:51:00,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:51:00,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:00,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:51:00,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:01,032 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:51:01,405 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-05-03 16:51:01,895 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 83 [2021-05-03 16:51:02,165 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_68], 6=[v_prenex_64, v_prenex_66]} [2021-05-03 16:51:02,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:02,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:02,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:02,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:02,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:51:02,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:02,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:02,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:02,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:02,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:51:02,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:02,352 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-05-03 16:51:02,353 INFO L628 ElimStorePlain]: treesize reduction 146, result has 42.7 percent of original size [2021-05-03 16:51:02,353 INFO L518 ElimStorePlain]: Eliminatee v_prenex_68 vanished before elimination [2021-05-03 16:51:02,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:02,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:02,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:02,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:51:02,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:02,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:02,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:02,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:02,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:51:02,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:02,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:02,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:51:02,479 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:314, output treesize:24 [2021-05-03 16:51:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:02,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:02,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:51:02,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096989872] [2021-05-03 16:51:02,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:51:02,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:02,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:51:02,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:51:02,541 INFO L87 Difference]: Start difference. First operand 1469 states and 4892 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:03,379 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-05-03 16:51:04,176 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-05-03 16:51:04,692 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-05-03 16:51:04,847 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 16:51:05,374 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-05-03 16:51:05,952 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-05-03 16:51:06,400 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2021-05-03 16:51:06,611 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-05-03 16:51:06,767 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-05-03 16:51:07,415 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-05-03 16:51:07,679 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:51:08,855 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 79 [2021-05-03 16:51:09,110 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:51:09,395 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-03 16:51:10,510 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 122 [2021-05-03 16:51:11,104 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 90 [2021-05-03 16:51:12,058 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 85 [2021-05-03 16:51:12,733 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 74 [2021-05-03 16:51:13,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:13,227 INFO L93 Difference]: Finished difference Result 3830 states and 11792 transitions. [2021-05-03 16:51:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 16:51:13,232 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:51:13,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:13,241 INFO L225 Difference]: With dead ends: 3830 [2021-05-03 16:51:13,242 INFO L226 Difference]: Without dead ends: 3680 [2021-05-03 16:51:13,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 9729.2ms TimeCoverageRelationStatistics Valid=761, Invalid=3661, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 16:51:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-05-03 16:51:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 1538. [2021-05-03 16:51:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.3376707872478857) internal successors, (5130), 1537 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5130 transitions. [2021-05-03 16:51:13,288 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5130 transitions. Word has length 26 [2021-05-03 16:51:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:13,288 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 5130 transitions. [2021-05-03 16:51:13,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5130 transitions. [2021-05-03 16:51:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:51:13,292 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:13,292 INFO L551 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] [2021-05-03 16:51:13,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-05-03 16:51:13,493 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:13,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-05-03 16:51:13,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:13,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418558155] [2021-05-03 16:51:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:13,919 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-05-03 16:51:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:14,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418558155] [2021-05-03 16:51:14,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74352626] [2021-05-03 16:51:14,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:14,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:51:14,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:14,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:51:14,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:15,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:51:15,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-05-03 16:51:15,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:51:15,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:51:15,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:51:15,239 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:51:15,255 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:51:15,270 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:51:15,285 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:51:15,301 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-05-03 16:51:15,318 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:51:15,335 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:51:15,352 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-05-03 16:51:15,366 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:51:15,382 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:15,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:15,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:51:15,391 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:15,421 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-05-03 16:51:15,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:51:15,423 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:51:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:15,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:15,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:51:15,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110323658] [2021-05-03 16:51:15,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:51:15,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:15,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:51:15,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:51:15,471 INFO L87 Difference]: Start difference. First operand 1538 states and 5130 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:16,184 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-05-03 16:51:16,316 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-05-03 16:51:16,886 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-05-03 16:51:17,062 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-03 16:51:17,284 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 16:51:17,763 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-05-03 16:51:18,204 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-05-03 16:51:18,771 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-05-03 16:51:19,232 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 16:51:19,888 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-05-03 16:51:20,118 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-05-03 16:51:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:20,469 INFO L93 Difference]: Finished difference Result 3160 states and 10007 transitions. [2021-05-03 16:51:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:51:20,470 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:51:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:20,477 INFO L225 Difference]: With dead ends: 3160 [2021-05-03 16:51:20,477 INFO L226 Difference]: Without dead ends: 3073 [2021-05-03 16:51:20,478 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4799.8ms TimeCoverageRelationStatistics Valid=602, Invalid=2704, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:51:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2021-05-03 16:51:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 1556. [2021-05-03 16:51:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.34983922829582) internal successors, (5209), 1555 states have internal predecessors, (5209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5209 transitions. [2021-05-03 16:51:20,521 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5209 transitions. Word has length 26 [2021-05-03 16:51:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:20,521 INFO L480 AbstractCegarLoop]: Abstraction has 1556 states and 5209 transitions. [2021-05-03 16:51:20,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:20,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5209 transitions. [2021-05-03 16:51:20,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:51:20,525 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:20,525 INFO L551 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] [2021-05-03 16:51:20,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:20,726 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:20,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:20,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-05-03 16:51:20,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:20,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321677005] [2021-05-03 16:51:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:21,126 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-05-03 16:51:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:21,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321677005] [2021-05-03 16:51:21,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643059228] [2021-05-03 16:51:21,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:21,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:51:21,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:21,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:51:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:22,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,287 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-05-03 16:51:22,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-05-03 16:51:22,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,362 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:51:22,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:51:22,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,409 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:51:22,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-05-03 16:51:22,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,469 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-05-03 16:51:22,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-05-03 16:51:22,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,534 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-05-03 16:51:22,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-05-03 16:51:22,537 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,597 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:51:22,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-05-03 16:51:22,607 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,647 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:51:22,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-05-03 16:51:22,649 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:22,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-05-03 16:51:22,720 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,762 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:51:22,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-05-03 16:51:22,763 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,800 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:51:22,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-05-03 16:51:22,802 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,833 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:51:22,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-05-03 16:51:22,835 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,862 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:51:22,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:51:22,863 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,903 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-05-03 16:51:22,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-05-03 16:51:22,906 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,935 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:51:22,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:51:22,937 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,966 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:51:22,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-05-03 16:51:22,968 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:22,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:22,987 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:51:22,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:51:22,988 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:23,142 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-05-03 16:51:23,143 INFO L628 ElimStorePlain]: treesize reduction 59, result has 61.2 percent of original size [2021-05-03 16:51:23,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:51:23,152 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-05-03 16:51:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:23,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:23,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:51:23,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97846298] [2021-05-03 16:51:23,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:51:23,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:23,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:51:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:51:23,284 