/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/parallel/min-max-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:55:29,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:55:29,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:55:29,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:55:29,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:55:29,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:55:29,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:55:29,620 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 [2021-02-19 17:55:29,647 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:55:29,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:55:29,648 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:55:29,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:55:29,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:55:29,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:55:29,651 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:55:29,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:55:29,651 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:55:29,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:55:29,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:55:29,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:55:29,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:55:29,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:55:29,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:55:29,652 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:55:29,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:55:29,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:55:29,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:55:29,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:55:29,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:55:29,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:55:29,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:55:29,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:55:29,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:55:29,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:55:29,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:55:29,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:55:29,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:55:29,654 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:55:29,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:55:29,654 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:55:29,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:55:29,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:55:29,926 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:55:29,927 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:55:29,928 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:55:29,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl [2021-02-19 17:55:29,929 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/min-max-2.wvr.bpl' [2021-02-19 17:55:29,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:55:29,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:55:29,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:55:29,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:55:29,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:55:29,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:55:29" (1/1) ... [2021-02-19 17:55:29,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:55:29" (1/1) ... [2021-02-19 17:55:29,985 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:55:29,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:55:29,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:55:29,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:55:29,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:55:29" (1/1) ... [2021-02-19 17:55:29,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:55:29" (1/1) ... [2021-02-19 17:55:29,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:55:29" (1/1) ... [2021-02-19 17:55:29,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:55:29" (1/1) ... [2021-02-19 17:55:30,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:55:29" (1/1) ... [2021-02-19 17:55:30,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:55:29" (1/1) ... [2021-02-19 17:55:30,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:55:29" (1/1) ... [2021-02-19 17:55:30,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:55:30,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:55:30,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:55:30,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:55:30,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:55:29" (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 [2021-02-19 17:55:30,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:55:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:55:30,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:55:30,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:55:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:55:30,074 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:55:30,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:55:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:55:30,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:55:30,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 17:55:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 17:55:30,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 17:55:30,075 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 17:55:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 17:55:30,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 17:55:30,075 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-02-19 17:55:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-02-19 17:55:30,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-02-19 17:55:30,076 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:55:30,270 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:55:30,271 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:55:30,271 INFO L202 PluginConnector]: Adding new model min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:55:30 BoogieIcfgContainer [2021-02-19 17:55:30,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:55:30,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:55:30,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:55:30,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:55:30,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:55:29" (1/2) ... [2021-02-19 17:55:30,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d34dcb9 and model type min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:55:30, skipping insertion in model container [2021-02-19 17:55:30,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:55:30" (2/2) ... [2021-02-19 17:55:30,276 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-2.wvr.bpl [2021-02-19 17:55:30,296 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:55:30,296 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:55:30,299 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:55:30,299 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:55:30,374 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-02-19 17:55:30,385 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-02-19 17:55:30,413 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:55:30,413 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:55:30,413 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:55:30,413 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:55:30,413 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:55:30,413 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:55:30,413 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:55:30,413 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:55:30,436 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 46 transitions, 132 flow [2021-02-19 17:55:30,788 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:30,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:55:30,884 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:30,885 INFO L506 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, 1, 1, 1] [2021-02-19 17:55:30,886 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:30,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:30,894 INFO L82 PathProgramCache]: Analyzing trace with hash -84011710, now seen corresponding path program 1 times [2021-02-19 17:55:30,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:30,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777881253] [2021-02-19 17:55:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:31,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777881253] [2021-02-19 17:55:31,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:31,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:55:31,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981715688] [2021-02-19 17:55:31,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:55:31,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:31,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:55:31,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:31,082 INFO L87 Difference]: Start difference. First operand has 5826 states, 5824 states have (on average 4.669127747252747) internal successors, (27193), 5825 states have internal predecessors, (27193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:31,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:31,522 INFO L93 Difference]: Finished difference Result 23171 states and 106643 transitions. [2021-02-19 17:55:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:55:31,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:55:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:31,731 INFO L225 Difference]: With dead ends: 23171 [2021-02-19 17:55:31,731 INFO L226 Difference]: Without dead ends: 15763 [2021-02-19 17:55:31,732 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:55:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15763 states. [2021-02-19 17:55:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15763 to 7383. [2021-02-19 17:55:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7383 states, 7382 states have (on average 4.632078027634788) internal successors, (34194), 7382 states have internal predecessors, (34194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7383 states to 7383 states and 34194 transitions. [2021-02-19 17:55:32,266 INFO L78 Accepts]: Start accepts. Automaton has 7383 states and 34194 transitions. Word has length 27 [2021-02-19 17:55:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:32,266 INFO L480 AbstractCegarLoop]: Abstraction has 7383 states and 34194 transitions. [2021-02-19 17:55:32,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 7383 states and 34194 transitions. [2021-02-19 17:55:32,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:55:32,291 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:32,291 INFO L506 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, 1, 1, 1] [2021-02-19 17:55:32,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:55:32,292 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:32,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:32,294 INFO L82 PathProgramCache]: Analyzing trace with hash -547772732, now seen corresponding path program 2 times [2021-02-19 17:55:32,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:32,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923298393] [2021-02-19 17:55:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:32,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923298393] [2021-02-19 17:55:32,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:32,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:55:32,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545941037] [2021-02-19 17:55:32,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:32,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:32,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:32,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:32,353 INFO L87 Difference]: Start difference. First operand 7383 states and 34194 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:32,527 INFO L93 Difference]: Finished difference Result 9446 states and 43398 transitions. [2021-02-19 17:55:32,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:55:32,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:55:32,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:32,554 INFO L225 Difference]: With dead ends: 9446 [2021-02-19 17:55:32,555 