/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:16:00,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:16:00,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:16:00,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:16:00,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 21:16:00,526 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:16:00,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:16:00,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:16:00,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:16:00,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:16:00,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:16:00,528 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:16:00,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:16:00,529 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:16:00,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:16:00,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:16:00,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:16:00,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:16:00,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:16:00,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:16:00,530 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:16:00,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:16:00,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:16:00,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:16:00,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:16:00,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:16:00,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:16:00,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:16:00,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:16:00,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:16:00,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:16:00,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:16:00,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:16:00,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:16:00,532 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:16:00,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:16:00,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:16:00,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:16:00,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:16:00,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:16:00,876 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:16:00,877 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:16:00,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl [2021-05-21 21:16:00,879 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl' [2021-05-21 21:16:00,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:16:00,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:16:00,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:16:00,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:16:00,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:16:00,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:16:00" (1/1) ... [2021-05-21 21:16:00,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:16:00" (1/1) ... [2021-05-21 21:16:00,959 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:16:00,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:16:00,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:16:00,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:16:00,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:16:00" (1/1) ... [2021-05-21 21:16:00,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:16:00" (1/1) ... [2021-05-21 21:16:00,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:16:00" (1/1) ... [2021-05-21 21:16:00,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:16:00" (1/1) ... [2021-05-21 21:16:00,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:16:00" (1/1) ... [2021-05-21 21:16:00,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:16:00" (1/1) ... [2021-05-21 21:16:00,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:16:00" (1/1) ... [2021-05-21 21:16:00,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:16:00,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:16:00,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:16:00,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:16:00,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:16:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:16:01,050 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:16:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:16:01,050 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:16:01,050 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:16:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:16:01,050 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:16:01,051 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:16:01,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:16:01,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:16:01,051 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 21:16:01,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 21:16:01,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 21:16:01,052 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:16:01,292 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:16:01,292 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:16:01,294 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:16:01 BoogieIcfgContainer [2021-05-21 21:16:01,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:16:01,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:16:01,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:16:01,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:16:01,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:16:00" (1/2) ... [2021-05-21 21:16:01,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5499ca41 and model type ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:16:01, skipping insertion in model container [2021-05-21 21:16:01,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:16:01" (2/2) ... [2021-05-21 21:16:01,299 INFO L111 eAbstractionObserver]: Analyzing ICFG ring.wvr.bpl [2021-05-21 21:16:01,303 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:16:01,303 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:16:01,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:16:01,304 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:16:01,351 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 21:16:01,369 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 21:16:01,384 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:16:01,384 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:16:01,384 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:16:01,384 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:16:01,384 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:16:01,384 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:16:01,385 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:16:01,385 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:16:01,400 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-05-21 21:16:01,481 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:01,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 21:16:01,509 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:01,509 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:01,510 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:01,520 INFO L82 PathProgramCache]: Analyzing trace with hash 425333675, now seen corresponding path program 1 times [2021-05-21 21:16:01,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:01,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816405216] [2021-05-21 21:16:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:01,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:01,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816405216] [2021-05-21 21:16:01,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816405216] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:16:01,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:16:01,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 21:16:01,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539616884] [2021-05-21 21:16:01,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:16:01,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:01,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:16:01,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:16:01,686 INFO L87 Difference]: Start difference. First operand has 1007 states, 1005 states have (on average 2.973134328358209) internal successors, (2988), 1006 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:01,747 INFO L93 Difference]: Finished difference Result 1114 states and 3313 transitions. [2021-05-21 21:16:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:16:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 21:16:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:01,773 INFO L225 Difference]: With dead ends: 1114 [2021-05-21 21:16:01,774 INFO L226 Difference]: Without dead ends: 1114 [2021-05-21 21:16:01,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:16:01,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-05-21 21:16:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-05-21 21:16:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.976639712488769) internal successors, (3313), 1113 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3313 transitions. [2021-05-21 21:16:01,892 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3313 transitions. Word has length 22 [2021-05-21 21:16:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:01,893 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 3313 transitions. [2021-05-21 21:16:01,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:01,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3313 transitions. [2021-05-21 21:16:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:16:01,897 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:01,897 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:01,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:16:01,899 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:01,902 INFO L82 PathProgramCache]: Analyzing trace with hash -765277692, now seen corresponding