INFO L87 Difference]: Start difference. First operand 1556 states and 5209 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:23,793 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2021-05-03 16:51:24,081 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-05-03 16:51:24,706 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-05-03 16:51:25,004 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-05-03 16:51:25,442 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-05-03 16:51:25,761 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-05-03 16:51:26,057 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-05-03 16:51:26,568 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-05-03 16:51:26,753 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-05-03 16:51:27,184 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-05-03 16:51:27,415 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-05-03 16:51:28,235 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-05-03 16:51:28,621 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-05-03 16:51:28,795 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-05-03 16:51:29,181 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-05-03 16:51:29,542 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-05-03 16:51:29,744 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 16:51:29,991 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:51:30,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:30,374 INFO L93 Difference]: Finished difference Result 3491 states and 10885 transitions. [2021-05-03 16:51:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 16:51:30,376 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:51:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:30,384 INFO L225 Difference]: With dead ends: 3491 [2021-05-03 16:51:30,384 INFO L226 Difference]: Without dead ends: 3403 [2021-05-03 16:51:30,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 6209.9ms TimeCoverageRelationStatistics Valid=805, Invalid=3355, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 16:51:30,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2021-05-03 16:51:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 1566. [2021-05-03 16:51:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3552715654952077) internal successors, (5251), 1565 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5251 transitions. [2021-05-03 16:51:30,430 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5251 transitions. Word has length 26 [2021-05-03 16:51:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:30,430 INFO L480 AbstractCegarLoop]: Abstraction has 1566 states and 5251 transitions. [2021-05-03 16:51:30,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5251 transitions. [2021-05-03 16:51:30,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:51:30,434 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:30,434 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:51:30,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable830 [2021-05-03 16:51:30,634 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-05-03 16:51:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:30,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145513325] [2021-05-03 16:51:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:30,866 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-03 16:51:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:31,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145513325] [2021-05-03 16:51:31,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208250646] [2021-05-03 16:51:31,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:31,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:51:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:31,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:31,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:51:31,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:31,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:31,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:51:31,919 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:31,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:31,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:51:31,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:31,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:31,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:51:31,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:31,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:31,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:51:31,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:31,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:31,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:51:31,981 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:31,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:31,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:31,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:51:31,995 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:32,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:32,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:51:32,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:32,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:32,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:51:32,019 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:32,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:32,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:51:32,031 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:32,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:32,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:51:32,041 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:32,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:32,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:51:32,052 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:32,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:32,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:51:32,062 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:32,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:32,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:51:32,072 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:32,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:32,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:32,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:51:32,079 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:32,113 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 16:51:32,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:51:32,115 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:51:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:32,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:32,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:51:32,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138697964] [2021-05-03 16:51:32,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:51:32,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:32,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:51:32,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:51:32,154 INFO L87 Difference]: Start difference. First operand 1566 states and 5251 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:33,374 INFO L93 Difference]: Finished difference Result 1955 states and 6431 transitions. [2021-05-03 16:51:33,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:51:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:51:33,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:33,379 INFO L225 Difference]: With dead ends: 1955 [2021-05-03 16:51:33,380 INFO L226 Difference]: Without dead ends: 1940 [2021-05-03 16:51:33,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1585.5ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:51:33,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-05-03 16:51:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1574. [2021-05-03 16:51:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 3.3515575333757153) internal successors, (5272), 1573 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5272 transitions. [2021-05-03 16:51:33,426 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5272 transitions. Word has length 26 [2021-05-03 16:51:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:33,426 INFO L480 AbstractCegarLoop]: Abstraction has 1574 states and 5272 transitions. [2021-05-03 16:51:33,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5272 transitions. [2021-05-03 16:51:33,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:51:33,431 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:33,431 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:51:33,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable935 [2021-05-03 16:51:33,645 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:33,645 INFO L82 PathProgramCache]: Analyzing trace with hash -426889313, now seen corresponding path program 14 times [2021-05-03 16:51:33,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:33,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168117375] [2021-05-03 16:51:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:33,948 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-05-03 16:51:34,121 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-05-03 16:51:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:34,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168117375] [2021-05-03 16:51:34,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116580140] [2021-05-03 16:51:34,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:51:34,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:51:34,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:34,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:51:34,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:35,103 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:51:35,674 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:51:35,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:51:35,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:36,313 WARN L205 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 149 [2021-05-03 16:51:36,314 INFO L628 ElimStorePlain]: treesize reduction 177, result has 69.8 percent of original size [2021-05-03 16:51:36,314 INFO L518 ElimStorePlain]: Eliminatee v_prenex_94 vanished before elimination [2021-05-03 16:51:36,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:36,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:51:36,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:36,667 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-05-03 16:51:36,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:36,711 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:51:36,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:51:36,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:37,021 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-03 16:51:37,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:37,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:37,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:51:37,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:37,391 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-05-03 16:51:37,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:37,449 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:51:37,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:51:37,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:37,789 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-05-03 16:51:37,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:37,832 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:51:37,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:51:37,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:38,133 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-03 16:51:38,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:38,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:38,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:51:38,180 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:38,476 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-05-03 16:51:38,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:38,520 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:51:38,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:51:38,523 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:38,732 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-03 16:51:38,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:38,761 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:51:38,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:51:38,763 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:38,981 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-03 16:51:38,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:39,019 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:51:39,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:51:39,027 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:39,289 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-03 16:51:39,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:39,346 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:51:39,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:51:39,355 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:39,594 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-03 16:51:39,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:39,595 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-05-03 16:51:39,595 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-05-03 16:51:39,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 14 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:51:39,622 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 28 variables, input treesize:631, output treesize:486 [2021-05-03 16:51:39,936 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-05-03 16:51:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:40,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:40,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:51:40,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026697728] [2021-05-03 16:51:40,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:51:40,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:40,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:51:40,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:51:40,133 INFO L87 Difference]: Start difference. First operand 1574 states and 5272 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:40,467 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 19 [2021-05-03 16:51:40,815 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-05-03 16:51:41,506 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-05-03 16:51:41,860 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-05-03 16:51:42,163 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:51:42,486 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-05-03 16:51:42,884 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-05-03 16:51:43,178 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:51:43,938 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-05-03 16:51:44,892 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-05-03 16:51:46,349 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2021-05-03 16:51:46,681 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-05-03 16:51:46,978 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-05-03 16:51:47,213 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2021-05-03 16:51:47,726 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-05-03 16:51:47,910 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 23 [2021-05-03 16:51:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:48,035 INFO L93 Difference]: Finished difference Result 2340 states and 7472 