INFO L226 Difference]: Without dead ends: 6583 [2021-02-19 17:55:32,555 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:32,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-02-19 17:55:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 6583. [2021-02-19 17:55:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.564570039501671) internal successors, (30044), 6582 states have internal predecessors, (30044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 30044 transitions. [2021-02-19 17:55:32,813 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 30044 transitions. Word has length 27 [2021-02-19 17:55:32,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:32,814 INFO L480 AbstractCegarLoop]: Abstraction has 6583 states and 30044 transitions. [2021-02-19 17:55:32,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 30044 transitions. [2021-02-19 17:55:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:55:32,832 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:32,833 INFO L506 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, 1, 1, 1] [2021-02-19 17:55:32,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 17:55:32,834 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:32,834 INFO L82 PathProgramCache]: Analyzing trace with hash -855124606, now seen corresponding path program 3 times [2021-02-19 17:55:32,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:32,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108105280] [2021-02-19 17:55:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:32,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108105280] [2021-02-19 17:55:32,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:32,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 17:55:32,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293333105] [2021-02-19 17:55:32,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:55:32,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:32,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:55:32,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:32,872 INFO L87 Difference]: Start difference. First operand 6583 states and 30044 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:33,219 INFO L93 Difference]: Finished difference Result 22801 states and 103818 transitions. [2021-02-19 17:55:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:55:33,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:55:33,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:33,297 INFO L225 Difference]: With dead ends: 22801 [2021-02-19 17:55:33,299 INFO L226 Difference]: Without dead ends: 16593 [2021-02-19 17:55:33,299 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:55:33,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16593 states. [2021-02-19 17:55:33,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16593 to 6861. [2021-02-19 17:55:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6861 states, 6860 states have (on average 4.574052478134111) internal successors, (31378), 6860 states have internal predecessors, (31378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6861 states to 6861 states and 31378 transitions. [2021-02-19 17:55:33,690 INFO L78 Accepts]: Start accepts. Automaton has 6861 states and 31378 transitions. Word has length 27 [2021-02-19 17:55:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:33,690 INFO L480 AbstractCegarLoop]: Abstraction has 6861 states and 31378 transitions. [2021-02-19 17:55:33,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6861 states and 31378 transitions. [2021-02-19 17:55:33,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:55:33,709 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:33,710 INFO L506 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, 1, 1, 1] [2021-02-19 17:55:33,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:55:33,710 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:33,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:33,710 INFO L82 PathProgramCache]: Analyzing trace with hash 996653864, now seen corresponding path program 4 times [2021-02-19 17:55:33,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:33,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052465381] [2021-02-19 17:55:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:33,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052465381] [2021-02-19 17:55:33,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:33,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:55:33,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39330778] [2021-02-19 17:55:33,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:33,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:33,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:33,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:33,762 INFO L87 Difference]: Start difference. First operand 6861 states and 31378 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:33,815 INFO L93 Difference]: Finished difference Result 8424 states and 38332 transitions. [2021-02-19 17:55:33,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:55:33,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:55:33,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:33,839 INFO L225 Difference]: With dead ends: 8424 [2021-02-19 17:55:33,839 INFO L226 Difference]: Without dead ends: 6361 [2021-02-19 17:55:33,839 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:33,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-02-19 17:55:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6361. [2021-02-19 17:55:34,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6361 states, 6360 states have (on average 4.524842767295597) internal successors, (28778), 6360 states have internal predecessors, (28778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6361 states to 6361 states and 28778 transitions. [2021-02-19 17:55:34,101 INFO L78 Accepts]: Start accepts. Automaton has 6361 states and 28778 transitions. Word has length 27 [2021-02-19 17:55:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:34,101 INFO L480 AbstractCegarLoop]: Abstraction has 6361 states and 28778 transitions. [2021-02-19 17:55:34,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:34,102 INFO L276 IsEmpty]: Start isEmpty. Operand 6361 states and 28778 transitions. [2021-02-19 17:55:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:34,115 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:34,115 INFO L506 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, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:34,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 17:55:34,115 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:34,116 INFO L82 PathProgramCache]: Analyzing trace with hash 469464166, now seen corresponding path program 1 times [2021-02-19 17:55:34,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:34,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7369100] [2021-02-19 17:55:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:34,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7369100] [2021-02-19 17:55:34,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169805034] [2021-02-19 17:55:34,175 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 [2021-02-19 17:55:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:34,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 17:55:34,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:34,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:34,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 17:55:34,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282159872] [2021-02-19 17:55:34,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:55:34,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:34,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:55:34,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:55:34,389 INFO L87 Difference]: Start difference. First operand 6361 states and 28778 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-02-19 17:55:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:34,532 INFO L93 Difference]: Finished difference Result 13742 states and 61751 transitions. [2021-02-19 17:55:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:55:34,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 30 [2021-02-19 17:55:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:34,601 INFO L225 Difference]: With dead ends: 13742 [2021-02-19 17:55:34,601 INFO L226 Difference]: Without dead ends: 13742 [2021-02-19 17:55:34,601 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:55:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-02-19 17:55:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7994. [2021-02-19 17:55:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 4.5614913048917805) internal successors, (36460), 7993 states have internal predecessors, (36460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 36460 transitions. [2021-02-19 17:55:34,947 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 36460 transitions. Word has length 30 [2021-02-19 17:55:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:34,948 INFO L480 AbstractCegarLoop]: Abstraction has 7994 states and 36460 transitions. [2021-02-19 17:55:34,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-02-19 17:55:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 36460 transitions. [2021-02-19 17:55:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:34,977 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:34,977 INFO L506 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, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:35,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:35,190 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:35,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:35,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1452764259, now seen corresponding path program 1 times [2021-02-19 17:55:35,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:35,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905797256] [2021-02-19 17:55:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:35,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905797256] [2021-02-19 17:55:35,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548229796] [2021-02-19 17:55:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 17:55:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:35,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 17:55:35,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-02-19 17:55:35,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137789413] [2021-02-19 17:55:35,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:35,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:35,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:35,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:55:35,478 INFO L87 Difference]: Start difference. First operand 7994 states and 36460 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:35,568 INFO L93 Difference]: Finished difference Result 11412 states and 52000 transitions. [2021-02-19 17:55:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:55:35,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 17:55:35,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:35,606 INFO L225 Difference]: With dead ends: 11412 [2021-02-19 17:55:35,606 INFO L226 Difference]: Without dead ends: 11118 [2021-02-19 17:55:35,606 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:55:35,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-02-19 17:55:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 8742. [2021-02-19 17:55:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 8741 states have (on average 4.594554398810205) internal successors, (40161), 8741 states have internal predecessors, (40161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 40161 transitions. [2021-02-19 17:55:35,825 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 40161 transitions. Word has length 30 [2021-02-19 17:55:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:35,825 INFO L480 AbstractCegarLoop]: Abstraction has 8742 states and 40161 transitions. [2021-02-19 17:55:35,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:35,825 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 40161 transitions. [2021-02-19 17:55:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:35,843 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:35,843 INFO L506 