path program 1 times [2021-05-21 21:16:01,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:01,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742527681] [2021-05-21 21:16:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:01,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:01,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742527681] [2021-05-21 21:16:01,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742527681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:16:01,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:16:01,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 21:16:01,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085464049] [2021-05-21 21:16:01,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:16:01,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:01,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:16:01,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:16:01,969 INFO L87 Difference]: Start difference. First operand 1114 states and 3313 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 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) [2021-05-21 21:16:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:01,984 INFO L93 Difference]: Finished difference Result 1117 states and 3310 transitions. [2021-05-21 21:16:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:16:01,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 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 [2021-05-21 21:16:01,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:01,990 INFO L225 Difference]: With dead ends: 1117 [2021-05-21 21:16:01,990 INFO L226 Difference]: Without dead ends: 1117 [2021-05-21 21:16:01,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:16:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-05-21 21:16:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2021-05-21 21:16:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 2.9659498207885306) internal successors, (3310), 1116 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3310 transitions. [2021-05-21 21:16:02,026 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3310 transitions. Word has length 27 [2021-05-21 21:16:02,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:02,026 INFO L482 AbstractCegarLoop]: Abstraction has 1117 states and 3310 transitions. [2021-05-21 21:16:02,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 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) [2021-05-21 21:16:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3310 transitions. [2021-05-21 21:16:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:16:02,032 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:02,032 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:02,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 21:16:02,033 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:02,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash 562503080, now seen corresponding path program 2 times [2021-05-21 21:16:02,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:02,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734912524] [2021-05-21 21:16:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:16:02,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:02,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734912524] [2021-05-21 21:16:02,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734912524] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:16:02,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:16:02,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 21:16:02,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814716960] [2021-05-21 21:16:02,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:16:02,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:02,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:16:02,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:16:02,082 INFO L87 Difference]: Start difference. First operand 1117 states and 3310 transitions. Second operand has 3 states, 3 states have (on average 9.0) 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) [2021-05-21 21:16:02,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:02,111 INFO L93 Difference]: Finished difference Result 1228 states and 3641 transitions. [2021-05-21 21:16:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:16:02,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) 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 [2021-05-21 21:16:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:02,119 INFO L225 Difference]: With dead ends: 1228 [2021-05-21 21:16:02,122 INFO L226 Difference]: Without dead ends: 1228 [2021-05-21 21:16:02,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:16:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-05-21 21:16:02,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1228. [2021-05-21 21:16:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.967400162999185) internal successors, (3641), 1227 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3641 transitions. [2021-05-21 21:16:02,166 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3641 transitions. Word has length 27 [2021-05-21 21:16:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:02,166 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3641 transitions. [2021-05-21 21:16:02,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) 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) [2021-05-21 21:16:02,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3641 transitions. [2021-05-21 21:16:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:16:02,170 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:02,170 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:02,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 21:16:02,170 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:02,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:02,172 INFO L82 PathProgramCache]: Analyzing trace with hash 630436378, now seen corresponding path program 1 times [2021-05-21 21:16:02,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:02,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778366244] [2021-05-21 21:16:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:02,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:16:02,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:02,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778366244] [2021-05-21 21:16:02,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778366244] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:16:02,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:16:02,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 21:16:02,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468018717] [2021-05-21 21:16:02,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:16:02,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:02,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:16:02,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:16:02,208 INFO L87 Difference]: Start difference. First operand 1228 states and 3641 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:02,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:02,224 INFO L93 Difference]: Finished difference Result 1783 states and 5179 transitions. [2021-05-21 21:16:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:16:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:16:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:02,231 INFO L225 Difference]: With dead ends: 1783 [2021-05-21 21:16:02,231 INFO L226 Difference]: Without dead ends: 1405 [2021-05-21 21:16:02,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:16:02,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-05-21 21:16:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 1183. [2021-05-21 21:16:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.9382402707275803) internal successors, (3473), 1182 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3473 transitions. [2021-05-21 21:16:02,267 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3473 transitions. Word has length 32 [2021-05-21 21:16:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:02,267 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3473 transitions. [2021-05-21 21:16:02,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3473 transitions. [2021-05-21 21:16:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:16:02,272 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:02,272 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:02,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 21:16:02,273 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:02,273 INFO L82 PathProgramCache]: Analyzing trace with hash -321367481, now seen corresponding path program 1 times [2021-05-21 21:16:02,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:02,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067938414] [2021-05-21 21:16:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:16:02,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:02,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067938414] [2021-05-21 21:16:02,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067938414] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:16:02,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:16:02,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 21:16:02,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146562185] [2021-05-21 21:16:02,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:16:02,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:02,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:16:02,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:16:02,311 INFO L87 Difference]: Start difference. First operand 1183 states and 3473 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:02,329 INFO L93 Difference]: Finished difference Result 915 states and 2610 transitions. [2021-05-21 21:16:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:16:02,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 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 37 [2021-05-21 21:16:02,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:02,338 INFO L225 Difference]: With dead ends: 915 [2021-05-21 21:16:02,338 