transitions. [2021-05-03 16:51:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:51:48,037 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:51:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:48,043 INFO L225 Difference]: With dead ends: 2340 [2021-05-03 16:51:48,044 INFO L226 Difference]: Without dead ends: 2310 [2021-05-03 16:51:48,044 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 8128.5ms TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:51:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-05-03 16:51:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1562. [2021-05-03 16:51:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.351057014734145) internal successors, (5231), 1561 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5231 transitions. [2021-05-03 16:51:48,085 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5231 transitions. Word has length 26 [2021-05-03 16:51:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:48,085 INFO L480 AbstractCegarLoop]: Abstraction has 1562 states and 5231 transitions. [2021-05-03 16:51:48,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5231 transitions. [2021-05-03 16:51:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:51:48,089 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:48,089 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:51:48,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:48,293 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 15 times [2021-05-03 16:51:48,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:48,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140264474] [2021-05-03 16:51:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:48,592 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-03 16:51:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:48,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140264474] [2021-05-03 16:51:48,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872908925] [2021-05-03 16:51:48,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:48,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:51:48,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:51:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:49,760 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:51:50,168 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-03 16:51:50,650 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-05-03 16:51:50,734 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_104], 2=[A, v_prenex_103]} [2021-05-03 16:51:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:50,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:51:50,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:50,954 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:51:50,955 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-05-03 16:51:50,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:50,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:50,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:51:50,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:51,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:51:51,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:51,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:51:51,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:51,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:51:51,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:51:51,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:51:51,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:51:51,155 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-05-03 16:51:51,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:51:51,160 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-05-03 16:51:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:51,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:51,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-05-03 16:51:51,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221125499] [2021-05-03 16:51:51,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:51:51,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:51,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:51:51,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:51:51,248 INFO L87 Difference]: Start difference. First operand 1562 states and 5231 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:52,272 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-05-03 16:51:53,007 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-05-03 16:51:53,373 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-05-03 16:51:54,024 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-03 16:51:54,804 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-05-03 16:51:55,617 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-05-03 16:51:56,374 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 51 [2021-05-03 16:51:57,573 WARN L205 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 63 [2021-05-03 16:51:58,084 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 51 [2021-05-03 16:51:58,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:58,504 INFO L93 Difference]: Finished difference Result 2452 states and 7792 transitions. [2021-05-03 16:51:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:51:58,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:51:58,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:58,510 INFO L225 Difference]: With dead ends: 2452 [2021-05-03 16:51:58,510 INFO L226 Difference]: Without dead ends: 2407 [2021-05-03 16:51:58,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 7369.9ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 16:51:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-05-03 16:51:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1571. [2021-05-03 16:51:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.3528662420382167) internal successors, (5264), 1570 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5264 transitions. [2021-05-03 16:51:58,545 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5264 transitions. Word has length 26 [2021-05-03 16:51:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:58,545 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 5264 transitions. [2021-05-03 16:51:58,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:58,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5264 transitions. [2021-05-03 16:51:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:51:58,549 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:58,549 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:51:58,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1016 [2021-05-03 16:51:58,750 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:58,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:58,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2108946275, now seen corresponding path program 16 times [2021-05-03 16:51:58,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:58,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312169773] [2021-05-03 16:51:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:59,014 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-03 16:51:59,156 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-05-03 16:51:59,282 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 16:51:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:59,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312169773] [2021-05-03 16:51:59,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810043295] [2021-05-03 16:51:59,369 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 [2021-05-03 16:51:59,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:51:59,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:59,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:51:59,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:59,999 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:52:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:00,300 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:52:00,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:52:00,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:00,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:00,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:00,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-05-03 16:52:00,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:01,052 WARN L205 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-05-03 16:52:01,053 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-05-03 16:52:01,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:01,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:01,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:52:01,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:01,409 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-03 16:52:01,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:01,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:01,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:52:01,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:01,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:01,473 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:52:01,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:52:01,476 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:01,982 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 107 [2021-05-03 16:52:01,983 INFO L628 ElimStorePlain]: treesize reduction 20, result has 93.7 percent of original size [2021-05-03 16:52:01,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:02,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:02,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:52:02,017 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:02,251 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-03 16:52:02,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:02,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:02,278 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:02,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:52:02,281 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:02,539 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-03 16:52:02,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:02,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:02,571 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:02,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:52:02,575 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:02,778 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 16:52:02,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:02,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:02,813 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:02,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:52:02,815 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:02,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:02,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:02,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:52:02,840 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:03,188 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-05-03 16:52:03,189 INFO L628 ElimStorePlain]: treesize reduction 24, result has 89.1 percent of original size [2021-05-03 16:52:03,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:03,209 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:03,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:52:03,213 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:03,366 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 16:52:03,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:03,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:52:03,377 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:152 [2021-05-03 16:52:03,719 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 16:52:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:03,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:52:03,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:52:03,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137051358] [2021-05-03 16:52:03,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:52:03,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:52:03,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:52:03,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:52:03,819 INFO L87 Difference]: Start difference. First operand 1571 states and 5264 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:04,013 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-05-03 16:52:04,213 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 26 [2021-05-03 16:52:04,493 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-05-03 16:52:04,661 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-05-03 16:52:05,341 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2021-05-03 16:52:05,975 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-05-03 16:52:06,296 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-05-03 16:52:06,478 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-03 16:52:07,007 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:52:07,407 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:52:08,289 WARN L205 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-05-03 16:52:08,615 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 16:52:09,160 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-05-03 16:52:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:52:09,395 INFO L93 Difference]: Finished difference Result 2684 states and 8631 transitions. [2021-05-03 16:52:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:52:09,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:52:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:52:09,402 INFO L225 Difference]: With dead ends: 2684 [2021-05-03 16:52:09,402 INFO L226 Difference]: Without dead ends: 2654 [2021-05-03 16:52:09,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 5510.