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, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:36,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:36,061 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:36,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2092470021, now seen corresponding path program 1 times [2021-02-19 17:55:36,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:36,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978904356] [2021-02-19 17:55:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:36,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978904356] [2021-02-19 17:55:36,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:36,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:55:36,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041935948] [2021-02-19 17:55:36,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:36,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:36,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:36,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:36,087 INFO L87 Difference]: Start difference. First operand 8742 states and 40161 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:36,287 INFO L93 Difference]: Finished difference Result 15516 states and 70047 transitions. [2021-02-19 17:55:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:55:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 17:55:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:36,345 INFO L225 Difference]: With dead ends: 15516 [2021-02-19 17:55:36,345 INFO L226 Difference]: Without dead ends: 15386 [2021-02-19 17:55:36,345 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15386 states. [2021-02-19 17:55:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15386 to 12424. [2021-02-19 17:55:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 4.582065523625533) internal successors, (56923), 12423 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:36,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 56923 transitions. [2021-02-19 17:55:36,644 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 56923 transitions. Word has length 30 [2021-02-19 17:55:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:36,644 INFO L480 AbstractCegarLoop]: Abstraction has 12424 states and 56923 transitions. [2021-02-19 17:55:36,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 56923 transitions. [2021-02-19 17:55:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:36,673 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:36,673 INFO L506 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, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:36,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 17:55:36,673 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:36,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1121887134, now seen corresponding path program 1 times [2021-02-19 17:55:36,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:36,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899187216] [2021-02-19 17:55:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:36,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899187216] [2021-02-19 17:55:36,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:36,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:55:36,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619304187] [2021-02-19 17:55:36,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:36,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:36,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:36,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:36,698 INFO L87 Difference]: Start difference. First operand 12424 states and 56923 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:36,949 INFO L93 Difference]: Finished difference Result 22857 states and 102629 transitions. [2021-02-19 17:55:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:55:36,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 17:55:36,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:37,008 INFO L225 Difference]: With dead ends: 22857 [2021-02-19 17:55:37,009 INFO L226 Difference]: Without dead ends: 22667 [2021-02-19 17:55:37,009 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22667 states. [2021-02-19 17:55:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22667 to 18333. [2021-02-19 17:55:37,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18333 states, 18332 states have (on average 4.602280165830242) internal successors, (84369), 18332 states have internal predecessors, (84369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18333 states to 18333 states and 84369 transitions. [2021-02-19 17:55:37,671 INFO L78 Accepts]: Start accepts. Automaton has 18333 states and 84369 transitions. Word has length 30 [2021-02-19 17:55:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:37,672 INFO L480 AbstractCegarLoop]: Abstraction has 18333 states and 84369 transitions. [2021-02-19 17:55:37,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:37,673 INFO L276 IsEmpty]: Start isEmpty. Operand 18333 states and 84369 transitions. [2021-02-19 17:55:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:37,712 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:37,712 INFO L506 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, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:37,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:55:37,712 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:37,713 INFO L82 PathProgramCache]: Analyzing trace with hash -441360931, now seen corresponding path program 2 times [2021-02-19 17:55:37,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:37,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790597546] [2021-02-19 17:55:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:37,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790597546] [2021-02-19 17:55:37,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381227442] [2021-02-19 17:55:37,795 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 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 [2021-02-19 17:55:37,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:55:37,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 17:55:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:37,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:37,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-02-19 17:55:37,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763778195] [2021-02-19 17:55:37,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:55:37,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:55:37,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:55:37,909 INFO L87 Difference]: Start difference. First operand 18333 states and 84369 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:39,027 INFO L93 Difference]: Finished difference Result 64631 states and 282480 transitions. [2021-02-19 17:55:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:55:39,027 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 17:55:39,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:39,190 INFO L225 Difference]: With dead ends: 64631 [2021-02-19 17:55:39,190 INFO L226 Difference]: Without dead ends: 50671 [2021-02-19 17:55:39,191 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:55:39,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50671 states. [2021-02-19 17:55:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50671 to 22433. [2021-02-19 17:55:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22433 states, 22432 states have (on average 4.573511055634808) internal successors, (102593), 22432 states have internal predecessors, (102593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22433 states to 22433 states and 102593 transitions. [2021-02-19 17:55:40,026 INFO L78 Accepts]: Start accepts. Automaton has 22433 states and 102593 transitions. Word has length 30 [2021-02-19 17:55:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:40,026 INFO L480 AbstractCegarLoop]: Abstraction has 22433 states and 102593 transitions. [2021-02-19 17:55:40,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:40,026 INFO L276 IsEmpty]: Start isEmpty. Operand 22433 states and 102593 transitions. [2021-02-19 17:55:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:40,244 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:40,244 INFO L506 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, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:40,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:40,444 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:40,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:40,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1216748286, now seen corresponding path program 2 times [2021-02-19 17:55:40,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:40,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837194134] [2021-02-19 17:55:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:40,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837194134] [2021-02-19 17:55:40,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:40,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:55:40,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6545520] [2021-02-19 17:55:40,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:40,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:40,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:40,462 INFO L87 Difference]: Start difference. First operand 22433 states and 102593 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:40,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:40,633 INFO L93 Difference]: Finished difference Result 27166 states and 122184 transitions. [2021-02-19 17:55:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:55:40,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 17:55:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:40,713 INFO L225 Difference]: With dead ends: 27166 [2021-02-19 17:55:40,713 INFO L226 Difference]: Without dead ends: 26834 [2021-02-19 17:55:40,714 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26834 states. [2021-02-19 17:55:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26834 to 22633. [2021-02-19 17:55:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22633 states, 22632 states have (on average 4.55218275008837) internal successors, (103025), 22632 states have internal predecessors, (103025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22633 states to 22633 states and 103025 transitions. [2021-02-19 17:55:41,338 INFO L78 Accepts]: Start accepts. Automaton has 22633 states and 103025 transitions. Word has length 30 [2021-02-19 17:55:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:41,339 INFO L480 AbstractCegarLoop]: Abstraction has 22633 states and 103025 transitions. [2021-02-19 17:55:41,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 22633 states and 103025 transitions. [2021-02-19 17:55:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:41,385 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:41,386 INFO L506 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, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:41,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 17:55:41,386 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:41,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:41,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1338072029, now seen corresponding path program 2 times [2021-02-19 17:55:41,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:41,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498561287] [2021-02-19 17:55:41,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:41,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498561287] [2021-02-19 17:55:41,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:41,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:55:41,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144277660] [2021-02-19 17:55:41,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:41,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:41,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:41,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:41,405 INFO L87 Difference]: Start difference. First operand 22633 states and 103025 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:41,557 INFO L93 Difference]: Finished difference Result 24325 states and 108741 transitions. [2021-02-19 17:55:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:55:41,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 