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:52:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-05-03 16:52:09,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 1591. [2021-05-03 16:52:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3660377358490567) internal successors, (5352), 1590 states have internal predecessors, (5352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5352 transitions. [2021-05-03 16:52:09,457 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5352 transitions. Word has length 26 [2021-05-03 16:52:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:52:09,458 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5352 transitions. [2021-05-03 16:52:09,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5352 transitions. [2021-05-03 16:52:09,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:52:09,462 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:52:09,462 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:52:09,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:52:09,685 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:52:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:52:09,685 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 17 times [2021-05-03 16:52:09,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:52:09,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650154803] [2021-05-03 16:52:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:52:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:10,210 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-05-03 16:52:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:10,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650154803] [2021-05-03 16:52:10,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350366074] [2021-05-03 16:52:10,523 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 [2021-05-03 16:52:10,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:52:10,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:52:10,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:52:10,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:52:10,999 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:52:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:52:11,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:52:11,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:52:11,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:52:11,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:52:11,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:52:11,817 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:52:11,836 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:52:11,854 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:52:11,871 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:52:11,887 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:52:11,905 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:52:11,923 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:52:11,938 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:52:11,967 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:11,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:11,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:11,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:52:11,981 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:12,029 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-05-03 16:52:12,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:52:12,031 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:52:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:12,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:52:12,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:52:12,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350053579] [2021-05-03 16:52:12,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:52:12,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:52:12,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:52:12,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:52:12,100 INFO L87 Difference]: Start difference. First operand 1591 states and 5352 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:12,519 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-05-03 16:52:12,881 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-05-03 16:52:13,146 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-05-03 16:52:13,457 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 16:52:14,039 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 16:52:14,289 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:52:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:52:14,710 INFO L93 Difference]: Finished difference Result 2041 states and 6702 transitions. [2021-05-03 16:52:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:52:14,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:52:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:52:14,718 INFO L225 Difference]: With dead ends: 2041 [2021-05-03 16:52:14,718 INFO L226 Difference]: Without dead ends: 2020 [2021-05-03 16:52:14,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2940.2ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:52:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2021-05-03 16:52:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1632. [2021-05-03 16:52:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.3623543838136114) internal successors, (5484), 1631 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5484 transitions. [2021-05-03 16:52:14,761 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5484 transitions. Word has length 26 [2021-05-03 16:52:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:52:14,762 INFO L480 AbstractCegarLoop]: Abstraction has 1632 states and 5484 transitions. [2021-05-03 16:52:14,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5484 transitions. [2021-05-03 16:52:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:52:14,766 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:52:14,766 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:52:14,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1053 [2021-05-03 16:52:14,991 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:52:14,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:52:14,992 INFO L82 PathProgramCache]: Analyzing trace with hash 658414247, now seen corresponding path program 18 times [2021-05-03 16:52:14,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:52:14,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134044710] [2021-05-03 16:52:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:52:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:15,278 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 16:52:15,470 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 16:52:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:15,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134044710] [2021-05-03 16:52:15,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672979304] [2021-05-03 16:52:15,627 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) [2021-05-03 16:52:15,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:52:15,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:52:15,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:52:15,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:52:16,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:16,593 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:52:16,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:52:16,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:16,637 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:52:16,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:52:16,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:16,916 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-03 16:52:16,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:16,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:16,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:16,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:52:16,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:16,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:17,004 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:52:17,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:52:17,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:17,310 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 16:52:17,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:17,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:17,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:17,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:52:17,367 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:17,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:17,411 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:52:17,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:52:17,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:17,659 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 16:52:17,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:17,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:17,701 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:52:17,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:52:17,704 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:17,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:17,736 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:52:17,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:52:17,740 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:17,952 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:52:17,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:17,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:52:17,984 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:329, output treesize:227 [2021-05-03 16:52:18,229 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-05-03 16:52:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:18,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:52:18,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 16:52:18,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269435898] [2021-05-03 16:52:18,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:52:18,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:52:18,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:52:18,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:52:18,300 INFO L87 Difference]: Start difference. First operand 1632 states and 5484 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:18,501 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2021-05-03 16:52:18,823 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:52:19,106 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-05-03 16:52:19,291 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:52:19,486 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 16:52:19,869 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-05-03 16:52:20,494 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 16:52:20,834 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-03 16:52:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:52:21,189 INFO L93 Difference]: Finished difference Result 2113 states and 6944 transitions. [2021-05-03 16:52:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:52:21,190 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:52:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:52:21,195 INFO L225 Difference]: With dead ends: 2113 [2021-05-03 16:52:21,195 INFO L226 Difference]: Without dead ends: 2084 [2021-05-03 16:52:21,196 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 3250.4ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:52:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-05-03 16:52:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1629. [2021-05-03 16:52:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.3624078624078626) internal successors, (5474), 1628 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5474 transitions. [2021-05-03 16:52:21,234 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5474 transitions. Word has length 26 [2021-05-03 16:52:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:52:21,234 INFO L480 AbstractCegarLoop]: Abstraction has 1629 states and 5474 transitions. [2021-05-03 16:52:21,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5474 transitions. [2021-05-03 16:52:21,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:52:21,238 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:52:21,238 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:52:21,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:52:21,438 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:52:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:52:21,439 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 19 times [2021-05-03 16:52:21,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:52:21,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169323548] [2021-05-03 16:52:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:52:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:21,729 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-03 16:52:21,863 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-03 16:52:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:22,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169323548] [2021-05-03 16:52:22,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044046503] [2021-05-03 16:52:22,014 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 [2021-05-03 16:52:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:22,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:52:22,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:52:22,641 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:52:22,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:22,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:22,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:22,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:52:22,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:22,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:22,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:22,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:52:22,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:22,942 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-05-03 16:52:22,943 INFO L628 ElimStorePlain]: treesize reduction 116, result has 40.5 percent of original size [2021-05-03 16:52:22,943 INFO L518 ElimStorePlain]: Eliminatee v_prenex_144 vanished before elimination [2021-05-03 16:52:22,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:52:22,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:22,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:23,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:23,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:23,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:52:23,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:23,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:23,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:52:23,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:31 [2021-05-03 16:52:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:23,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:52:23,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 16:52:23,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993489588] [2021-05-03 16:52:23,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:52:23,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:52:23,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:52:23,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:52:23,126 INFO L87 Difference]: Start difference. First operand 1629 states and 5474 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:23,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:52:23,931 INFO L93 Difference]: Finished difference Result 1830 states and 6039 transitions. [2021-05-03 16:52:23,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:52:23,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:52:23,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:52:23,937 INFO L225 Difference]: With dead ends: 1830 [2021-05-03 16:52:23,937 INFO L226 Difference]: Without dead ends: 1815 [2021-05-03 16:52:23,937 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1240.1ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:52:23,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-05-03 16:52:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1635. [2021-05-03 16:52:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.364137086903305) internal successors, (5497), 1634 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5497 transitions. [2021-05-03 16:52:23,966 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5497 transitions. Word has length 26 [2021-05-03 16:52:23,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:52:23,966 INFO L480 AbstractCegarLoop]: Abstraction has 1635 states and 5497 transitions. [2021-05-03 16:52:23,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5497 transitions. [2021-05-03 16:52:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:52:23,970 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:52:23,970 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:52:24,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-05-03 16:52:24,173 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:52:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:52:24,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1766954001, now seen corresponding path program 20 times [2021-05-03 16:52:24,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:52:24,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96031124] [2021-05-03 16:52:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:52:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:24,434 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-03 16:52:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:24,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96031124] [2021-05-03 