17:55:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:41,623 INFO L225 Difference]: With dead ends: 24325 [2021-02-19 17:55:41,624 INFO L226 Difference]: Without dead ends: 24325 [2021-02-19 17:55:41,624 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24325 states. [2021-02-19 17:55:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24325 to 21261. [2021-02-19 17:55:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21261 states, 21260 states have (on average 4.549952963311383) internal successors, (96732), 21260 states have internal predecessors, (96732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21261 states to 21261 states and 96732 transitions. [2021-02-19 17:55:42,268 INFO L78 Accepts]: Start accepts. Automaton has 21261 states and 96732 transitions. Word has length 30 [2021-02-19 17:55:42,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:42,268 INFO L480 AbstractCegarLoop]: Abstraction has 21261 states and 96732 transitions. [2021-02-19 17:55:42,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:42,268 INFO L276 IsEmpty]: Start isEmpty. Operand 21261 states and 96732 transitions. [2021-02-19 17:55:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:42,305 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:42,305 INFO L506 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, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:42,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 17:55:42,306 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:42,306 INFO L82 PathProgramCache]: Analyzing trace with hash -513263611, now seen corresponding path program 3 times [2021-02-19 17:55:42,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:42,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18265585] [2021-02-19 17:55:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:42,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18265585] [2021-02-19 17:55:42,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766020136] [2021-02-19 17:55:42,350 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 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 [2021-02-19 17:55:42,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:55:42,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:42,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 17:55:42,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:42,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:42,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-02-19 17:55:42,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940552685] [2021-02-19 17:55:42,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:55:42,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:42,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:55:42,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:55:42,426 INFO L87 Difference]: Start difference. First operand 21261 states and 96732 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:43,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:43,631 INFO L93 Difference]: Finished difference Result 67384 states and 295897 transitions. [2021-02-19 17:55:43,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 17:55:43,632 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 17:55:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:43,739 INFO L225 Difference]: With dead ends: 67384 [2021-02-19 17:55:43,740 INFO L226 Difference]: Without dead ends: 35063 [2021-02-19 17:55:43,740 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=1465, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 17:55:43,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35063 states. [2021-02-19 17:55:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35063 to 19352. [2021-02-19 17:55:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19352 states, 19351 states have (on average 4.504315022479458) internal successors, (87163), 19351 states have internal predecessors, (87163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19352 states to 19352 states and 87163 transitions. [2021-02-19 17:55:44,436 INFO L78 Accepts]: Start accepts. Automaton has 19352 states and 87163 transitions. Word has length 30 [2021-02-19 17:55:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:44,436 INFO L480 AbstractCegarLoop]: Abstraction has 19352 states and 87163 transitions. [2021-02-19 17:55:44,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:44,437 INFO L276 IsEmpty]: Start isEmpty. Operand 19352 states and 87163 transitions. [2021-02-19 17:55:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:44,471 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:44,471 INFO L506 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, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:44,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:44,672 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:44,672 INFO L82 PathProgramCache]: Analyzing trace with hash -349937079, now seen corresponding path program 3 times [2021-02-19 17:55:44,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:44,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337299719] [2021-02-19 17:55:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:44,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337299719] [2021-02-19 17:55:44,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:44,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:55:44,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137938427] [2021-02-19 17:55:44,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:44,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:44,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:44,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:55:44,703 INFO L87 Difference]: Start difference. First operand 19352 states and 87163 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:44,824 INFO L93 Difference]: Finished difference Result 20461 states and 91087 transitions. [2021-02-19 17:55:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:55:44,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 17:55:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:44,877 INFO L225 Difference]: With dead ends: 20461 [2021-02-19 17:55:44,877 INFO L226 Difference]: Without dead ends: 19957 [2021-02-19 17:55:44,877 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:44,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19957 states. [2021-02-19 17:55:45,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19957 to 18072. [2021-02-19 17:55:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18072 states, 18071 states have (on average 4.485086602844336) internal successors, (81050), 18071 states have internal predecessors, (81050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18072 states to 18072 states and 81050 transitions. [2021-02-19 17:55:45,482 INFO L78 Accepts]: Start accepts. Automaton has 18072 states and 81050 transitions. Word has length 30 [2021-02-19 17:55:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:45,482 INFO L480 AbstractCegarLoop]: Abstraction has 18072 states and 81050 transitions. [2021-02-19 17:55:45,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 18072 states and 81050 transitions. [2021-02-19 17:55:45,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:45,519 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:45,519 INFO L506 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, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:45,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-19 17:55:45,519 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:45,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1454448290, now seen corresponding path program 2 times [2021-02-19 17:55:45,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:45,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288616248] [2021-02-19 17:55:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:45,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288616248] [2021-02-19 17:55:45,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:55:45,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:55:45,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491276825] [2021-02-19 17:55:45,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:55:45,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:45,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:55:45,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:55:45,545 INFO L87 Difference]: Start difference. First operand 18072 states and 81050 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:45,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:45,715 INFO L93 Difference]: Finished difference Result 21232 states and 93393 transitions. [2021-02-19 17:55:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:55:45,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 17:55:45,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:45,772 INFO L225 Difference]: With dead ends: 21232 [2021-02-19 17:55:45,772 INFO L226 Difference]: Without dead ends: 20403 [2021-02-19 17:55:45,772 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:55:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2021-02-19 17:55:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 18470. [2021-02-19 17:55:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18470 states, 18469 states have (on average 4.4772321186853645) internal successors, (82690), 18469 states have internal predecessors, (82690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18470 states to 18470 states and 82690 transitions. [2021-02-19 17:55:46,431 INFO L78 Accepts]: Start accepts. Automaton has 18470 states and 82690 transitions. Word has length 30 [2021-02-19 17:55:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:46,431 INFO L480 AbstractCegarLoop]: Abstraction has 18470 states and 82690 transitions. [2021-02-19 17:55:46,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 18470 states and 82690 transitions. [2021-02-19 17:55:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 17:55:46,463 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:46,463 INFO L506 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, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:46,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-19 17:55:46,464 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:46,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1560801958, now seen corresponding path program 3 times [2021-02-19 17:55:46,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:46,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594785662] [2021-02-19 17:55:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:46,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594785662] [2021-02-19 17:55:46,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594061970] [2021-02-19 17:55:46,535 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 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 [2021-02-19 17:55:46,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:55:46,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:46,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 17:55:46,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:46,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-02-19 17:55:46,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-02-19 17:55:46,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738325597] [2021-02-19 17:55:46,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:55:46,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:46,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:55:46,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:55:46,615 INFO L87 Difference]: Start difference. First operand 18470 states and 82690 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:46,730 INFO L93 Difference]: Finished difference Result 19318 states and 85766 transitions. [2021-02-19 17:55:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:55:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-02-19 17:55:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:46,775 INFO L225 Difference]: With dead ends: 19318 [2021-02-19 17:55:46,776 INFO L226 Difference]: Without dead ends: 18640 [2021-02-19 17:55:46,776 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:55:46,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18640 states. [2021-02-19 17:55:47,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18640 to 13099. [2021-02-19 17:55:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13099 states, 13098 states have (on average 