16:52:24,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496770582] [2021-05-03 16:52:24,676 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 [2021-05-03 16:52:24,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:52:24,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:52:24,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:52:24,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:52:25,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,180 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:25,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-05-03 16:52:25,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:25,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 24 [2021-05-03 16:52:25,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,271 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:25,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 20 [2021-05-03 16:52:25,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:25,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-05-03 16:52:25,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,366 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:52:25,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:52:25,369 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,405 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:52:25,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:52:25,407 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,439 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:52:25,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:52:25,442 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,487 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:25,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 20 [2021-05-03 16:52:25,491 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,531 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:52:25,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-05-03 16:52:25,533 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,570 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:52:25,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:52:25,572 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,620 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:25,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-05-03 16:52:25,625 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:25,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-05-03 16:52:25,679 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,711 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:52:25,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:52:25,713 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,746 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:52:25,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:52:25,748 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,778 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:52:25,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 16 [2021-05-03 16:52:25,781 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:25,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:25,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:25,802 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:52:25,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:52:25,804 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:26,019 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 16:52:26,020 INFO L628 ElimStorePlain]: treesize reduction 27, result has 79.9 percent of original size [2021-05-03 16:52:26,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:52:26,023 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:697, output treesize:107 [2021-05-03 16:52:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:26,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:52:26,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:52:26,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225283605] [2021-05-03 16:52:26,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:52:26,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:52:26,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:52:26,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:52:26,233 INFO L87 Difference]: Start difference. First operand 1635 states and 5497 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:27,590 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-05-03 16:52:28,001 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-05-03 16:52:28,197 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:52:28,601 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2021-05-03 16:52:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:52:29,095 INFO L93 Difference]: Finished difference Result 2330 states and 7580 transitions. [2021-05-03 16:52:29,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:52:29,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:52:29,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:52:29,102 INFO L225 Difference]: With dead ends: 2330 [2021-05-03 16:52:29,102 INFO L226 Difference]: Without dead ends: 2284 [2021-05-03 16:52:29,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2714.9ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:52:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-05-03 16:52:29,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1679. [2021-05-03 16:52:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 3.365315852205006) internal successors, (5647), 1678 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 5647 transitions. [2021-05-03 16:52:29,139 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 5647 transitions. Word has length 26 [2021-05-03 16:52:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:52:29,140 INFO L480 AbstractCegarLoop]: Abstraction has 1679 states and 5647 transitions. [2021-05-03 16:52:29,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 5647 transitions. [2021-05-03 16:52:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:52:29,145 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:52:29,145 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:52:29,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:52:29,346 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:52:29,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:52:29,346 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 21 times [2021-05-03 16:52:29,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:52:29,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892597386] [2021-05-03 16:52:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:52:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:29,635 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-03 16:52:29,819 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-05-03 16:52:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:30,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892597386] [2021-05-03 16:52:30,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056854943] [2021-05-03 16:52:30,108 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 [2021-05-03 16:52:30,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:52:30,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:52:30,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:52:30,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:52:30,521 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:52:30,894 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 16:52:31,341 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-05-03 16:52:31,492 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_158], 2=[A, v_prenex_157]} [2021-05-03 16:52:31,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:31,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:52:31,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:31,766 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:52:31,767 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-05-03 16:52:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:31,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:31,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:52:31,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:31,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:31,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:31,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:31,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:31,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:52:31,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:31,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:31,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:52:31,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:32,013 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 16:52:32,014 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-05-03 16:52:32,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:52:32,017 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-05-03 16:52:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:32,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:52:32,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:52:32,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291072198] [2021-05-03 16:52:32,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:52:32,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:52:32,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:52:32,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:52:32,107 INFO L87 Difference]: Start difference. First operand 1679 states and 5647 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:32,967 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-05-03 16:52:33,304 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:52:33,745 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 16:52:34,379 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-05-03 16:52:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:52:34,805 INFO L93 Difference]: Finished difference Result 2346 states and 7644 transitions. [2021-05-03 16:52:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:52:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:52:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:52:34,811 INFO L225 Difference]: With dead ends: 2346 [2021-05-03 16:52:34,811 INFO L226 Difference]: Without dead ends: 2289 [2021-05-03 16:52:34,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 3444.1ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:52:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-05-03 16:52:34,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1714. [2021-05-03 16:52:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.3736135434909515) internal successors, (5779), 1713 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5779 transitions. [2021-05-03 16:52:34,849 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5779 transitions. Word has length 26 [2021-05-03 16:52:34,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:52:34,849 INFO L480 AbstractCegarLoop]: Abstraction has 1714 states and 5779 transitions. [2021-05-03 16:52:34,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5779 transitions. [2021-05-03 16:52:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:52:34,852 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:52:34,852 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:52:35,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1171,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:52:35,053 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:52:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:52:35,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 22 times [2021-05-03 16:52:35,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:52:35,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268046618] [2021-05-03 16:52:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:52:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:35,659 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-05-03 16:52:35,931 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2021-05-03 16:52:36,112 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 16:52:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:36,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268046618] [2021-05-03 16:52:36,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609356568] [2021-05-03 16:52:36,243 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 [2021-05-03 16:52:36,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:52:36,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:52:36,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:52:36,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:52:36,919 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:52:37,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:37,228 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:52:37,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:52:37,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:37,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:37,300 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:52:37,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2021-05-03 16:52:37,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:38,077 WARN L205 SmtUtils]: Spent 772.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 153 [2021-05-03 16:52:38,078 INFO L628 ElimStorePlain]: treesize reduction 153, result has 71.2 percent of original size [2021-05-03 16:52:38,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:38,133 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:52:38,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:52:38,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:38,456 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-03 16:52:38,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:38,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:38,501 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:52:38,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:52:38,507 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:38,842 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-03 16:52:38,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:38,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:38,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:38,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:52:38,908 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:39,563 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-05-03 16:52:39,564 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-05-03 16:52:39,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:39,615 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:52:39,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:52:39,620 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:39,910 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-03 16:52:39,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:39,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:39,975 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:52:39,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:52:39,979 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:40,275 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-03 16:52:40,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:40,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:40,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:40,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:52:40,333 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:40,357 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:52:40,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:52:40,360 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:40,825 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2021-05-03 16:52:40,826 INFO L628 ElimStorePlain]: treesize reduction 34, result has 88.2 percent of original size [2021-05-03 16:52:40,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:40,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:40,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:52:40,870 