4.455183997556879) internal successors, (58354), 13098 states have internal predecessors, (58354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:47,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13099 states to 13099 states and 58354 transitions. [2021-02-19 17:55:47,067 INFO L78 Accepts]: Start accepts. Automaton has 13099 states and 58354 transitions. Word has length 30 [2021-02-19 17:55:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:47,067 INFO L480 AbstractCegarLoop]: Abstraction has 13099 states and 58354 transitions. [2021-02-19 17:55:47,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 13099 states and 58354 transitions. [2021-02-19 17:55:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 17:55:47,092 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:47,092 INFO L506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:47,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 17:55:47,307 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:47,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:47,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1945235696, now seen corresponding path program 1 times [2021-02-19 17:55:47,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:47,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347684120] [2021-02-19 17:55:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:55:47,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347684120] [2021-02-19 17:55:47,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364667179] [2021-02-19 17:55:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 17:55:47,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:47,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 17:55:47,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:47,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:47,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-02-19 17:55:47,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759742988] [2021-02-19 17:55:47,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:55:47,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:47,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:55:47,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:55:47,649 INFO L87 Difference]: Start difference. First operand 13099 states and 58354 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:48,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:48,295 INFO L93 Difference]: Finished difference Result 43919 states and 200632 transitions. [2021-02-19 17:55:48,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:55:48,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 17:55:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:48,364 INFO L225 Difference]: With dead ends: 43919 [2021-02-19 17:55:48,364 INFO L226 Difference]: Without dead ends: 24373 [2021-02-19 17:55:48,364 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:55:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24373 states. [2021-02-19 17:55:48,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24373 to 9122. [2021-02-19 17:55:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9122 states, 9121 states have (on average 4.517816028944194) internal successors, (41207), 9121 states have internal predecessors, (41207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 41207 transitions. [2021-02-19 17:55:48,806 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 41207 transitions. Word has length 33 [2021-02-19 17:55:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:48,807 INFO L480 AbstractCegarLoop]: Abstraction has 9122 states and 41207 transitions. [2021-02-19 17:55:48,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 9 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 41207 transitions. [2021-02-19 17:55:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 17:55:48,823 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:48,823 INFO L506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:49,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:49,038 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:49,039 INFO L82 PathProgramCache]: Analyzing trace with hash 730836858, now seen corresponding path program 1 times [2021-02-19 17:55:49,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:49,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589073503] [2021-02-19 17:55:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:55:49,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589073503] [2021-02-19 17:55:49,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881311714] [2021-02-19 17:55:49,118 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-02-19 17:55:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:49,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 17:55:49,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:49,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:49,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:49,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3] total 9 [2021-02-19 17:55:49,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581266256] [2021-02-19 17:55:49,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:55:49,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:49,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:55:49,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:55:49,221 INFO L87 Difference]: Start difference. First operand 9122 states and 41207 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:50,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:50,314 INFO L93 Difference]: Finished difference Result 33369 states and 153422 transitions. [2021-02-19 17:55:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 17:55:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-02-19 17:55:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:50,376 INFO L225 Difference]: With dead ends: 33369 [2021-02-19 17:55:50,376 INFO L226 Difference]: Without dead ends: 23102 [2021-02-19 17:55:50,378 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=661, Invalid=2531, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 17:55:50,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23102 states. [2021-02-19 17:55:50,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23102 to 9972. [2021-02-19 17:55:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9972 states, 9971 states have (on average 4.515595226155852) internal successors, (45025), 9971 states have internal predecessors, (45025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9972 states to 9972 states and 45025 transitions. [2021-02-19 17:55:50,792 INFO L78 Accepts]: Start accepts. Automaton has 9972 states and 45025 transitions. Word has length 36 [2021-02-19 17:55:50,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:50,792 INFO L480 AbstractCegarLoop]: Abstraction has 9972 states and 45025 transitions. [2021-02-19 17:55:50,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 9972 states and 45025 transitions. [2021-02-19 17:55:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:55:50,810 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:50,810 INFO L506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:51,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 17:55:51,010 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:51,011 INFO L82 PathProgramCache]: Analyzing trace with hash 479254064, now seen corresponding path program 1 times [2021-02-19 17:55:51,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:51,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426497781] [2021-02-19 17:55:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:51,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426497781] [2021-02-19 17:55:51,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941571998] [2021-02-19 17:55:51,100 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 [2021-02-19 17:55:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:51,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 17:55:51,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:51,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 11 [2021-02-19 17:55:51,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:51,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:51,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:51,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2021-02-19 17:55:51,230 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 13 treesize of output 9 [2021-02-19 17:55:51,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:51,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:51,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:51,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-02-19 17:55:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:51,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:51,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-02-19 17:55:51,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267483642] [2021-02-19 17:55:51,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:55:51,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:51,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:55:51,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:55:51,264 INFO L87 Difference]: Start difference. First operand 9972 states and 45025 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:51,622 INFO L93 Difference]: Finished difference Result 34243 states and 157744 transitions. [2021-02-19 17:55:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:55:51,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:55:51,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:51,690 INFO L225 Difference]: With dead ends: 34243 [2021-02-19 17:55:51,690 INFO L226 Difference]: Without dead ends: 24028 [2021-02-19 17:55:51,690 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:55:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24028 states. [2021-02-19 17:55:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24028 to 9804. [2021-02-19 17:55:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9804 states, 9803 states have (on average 4.534428236254208) internal successors, (44451), 9803 states have internal predecessors, (44451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9804 states to 9804 states and 44451 transitions. [2021-02-19 17:55:52,153 INFO L78 Accepts]: Start accepts. Automaton has 9804 states and 44451 transitions. Word has length 39 [2021-02-19 17:55:52,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:52,153 INFO L480 AbstractCegarLoop]: Abstraction has 9804 states and 44451 transitions. [2021-02-19 17:55:52,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:52,153 INFO L276 IsEmpty]: Start isEmpty. Operand 9804 states and 44451 transitions. [2021-02-19 17:55:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:55:52,170 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:52,170 INFO L506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:52,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 17:55:52,370 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:52,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1507071856, now seen corresponding path program 2 times [2021-02-19 17:55:52,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:52,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812515891] [2021-02-19 17:55:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:52,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812515891] [2021-02-19 17:55:52,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894795026] [2021-02-19 17:55:52,475 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 [2021-02-19 17:55:52,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:55:52,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:52,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:55:52,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:52,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 17:55:52,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:52,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:52,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:52,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-02-19 17:55:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:52,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:52,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:55:52,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559218208] [2021-02-19 