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:41,075 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-03 16:52:41,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:41,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:52:41,109 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:563, output treesize:231 [2021-05-03 16:52:41,366 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-03 16:52:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:41,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:52:41,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:52:41,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479424297] [2021-05-03 16:52:41,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:52:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:52:41,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:52:41,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:52:41,447 INFO L87 Difference]: Start difference. First operand 1714 states and 5779 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:41,721 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 26 [2021-05-03 16:52:42,181 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-05-03 16:52:42,773 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-05-03 16:52:43,137 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:52:43,691 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 16:52:43,890 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:52:44,446 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 16:52:44,840 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:52:45,139 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2021-05-03 16:52:45,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:52:45,214 INFO L93 Difference]: Finished difference Result 2805 states and 9046 transitions. [2021-05-03 16:52:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:52:45,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:52:45,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:52:45,221 INFO L225 Difference]: With dead ends: 2805 [2021-05-03 16:52:45,222 INFO L226 Difference]: Without dead ends: 2750 [2021-05-03 16:52:45,222 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 4369.1ms TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:52:45,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-05-03 16:52:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1711. [2021-05-03 16:52:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.374269005847953) internal successors, (5770), 1710 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 5770 transitions. [2021-05-03 16:52:45,260 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 5770 transitions. Word has length 26 [2021-05-03 16:52:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:52:45,260 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 5770 transitions. [2021-05-03 16:52:45,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 5770 transitions. [2021-05-03 16:52:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:52:45,263 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:52:45,263 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:52:45,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1184,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:52:45,464 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:52:45,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:52:45,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 23 times [2021-05-03 16:52:45,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:52:45,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065663320] [2021-05-03 16:52:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:52:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:45,747 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-05-03 16:52:45,872 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-05-03 16:52:46,003 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-03 16:52:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:46,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065663320] [2021-05-03 16:52:46,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736119337] [2021-05-03 16:52:46,142 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 [2021-05-03 16:52:46,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:52:46,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:52:46,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:52:46,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:52:46,680 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:52:46,908 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-05-03 16:52:47,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:47,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:47,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-05-03 16:52:47,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:47,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:47,199 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:47,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:52:47,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:47,958 WARN L205 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-05-03 16:52:47,959 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.2 percent of original size [2021-05-03 16:52:47,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:47,999 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:48,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:52:48,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:48,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:48,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:52:48,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:48,366 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 16:52:48,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:48,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:48,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:48,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:52:48,405 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:48,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:48,431 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:48,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:52:48,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:48,736 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 16:52:48,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:48,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:48,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:48,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:52:48,774 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:48,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:48,797 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:48,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:52:48,800 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:49,055 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 16:52:49,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:49,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:49,086 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:52:49,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:52:49,090 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:49,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:49,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:49,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:52:49,120 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:49,345 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:52:49,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:49,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:52:49,355 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:391, output treesize:176 [2021-05-03 16:52:49,581 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-05-03 16:52:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:49,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:52:49,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:52:49,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878021084] [2021-05-03 16:52:49,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:52:49,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:52:49,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:52:49,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:52:49,671 INFO L87 Difference]: Start difference. First operand 1711 states and 5770 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:49,886 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 26 [2021-05-03 16:52:50,336 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-05-03 16:52:50,797 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-03 16:52:51,332 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:52:51,826 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2021-05-03 16:52:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:52:52,294 INFO L93 Difference]: Finished difference Result 2323 states and 7626 transitions. [2021-05-03 16:52:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:52:52,296 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:52:52,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:52:52,300 INFO L225 Difference]: With dead ends: 2323 [2021-05-03 16:52:52,300 INFO L226 Difference]: Without dead ends: 2277 [2021-05-03 16:52:52,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 3131.7ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:52:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-05-03 16:52:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1711. [2021-05-03 16:52:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.374269005847953) internal successors, (5770), 1710 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 5770 transitions. [2021-05-03 16:52:52,331 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 5770 transitions. Word has length 26 [2021-05-03 16:52:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:52:52,331 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 5770 transitions. [2021-05-03 16:52:52,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 5770 transitions. [2021-05-03 16:52:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:52:52,335 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:52:52,335 INFO L551 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] [2021-05-03 16:52:52,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1224 [2021-05-03 16:52:52,537 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:52:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:52:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash -39476015, now seen corresponding path program 42 times [2021-05-03 16:52:52,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:52:52,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872129384] [2021-05-03 16:52:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:52:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:52,901 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 16:52:53,102 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 16:52:53,255 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 16:52:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:53,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872129384] [2021-05-03 16:52:53,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830286264] [2021-05-03 16:52:53,449 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 [2021-05-03 16:52:53,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:52:53,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:52:53,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:52:53,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:52:54,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:52:54,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:52:54,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-05-03 16:52:54,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:52:54,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-05-03 16:52:54,761 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:52:54,780 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:52:54,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:52:54,825 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:52:54,846 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:52:54,867 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:52:54,890 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-05-03 16:52:54,913 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:52:54,933 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:52:54,945 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:54,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:54,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:54,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:52:54,955 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:55,002 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-05-03 16:52:55,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:52:55,006 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:52:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:55,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:52:55,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:52:55,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806345645] [2021-05-03 16:52:55,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:52:55,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:52:55,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:52:55,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:52:55,064 INFO L87 Difference]: Start difference. First operand 1711 states and 5770 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:55,969 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2021-05-03 16:52:57,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:52:57,280 INFO L93 Difference]: Finished difference Result 2167 states and 7120 transitions. [2021-05-03 16:52:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:52:57,282 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:52:57,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:52:57,287 INFO L225 Difference]: With dead ends: 2167 [2021-05-03 16:52:57,287 INFO L226 Difference]: Without dead ends: 2141 [2021-05-03 16:52:57,287 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 2357.1ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:52:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-05-03 16:52:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1715. [2021-05-03 16:52:57,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1714 states have (on average 3.372228704784131) internal successors, (5780), 1714 states have internal predecessors, (5780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 5780 transitions. [2021-05-03 16:52:57,321 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 5780 transitions. Word has length 26 [2021-05-03 16:52:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:52:57,321 INFO L480 AbstractCegarLoop]: Abstraction has 1715 states and 5780 transitions. [2021-05-03 16:52:57,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:57,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 5780 transitions. [2021-05-03 16:52:57,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:52:57,324 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:52:57,324 INFO L551 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] [2021-05-03 16:52:57,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1260 [2021-05-03 16:52:57,529 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:52:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:52:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-05-03 16:52:57,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:52:57,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157592396] [2021-05-03 16:52:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:52:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:57,778 