17:55:52,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:55:52,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:52,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:55:52,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:55:52,627 INFO L87 Difference]: Start difference. First operand 9804 states and 44451 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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) [2021-02-19 17:55:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:52,969 INFO L93 Difference]: Finished difference Result 32096 states and 147329 transitions. [2021-02-19 17:55:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:55:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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 39 [2021-02-19 17:55:52,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:53,014 INFO L225 Difference]: With dead ends: 32096 [2021-02-19 17:55:53,014 INFO L226 Difference]: Without dead ends: 16159 [2021-02-19 17:55:53,015 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:55:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16159 states. [2021-02-19 17:55:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16159 to 9966. [2021-02-19 17:55:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 4.493828399397892) internal successors, (44781), 9965 states have internal predecessors, (44781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 44781 transitions. [2021-02-19 17:55:53,243 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 44781 transitions. Word has length 39 [2021-02-19 17:55:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:53,243 INFO L480 AbstractCegarLoop]: Abstraction has 9966 states and 44781 transitions. [2021-02-19 17:55:53,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 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) [2021-02-19 17:55:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 44781 transitions. [2021-02-19 17:55:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:55:53,260 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:53,260 INFO L506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:53,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:53,460 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1643502442, now seen corresponding path program 3 times [2021-02-19 17:55:53,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:53,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140754118] [2021-02-19 17:55:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:53,685 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-02-19 17:55:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:53,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140754118] [2021-02-19 17:55:53,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460811018] [2021-02-19 17:55:53,692 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 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 [2021-02-19 17:55:53,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:55:53,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:53,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 17:55:53,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:53,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 17:55:53,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:53,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:53,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:53,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-02-19 17:55:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:53,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:53,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:55:53,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517005880] [2021-02-19 17:55:53,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:55:53,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:53,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:55:53,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:55:53,847 INFO L87 Difference]: Start difference. First operand 9966 states and 44781 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) [2021-02-19 17:55:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:54,382 INFO L93 Difference]: Finished difference Result 38248 states and 176153 transitions. [2021-02-19 17:55:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:55:54,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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 39 [2021-02-19 17:55:54,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:54,433 INFO L225 Difference]: With dead ends: 38248 [2021-02-19 17:55:54,433 INFO L226 Difference]: Without dead ends: 19645 [2021-02-19 17:55:54,434 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:55:54,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19645 states. [2021-02-19 17:55:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19645 to 10785. [2021-02-19 17:55:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10785 states, 10784 states have (on average 4.496012611275964) internal successors, (48485), 10784 states have internal predecessors, (48485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10785 states to 10785 states and 48485 transitions. [2021-02-19 17:55:54,684 INFO L78 Accepts]: Start accepts. Automaton has 10785 states and 48485 transitions. Word has length 39 [2021-02-19 17:55:54,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:54,684 INFO L480 AbstractCegarLoop]: Abstraction has 10785 states and 48485 transitions. [2021-02-19 17:55:54,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) [2021-02-19 17:55:54,684 INFO L276 IsEmpty]: Start isEmpty. Operand 10785 states and 48485 transitions. [2021-02-19 17:55:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:55:54,702 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:54,702 INFO L506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:54,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:55:54,902 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:54,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:54,903 INFO L82 PathProgramCache]: Analyzing trace with hash -101922294, now seen corresponding path program 4 times [2021-02-19 17:55:54,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:54,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603727766] [2021-02-19 17:55:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:55,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603727766] [2021-02-19 17:55:55,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982372898] [2021-02-19 17:55:55,022 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 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 [2021-02-19 17:55:55,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:55:55,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:55,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:55:55,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:55,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 11 [2021-02-19 17:55:55,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:55,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:55,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:55,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-02-19 17:55:55,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 13 [2021-02-19 17:55:55,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:55,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:55,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:55,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-02-19 17:55:55,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 17:55:55,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:55,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:55,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:55,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-02-19 17:55:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:55,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:55,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-02-19 17:55:55,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960300552] [2021-02-19 17:55:55,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:55:55,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:55,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:55:55,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:55:55,288 INFO L87 Difference]: Start difference. First operand 10785 states and 48485 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:56,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:56,101 INFO L93 Difference]: Finished difference Result 29883 states and 135356 transitions. [2021-02-19 17:55:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:55:56,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:55:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:56,145 INFO L225 Difference]: With dead ends: 29883 [2021-02-19 17:55:56,145 INFO L226 Difference]: Without dead ends: 17348 [2021-02-19 17:55:56,146 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:55:56,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17348 states. [2021-02-19 17:55:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17348 to 11030. [2021-02-19 17:55:56,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11030 states, 11029 states have (on average 4.473569679934718) internal successors, (49339), 11029 states have internal predecessors, (49339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 49339 transitions. [2021-02-19 17:55:56,378 INFO L78 Accepts]: Start accepts. Automaton has 11030 states and 49339 transitions. Word has length 39 [2021-02-19 17:55:56,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:56,378 INFO L480 AbstractCegarLoop]: Abstraction has 11030 states and 49339 transitions. [2021-02-19 17:55:56,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:56,378 INFO L276 IsEmpty]: Start isEmpty. Operand 11030 states and 49339 transitions. [2021-02-19 17:55:56,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:55:56,396 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:56,396 INFO L506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:56,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 17:55:56,598 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:56,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:56,598 INFO L82 PathProgramCache]: Analyzing trace with hash -467726670, now seen corresponding path program 5 times [2021-02-19 17:55:56,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:56,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818952812] [2021-02-19 17:55:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:55:56,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818952812] [2021-02-19 17:55:56,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362741294] [2021-02-19 17:55:56,766 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 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 [2021-02-19 17:55:56,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:55:56,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:56,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 17:55:56,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:56,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 11 [2021-02-19 17:55:56,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:56,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:56,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:56,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-02-19 17:55:56,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-02-19 17:55:56,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:56,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:56,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:56,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-02-19 17:55:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:55:57,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:57,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-02-19 17:55:57,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921157977] [2021-02-19 17:55:57,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:55:57,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:57,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:55:57,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:55:57,024 INFO L87 Difference]: Start difference. First operand 11030 states and 49339 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:55:58,924 INFO L93 Difference]: Finished difference Result 53450 states and 243228 transitions. [2021-02-19 17:55:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 