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 16:52:57,925 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-03 16:52:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:58,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157592396] [2021-05-03 16:52:58,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254035019] [2021-05-03 16:52:58,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:52:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:58,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:52:58,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:52:58,903 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-05-03 16:52:59,022 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_191, v_prenex_193], 5=[A, v_prenex_189]} [2021-05-03 16:52:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:59,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:59,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:52:59,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:59,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:59,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:59,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:52:59,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:59,256 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-03 16:52:59,257 INFO L628 ElimStorePlain]: treesize reduction 128, result has 41.0 percent of original size [2021-05-03 16:52:59,257 INFO L518 ElimStorePlain]: Eliminatee v_prenex_193 vanished before elimination [2021-05-03 16:52:59,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:59,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:59,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-05-03 16:52:59,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:59,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:59,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:52:59,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:52:59,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-05-03 16:52:59,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:52:59,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:52:59,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:52:59,397 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:31 [2021-05-03 16:52:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:59,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:52:59,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:52:59,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741321751] [2021-05-03 16:52:59,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:52:59,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:52:59,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:52:59,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:52:59,495 INFO L87 Difference]: Start difference. First operand 1715 states and 5780 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:00,203 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-03 16:53:00,354 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-05-03 16:53:00,520 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2021-05-03 16:53:00,883 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-05-03 16:53:01,090 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 31 [2021-05-03 16:53:01,229 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-05-03 16:53:01,387 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-05-03 16:53:01,868 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2021-05-03 16:53:02,053 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2021-05-03 16:53:02,259 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-05-03 16:53:02,849 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-05-03 16:53:03,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:53:03,398 INFO L93 Difference]: Finished difference Result 2392 states and 7841 transitions. [2021-05-03 16:53:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:53:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:53:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:53:03,403 INFO L225 Difference]: With dead ends: 2392 [2021-05-03 16:53:03,404 INFO L226 Difference]: Without dead ends: 2377 [2021-05-03 16:53:03,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 3977.0ms TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:53:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2021-05-03 16:53:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1721. [2021-05-03 16:53:03,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.3738372093023257) internal successors, (5803), 1720 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5803 transitions. [2021-05-03 16:53:03,440 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5803 transitions. Word has length 26 [2021-05-03 16:53:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:53:03,441 INFO L480 AbstractCegarLoop]: Abstraction has 1721 states and 5803 transitions. [2021-05-03 16:53:03,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5803 transitions. [2021-05-03 16:53:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:53:03,445 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:53:03,445 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:53:03,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-05-03 16:53:03,658 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:53:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:53:03,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 24 times [2021-05-03 16:53:03,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:53:03,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268226360] [2021-05-03 16:53:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:53:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:53:04,051 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 16:53:04,215 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 16:53:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:53:04,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268226360] [2021-05-03 16:53:04,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52134066] [2021-05-03 16:53:04,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:53:04,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:53:04,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:53:04,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:53:04,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:53:05,042 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:53:05,418 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 16:53:06,558 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:53:06,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:53:06,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:06,635 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:53:06,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-05-03 16:53:06,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:07,654 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 132 DAG size of output: 128 [2021-05-03 16:53:07,655 INFO L628 ElimStorePlain]: treesize reduction 72, result has 84.9 percent of original size [2021-05-03 16:53:07,692 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:53:07,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:53:07,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:07,912 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-03 16:53:07,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:53:07,950 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:53:07,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:53:07,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:08,376 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-03 16:53:08,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:53:08,426 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:53:08,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:53:08,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:08,819 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-05-03 16:53:08,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:53:08,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:53:08,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:53:08,871 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:08,889 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:53:08,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:53:08,891 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:09,531 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-05-03 16:53:09,532 INFO L628 ElimStorePlain]: treesize reduction 23, result has 93.3 percent of original size [2021-05-03 16:53:09,578 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:53:09,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:53:09,588 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:09,874 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-05-03 16:53:09,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:53:09,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:53:09,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:53:09,916 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:10,204 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-03 16:53:10,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:53:10,253 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:53:10,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:53:10,258 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:10,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:53:10,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:53:10,299 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:10,816 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-05-03 16:53:10,816 INFO L628 ElimStorePlain]: treesize reduction 31, result has 88.7 percent of original size [2021-05-03 16:53:10,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:53:10,838 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:539, output treesize:404 [2021-05-03 16:53:11,233 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-05-03 16:53:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:53:11,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:53:11,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:53:11,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702237716] [2021-05-03 16:53:11,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:53:11,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:53:11,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:53:11,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:53:11,487 INFO L87 Difference]: Start difference. First operand 1721 states and 5803 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:11,805 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 25 [2021-05-03 16:53:12,066 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-05-03 16:53:12,305 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-03 16:53:12,473 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-05-03 16:53:12,716 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-05-03 16:53:12,989 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:53:13,321 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2021-05-03 16:53:13,559 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-05-03 16:53:13,805 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-05-03 16:53:14,149 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:53:14,608 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-03 16:53:14,916 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-05-03 16:53:15,439 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-05-03 16:53:15,995 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-05-03 16:53:16,416 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-05-03 16:53:17,297 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-05-03 16:53:17,785 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2021-05-03 16:53:18,825 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-05-03 16:53:20,211 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 130 DAG size of output: 93 [2021-05-03 16:53:21,723 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2021-05-03 16:53:22,315 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-05-03 16:53:23,710 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2021-05-03 16:53:24,096 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2021-05-03 16:53:24,521 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2021-05-03 16:53:24,800 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-05-03 16:53:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:53:25,009 INFO L93 Difference]: Finished difference Result 2749 states and 8697 transitions. [2021-05-03 16:53:25,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:53:25,011 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:53:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:53:25,016 INFO L225 Difference]: With dead ends: 2749 [2021-05-03 16:53:25,016 INFO L226 Difference]: Without dead ends: 2685 [2021-05-03 16:53:25,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 13884.2ms TimeCoverageRelationStatistics Valid=471, Invalid=2181, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:53:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-05-03 16:53:25,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1753. [2021-05-03 16:53:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.384132420091324) internal successors, (5929), 1752 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5929 transitions. [2021-05-03 16:53:25,057 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5929 transitions. Word has length 26 [2021-05-03 16:53:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:53:25,057 INFO L480 AbstractCegarLoop]: Abstraction has 1753 states and 5929 transitions. [2021-05-03 16:53:25,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5929 transitions. [2021-05-03 16:53:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:53:25,060 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:53:25,060 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:53:25,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1388,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:53:25,261 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:53:25,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:53:25,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1125767463, now seen corresponding path program 25 times [2021-05-03 16:53:25,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:53:25,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350148660] [2021-05-03 16:53:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:53:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:53:25,633 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-05-03 16:53:25,778 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 16:53:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:53:25,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350148660] [2021-05-03 16:53:25,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37576002] [2021-05-03 16:53:25,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:53:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:53:26,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:53:26,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:53:26,734 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:53:27,115 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-05-03 16:53:27,242 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_232], 2=[A, v_prenex_231]} [2021-05-03 16:53:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:53:27,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:53:27,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:27,515 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:53:27,516 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-05-03 16:53:27,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:53:27,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:53:27,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:53:27,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:53:27,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:27,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:53:27,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:53:27,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:27,681 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 16:53:27,682 INFO L628 ElimStorePlain]: treesize reduction 15, result has 81.5 percent of original size [2021-05-03 16:53:27,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:53:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:53:27,690 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 23 treesize of output 13 [2021-05-03 16:53:27,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:27,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:53:27,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:53:27,745 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-05-03 16:53:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:53:27,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:53:27,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:53:27,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320121836] [2021-05-03 16:53:27,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:53:27,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:53:27,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:53:27,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:53:27,827 INFO L87 Difference]: Start difference. First operand 1753 states and 5929 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:28,117 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 26 [2021-05-03 16:53:28,438 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 16:53:28,706 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-03 16:53:29,118 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-03 16:53:29,676 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-05-03 16:53:30,277 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 16:53:31,063 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-05-03 16:53:31,445 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-05-03 16:53:32,053 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-05-03 16:53:32,899 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2021-05-03 16:53:33,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:53:33,730 INFO L93 Difference]: Finished difference Result 2673 states and 8553 transitions. [2021-05-03 16:53:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:53:33,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:53:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:53:33,737 INFO L225 Difference]: With dead ends: 2673 [2021-05-03 16:53:33,737 INFO L226 Difference]: Without dead ends: 2628 [2021-05-03 16:53:33,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 5508.0ms TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:53:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-05-03 16:53:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 1772. [2021-05-03 16:53:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.3969508752117448) internal successors, (6016), 1771 states have internal predecessors, (6016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 6016 transitions. [2021-05-03 16:53:33,779 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 6016 transitions. Word has length 26 [2021-05-03 16:53:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:53:33,779 INFO L480 AbstractCegarLoop]: Abstraction has 1772 states and 6016 transitions. [2021-05-03 16:53:33,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 6016 transitions. [2021-05-03 16:53:33,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:53:33,783 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:53:33,783 INFO L551 BasicCegarLoop]: 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] [2021-05-03 16:53:33,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1466 [2021-05-03 16:53:33,983 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:53:33,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:53:33,984 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 26 times [2021-05-03 16:53:33,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:53:33,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414294279] [2021-05-03 16:53:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:53:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:53:34,325 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-05-03 16:53:34,518 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-03 16:53:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:53:34,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414294279] [2021-05-03 16:53:34,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197827102] [2021-05-03 16:53:34,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 16:53:34,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:53:34,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:53:34,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 16:53:34,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:53:35,349 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:53:35,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:53:35,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,381 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:53:35,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:53:35,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,444 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:53:35,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:53:35,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,508 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:53:35,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:53:35,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:53:35,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-05-03 16:53:35,575 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,602 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:53:35,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-05-03 16:53:35,605 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,662 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:53:35,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:53:35,667 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,705 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:53:35,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:53:35,707 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,737 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:53:35,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:53:35,738 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,799 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:53:35,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:53:35,810 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,837 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:53:35,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:53:35,839 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,870 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:53:35,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:53:35,871 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,931 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:53:35,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2021-05-03 16:53:35,934 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,950 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:53:35,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:53:35,951 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:35,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:53:35,988 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:53:36,004 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:36,025 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:53:36,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 1 [2021-05-03 16:53:36,027 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:53:36,412 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-05-03 16:53:36,413 INFO L628 ElimStorePlain]: treesize reduction 60, result has 75.1 percent of original size [2021-05-03 16:53:36,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:53:36,416 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:797, output treesize:181 [2021-05-03 16:53:36,636 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:53:36,870 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:53:37,076 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-05-03 16:53:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:53:37,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:53:37,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-05-03 16:53:37,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072303772] [2021-05-03 16:53:37,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:53:37,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:53:37,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:53:37,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:53:37,172 INFO L87 Difference]: Start difference. First operand 1772 states and 6016 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:37,462 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-03 16:53:37,829 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-03 16:53:38,162 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-03 16:53:38,318 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-03 16:53:38,595 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-05-03 16:53:38,809 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-05-03 16:53:39,205 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-05-03 16:53:39,358 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:53:39,807 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-03 16:53:40,416 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-03 16:53:41,193 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-03 16:53:41,436 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:53:41,873 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-05-03 16:53:42,520 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-05-03 16:53:43,156 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:53:43,749 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-03 16:53:44,014 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:53:44,316 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2021-05-03 16:53:44,664 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-05-03 16:53:44,874 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2021-05-03 16:53:45,254 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-05-03 16:53:45,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:53:45,407 INFO L93 Difference]: Finished difference Result 3469 states and 10718 transitions. [2021-05-03 16:53:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:53:45,408 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:53:45,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:53:45,408 INFO L225 Difference]: With dead ends: 3469 [2021-05-03 16:53:45,408 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 16:53:45,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 8048.0ms TimeCoverageRelationStatistics Valid=532, Invalid=2120, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:53:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 16:53:45,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 16:53:45,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:45,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 16:53:45,409 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-05-03 16:53:45,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:53:45,409 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 16:53:45,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:53:45,409 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 16:53:45,409 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 16:53:45,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-05-03 16:53:45,614 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:53:45 BasicIcfg [2021-05-03 16:53:45,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:53:45,615 INFO L168 Benchmark]: Toolchain (without parser) took 267710.00 ms. Allocated memory was 339.7 MB in the beginning and 589.3 MB in the end (delta: 249.6 MB). Free memory was 319.1 MB in the beginning and 242.8 MB in the end (delta: 76.3 MB). Peak memory consumption was 328.0 MB. Max. memory is 16.0 GB. [2021-05-03 16:53:45,615 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 339.7 MB. Free memory was 320.3 MB in the beginning and 320.2 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:53:45,615 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.12 ms. Allocated memory is still 339.7 MB. Free memory was 319.0 MB in the beginning and 317.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:53:45,615 INFO L168 Benchmark]: Boogie Preprocessor took 30.16 ms. Allocated memory is still 339.7 MB. Free memory was 317.6 MB in the beginning and 316.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 16:53:45,615 INFO L168 Benchmark]: RCFGBuilder took 272.23 ms. Allocated memory is still 339.7 MB. Free memory was 316.5 MB in the beginning and 303.9 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 16:53:45,615 INFO L168 Benchmark]: TraceAbstraction took 267341.65 ms. Allocated memory was 339.7 MB in the beginning and 589.3 MB in the end (delta: 249.6 MB). Free memory was 303.5 MB in the beginning and 242.8 MB in the end (delta: 60.7 MB). Peak memory consumption was 311.2 MB. Max. memory is 16.0 GB. [2021-05-03 16:53:45,616 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 0.26 ms. Allocated memory is still 339.7 MB. Free memory was 320.3 MB in the beginning and 320.2 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 35.12 ms. Allocated memory is still 339.7 MB. Free memory was 319.0 MB in the beginning and 317.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 30.16 ms. Allocated memory is still 339.7 MB. Free memory was 317.6 MB in the beginning and 316.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 272.23 ms. Allocated memory is still 339.7 MB. Free memory was 316.5 MB in the beginning and 303.9 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 267341.65 ms. Allocated memory was 339.7 MB in the beginning and 589.3 MB in the end (delta: 249.6 MB). Free memory was 303.5 MB in the beginning and 242.8 MB in the end (delta: 60.7 MB). Peak memory consumption was 311.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 65]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 267222.8ms, OverallIterations: 72, TraceHistogramMax: 2, EmptinessCheckTime: 217.8ms, AutomataDifference: 152074.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 42.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2825 SDtfs, 15348 SDslu, 20185 SDs, 0 SdLazy, 34825 SolverSat, 2513 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28991.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3670 GetRequests, 1325 SyntacticMatches, 69 SemanticMatches, 2276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25970 ImplicationChecksByTransitivity, 148433.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1772occurred in iteration=71, InterpolantAutomatonStates: 1876, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2362.3ms AutomataMinimizationTime, 72 MinimizatonAttempts, 54942 StatesRemovedByMinimization, 71 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 303.4ms SsaConstructionTime, 1102.3ms SatisfiabilityAnalysisTime, 94909.6ms InterpolantComputationTime, 3478 NumberOfCodeBlocks, 3478 NumberOfCodeBlocksAsserted, 218 NumberOfCheckSat, 3337 ConstructedInterpolants, 57 QuantifiedInterpolants, 67163 SizeOfPredicates, 316 NumberOfNonLiveVariables, 4344 ConjunctsInSsa, 1087 ConjunctsInUnsatCore, 141 InterpolantComputations, 3 PerfectInterpolantSequences, 107/750 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 proved your program to be correct! Received shutdown request...