17:55:58,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:55:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:55:58,991 INFO L225 Difference]: With dead ends: 53450 [2021-02-19 17:55:58,991 INFO L226 Difference]: Without dead ends: 23918 [2021-02-19 17:55:58,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 17:55:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23918 states. [2021-02-19 17:55:59,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23918 to 11491. [2021-02-19 17:55:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11490 states have (on average 4.465883376849434) internal successors, (51313), 11490 states have internal predecessors, (51313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 51313 transitions. [2021-02-19 17:55:59,277 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 51313 transitions. Word has length 39 [2021-02-19 17:55:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:55:59,277 INFO L480 AbstractCegarLoop]: Abstraction has 11491 states and 51313 transitions. [2021-02-19 17:55:59,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:55:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 51313 transitions. [2021-02-19 17:55:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 17:55:59,295 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:55:59,295 INFO L506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:55:59,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 17:55:59,496 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:55:59,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:55:59,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1976330924, now seen corresponding path program 6 times [2021-02-19 17:55:59,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:55:59,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804225551] [2021-02-19 17:55:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:55:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:55:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:59,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804225551] [2021-02-19 17:55:59,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411164218] [2021-02-19 17:55:59,581 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 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 [2021-02-19 17:55:59,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:55:59,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:55:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 17:55:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:55:59,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 11 [2021-02-19 17:55:59,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:59,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:59,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:59,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-02-19 17:55:59,691 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 13 treesize of output 9 [2021-02-19 17:55:59,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 17:55:59,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 17:55:59,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 17:55:59,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-02-19 17:55:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:55:59,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:55:59,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 17:55:59,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958987277] [2021-02-19 17:55:59,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:55:59,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:55:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:55:59,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:55:59,717 INFO L87 Difference]: Start difference. First operand 11491 states and 51313 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:00,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:56:00,172 INFO L93 Difference]: Finished difference Result 31654 states and 142983 transitions. [2021-02-19 17:56:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:56:00,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 17:56:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:56:00,221 INFO L225 Difference]: With dead ends: 31654 [2021-02-19 17:56:00,221 INFO L226 Difference]: Without dead ends: 19293 [2021-02-19 17:56:00,221 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:56:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19293 states. [2021-02-19 17:56:00,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19293 to 11315. [2021-02-19 17:56:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11315 states, 11314 states have (on average 4.472246773908432) internal successors, (50599), 11314 states have internal predecessors, (50599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11315 states to 11315 states and 50599 transitions. [2021-02-19 17:56:00,476 INFO L78 Accepts]: Start accepts. Automaton has 11315 states and 50599 transitions. Word has length 39 [2021-02-19 17:56:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:56:00,476 INFO L480 AbstractCegarLoop]: Abstraction has 11315 states and 50599 transitions. [2021-02-19 17:56:00,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand 11315 states and 50599 transitions. [2021-02-19 17:56:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:56:00,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:56:00,496 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:56:00,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 17:56:00,699 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:56:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:56:00,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1665062351, now seen corresponding path program 7 times [2021-02-19 17:56:00,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:56:00,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203696331] [2021-02-19 17:56:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:56:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:56:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:56:00,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203696331] [2021-02-19 17:56:00,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608797605] [2021-02-19 17:56:00,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 17:56:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:56:00,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:56:00,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:56:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:56:00,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:56:00,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:56:00,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799799705] [2021-02-19 17:56:00,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:56:00,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:56:00,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:56:00,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:56:00,809 INFO L87 Difference]: Start difference. First operand 11315 states and 50599 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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) [2021-02-19 17:56:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:56:01,011 INFO L93 Difference]: Finished difference Result 24589 states and 110955 transitions. [2021-02-19 17:56:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:56:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 42 [2021-02-19 17:56:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:56:01,083 INFO L225 Difference]: With dead ends: 24589 [2021-02-19 17:56:01,083 INFO L226 Difference]: Without dead ends: 24453 [2021-02-19 17:56:01,083 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:56:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24453 states. [2021-02-19 17:56:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24453 to 17865. [2021-02-19 17:56:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17865 states, 17864 states have (on average 4.617163009404389) internal successors, (82481), 17864 states have internal predecessors, (82481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17865 states to 17865 states and 82481 transitions. [2021-02-19 17:56:01,590 INFO L78 Accepts]: Start accepts. Automaton has 17865 states and 82481 transitions. Word has length 42 [2021-02-19 17:56:01,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:56:01,591 INFO L480 AbstractCegarLoop]: Abstraction has 17865 states and 82481 transitions. [2021-02-19 17:56:01,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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) [2021-02-19 17:56:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 17865 states and 82481 transitions. [2021-02-19 17:56:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:56:01,622 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:56:01,622 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:56:01,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:56:01,823 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:56:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:56:01,823 INFO L82 PathProgramCache]: Analyzing trace with hash 433798583, now seen corresponding path program 8 times [2021-02-19 17:56:01,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:56:01,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312855809] [2021-02-19 17:56:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:56:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:56:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:56:01,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312855809] [2021-02-19 17:56:01,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380023554] [2021-02-19 17:56:01,845 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 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 [2021-02-19 17:56:01,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:56:01,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:56:01,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:56:01,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:56:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:56:01,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:56:01,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 17:56:01,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36434700] [2021-02-19 17:56:01,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:56:01,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:56:01,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:56:01,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:56:01,937 INFO L87 Difference]: Start difference. First operand 17865 states and 82481 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:56:02,796 INFO L93 Difference]: Finished difference Result 72505 states and 323180 transitions. [2021-02-19 17:56:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 17:56:02,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:56:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:56:03,019 INFO L225 Difference]: With dead ends: 72505 [2021-02-19 17:56:03,019 INFO L226 Difference]: Without dead ends: 72505 [2021-02-19 17:56:03,020 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 17:56:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72505 states. [2021-02-19 17:56:04,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72505 to 32375. [2021-02-19 17:56:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32375 states, 32374 states have (on average 4.726200037066782) internal successors, (153006), 32374 states have internal predecessors, (153006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32375 states to 32375 states and 153006 transitions. [2021-02-19 17:56:04,209 INFO L78 Accepts]: Start accepts. Automaton has 32375 states and 153006 transitions. Word has length 42 [2021-02-19 17:56:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:56:04,209 INFO L480 AbstractCegarLoop]: Abstraction has 32375 states and 153006 transitions. [2021-02-19 17:56:04,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 32375 states and 153006 transitions. [2021-02-19 17:56:04,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:56:04,274 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:56:04,274 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:56:04,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:56:04,475 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:56:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:56:04,475 INFO L82 PathProgramCache]: Analyzing trace with hash -876634677, now seen corresponding path program 9 times [2021-02-19 17:56:04,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:56:04,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004667046] [2021-02-19 17:56:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:56:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:56:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:56:04,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004667046] [2021-02-19 17:56:04,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687540078] [2021-02-19 17:56:04,501 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 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 [2021-02-19 17:56:04,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:56:04,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:56:04,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:56:04,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:56:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:56:04,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:56:04,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 17:56:04,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92343271] [2021-02-19 17:56:04,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:56:04,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:56:04,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:56:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:56:04,599 INFO L87 Difference]: Start difference. First operand 32375 states and 153006 transitions. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:56:05,788 INFO L93 Difference]: Finished difference Result 105844 states and 506959 transitions. [2021-02-19 17:56:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:56:05,788 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:56:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:56:06,194 INFO L225 Difference]: With dead ends: 105844 [2021-02-19 17:56:06,194 INFO L226 Difference]: Without dead ends: 105734 [2021-02-19 17:56:06,194 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:56:06,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105734 states. [2021-02-19 17:56:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105734 to 71666. [2021-02-19 17:56:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71666 states, 71665 states have (on average 4.997027837856694) internal successors, (358112), 71665 states have internal predecessors, (358112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71666 states to 71666 states and 358112 transitions. [2021-02-19 17:56:08,464 INFO L78 Accepts]: Start accepts. Automaton has 71666 states and 358112 transitions. Word has length 42 [2021-02-19 17:56:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:56:08,465 INFO L480 AbstractCegarLoop]: Abstraction has 71666 states and 358112 transitions. [2021-02-19 17:56:08,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:08,465 INFO L276 IsEmpty]: Start isEmpty. Operand 71666 states and 358112 transitions. [2021-02-19 17:56:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:56:08,648 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:56:08,648 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:56:08,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:56:08,848 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:56:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:56:08,849 INFO L82 PathProgramCache]: Analyzing trace with hash 7004202, now seen corresponding path program 10 times [2021-02-19 17:56:08,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:56:08,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661216592] [2021-02-19 17:56:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:56:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:56:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:56:08,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661216592] [2021-02-19 17:56:08,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988118495] [2021-02-19 17:56:08,888 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:56:08,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:56:08,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:56:08,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:56:08,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:56:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:56:08,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:56:08,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-02-19 17:56:08,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550235535] [2021-02-19 17:56:08,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:56:08,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:56:08,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:56:08,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:56:08,982 INFO L87 Difference]: Start difference. First operand 71666 states and 358112 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:56:10,335 INFO L93 Difference]: Finished difference Result 175535 states and 883417 transitions. [2021-02-19 17:56:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:56:10,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:56:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:56:11,045 INFO L225 Difference]: With dead ends: 175535 [2021-02-19 17:56:11,045 INFO L226 Difference]: Without dead ends: 170010 [2021-02-19 17:56:11,045 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:56:11,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170010 states. [2021-02-19 17:56:14,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170010 to 141071. [2021-02-19 17:56:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141071 states, 141070 states have (on average 5.143864747997448) internal successors, (725645), 141070 states have internal predecessors, (725645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141071 states to 141071 states and 725645 transitions. [2021-02-19 17:56:15,453 INFO L78 Accepts]: Start accepts. Automaton has 141071 states and 725645 transitions. Word has length 42 [2021-02-19 17:56:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:56:15,453 INFO L480 AbstractCegarLoop]: Abstraction has 141071 states and 725645 transitions. [2021-02-19 17:56:15,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 141071 states and 725645 transitions. [2021-02-19 17:56:15,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 17:56:15,869 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:56:15,869 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:56:16,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-02-19 17:56:16,070 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:56:16,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:56:16,070 INFO L82 PathProgramCache]: Analyzing trace with hash 982625292, now seen corresponding path program 11 times [2021-02-19 17:56:16,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:56:16,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453891575] [2021-02-19 17:56:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:56:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:56:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:56:16,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453891575] [2021-02-19 17:56:16,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901724593] [2021-02-19 17:56:16,104 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 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 [2021-02-19 17:56:16,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:56:16,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:56:16,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:56:16,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:56:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:56:16,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:56:16,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-02-19 17:56:16,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466785541] [2021-02-19 17:56:16,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:56:16,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:56:16,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:56:16,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:56:16,253 INFO L87 Difference]: Start difference. First operand 141071 states and 725645 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:56:22,826 INFO L93 Difference]: Finished difference Result 359891 states and 1835814 transitions. [2021-02-19 17:56:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:56:22,826 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 17:56:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:56:24,945 INFO L225 Difference]: With dead ends: 359891 [2021-02-19 17:56:24,946 INFO L226 Difference]: Without dead ends: 353037 [2021-02-19 17:56:24,946 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:56:25,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353037 states. [2021-02-19 17:56:33,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353037 to 262871. [2021-02-19 17:56:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262871 states, 262870 states have (on average 5.252634382013923) internal successors, (1380760), 262870 states have internal predecessors, (1380760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262871 states to 262871 states and 1380760 transitions. [2021-02-19 17:56:35,441 INFO L78 Accepts]: Start accepts. Automaton has 262871 states and 1380760 transitions. Word has length 42 [2021-02-19 17:56:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:56:35,441 INFO L480 AbstractCegarLoop]: Abstraction has 262871 states and 1380760 transitions. [2021-02-19 17:56:35,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 262871 states and 1380760 transitions. [2021-02-19 17:56:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-19 17:56:37,317 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:56:37,318 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:56:37,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 17:56:37,532 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-02-19 17:56:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:56:37,532 INFO L82 PathProgramCache]: Analyzing trace with hash -803347340, now seen corresponding path program 12 times [2021-02-19 17:56:37,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:56:37,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893465236] [2021-02-19 17:56:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:56:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:56:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-02-19 17:56:37,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893465236] [2021-02-19 17:56:37,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641337511] [2021-02-19 17:56:37,589 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:56:37,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:56:37,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:56:37,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 17:56:37,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:56:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:56:37,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:56:37,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-02-19 17:56:37,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617101212] [2021-02-19 17:56:37,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:56:37,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:56:37,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:56:37,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:56:37,707 INFO L87 Difference]: Start difference. First operand 262871 states and 1380760 transitions. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:56:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:56:46,284 INFO L93 Difference]: Finished difference Result 674569 states and 3456412 transitions. [2021-02-19 17:56:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 17:56:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-02-19 17:56:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:56:50,322 INFO L225 Difference]: With dead ends: 674569 [2021-02-19 17:56:50,322 INFO L226 Difference]: Without dead ends: 663440 [2021-02-19 17:56:50,323 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=521, Invalid=1831, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 17:56:51,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663440 states.