INFO L226 Difference]: Without dead ends: 915 [2021-05-21 21:16:02,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:16:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-05-21 21:16:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 915. [2021-05-21 21:16:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.8555798687089715) internal successors, (2610), 914 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2610 transitions. [2021-05-21 21:16:02,365 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2610 transitions. Word has length 37 [2021-05-21 21:16:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:02,365 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2610 transitions. [2021-05-21 21:16:02,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2610 transitions. [2021-05-21 21:16:02,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:16:02,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:02,368 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:02,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 21:16:02,368 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:02,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:02,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1106779099, now seen corresponding path program 2 times [2021-05-21 21:16:02,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:02,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473316020] [2021-05-21 21:16:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:16:02,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:02,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473316020] [2021-05-21 21:16:02,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473316020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:02,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046894284] [2021-05-21 21:16:02,418 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:02,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:16:02,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-21 21:16:02,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:02,665 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 [2021-05-21 21:16:02,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:16:02,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:16:02,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:16:02,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-05-21 21:16:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:16:02,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046894284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:02,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:02,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 21:16:02,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117130066] [2021-05-21 21:16:02,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:16:02,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:02,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:16:02,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:16:02,766 INFO L87 Difference]: Start difference. First operand 915 states and 2610 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:02,857 INFO L93 Difference]: Finished difference Result 1329 states and 3816 transitions. [2021-05-21 21:16:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:16:02,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:16:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:02,864 INFO L225 Difference]: With dead ends: 1329 [2021-05-21 21:16:02,864 INFO L226 Difference]: Without dead ends: 1329 [2021-05-21 21:16:02,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:16:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-05-21 21:16:02,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1260. [2021-05-21 21:16:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.871326449563145) internal successors, (3615), 1259 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 3615 transitions. [2021-05-21 21:16:02,904 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 3615 transitions. Word has length 37 [2021-05-21 21:16:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:02,905 INFO L482 AbstractCegarLoop]: Abstraction has 1260 states and 3615 transitions. [2021-05-21 21:16:02,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 3615 transitions. [2021-05-21 21:16:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 21:16:02,909 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:02,910 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 21:16:03,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-21 21:16:03,125 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:03,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1059420440, now seen corresponding path program 3 times [2021-05-21 21:16:03,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:03,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544941640] [2021-05-21 21:16:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:16:03,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:03,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544941640] [2021-05-21 21:16:03,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544941640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:03,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091638987] [2021-05-21 21:16:03,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:16:03,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:16:03,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:03,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:16:03,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:16:03,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091638987] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:16:03,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 21:16:03,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-05-21 21:16:03,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820202412] [2021-05-21 21:16:03,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 21:16:03,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:03,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 21:16:03,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:16:03,399 INFO L87 Difference]: Start difference. First operand 1260 states and 3615 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:03,429 INFO L93 Difference]: Finished difference Result 2714 states and 7974 transitions. [2021-05-21 21:16:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 21:16:03,429 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-21 21:16:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:03,441 INFO L225 Difference]: With dead ends: 2714 [2021-05-21 21:16:03,442 INFO L226 Difference]: Without dead ends: 2693 [2021-05-21 21:16:03,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:16:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-05-21 21:16:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 2421. [2021-05-21 21:16:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 2.997520661157025) internal successors, (7254), 2420 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 7254 transitions. [2021-05-21 21:16:03,511 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 7254 transitions. Word has length 42 [2021-05-21 21:16:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:03,511 INFO L482 AbstractCegarLoop]: Abstraction has 2421 states and 7254 transitions. [2021-05-21 21:16:03,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:03,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 7254 transitions. [2021-05-21 21:16:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 21:16:03,517 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:03,518 INFO L521 BasicCegarLoop]: trace histogram [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] [2021-05-21 21:16:03,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:03,741 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:03,741 INFO L82 PathProgramCache]: Analyzing trace with hash 41400296, now seen corresponding path program 4 times [2021-05-21 21:16:03,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:03,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046356030] [2021-05-21 21:16:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:03,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:03,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046356030] [2021-05-21 21:16:03,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046356030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:03,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260920620] [2021-05-21 21:16:03,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:03,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:16:03,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:03,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:16:03,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:03,934 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 [2021-05-21 21:16:03,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:16:03,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:16:03,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:16:03,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-05-21 21:16:03,975 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 [2021-05-21 21:16:03,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:16:03,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:16:03,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:16:03,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-05-21 21:16:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:04,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260920620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:04,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:04,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-05-21 21:16:04,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041405388] [2021-05-21 21:16:04,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:16:04,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:16:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:16:04,009 INFO L87 Difference]: Start difference. First operand 2421 states and 7254 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:04,184 INFO L93 Difference]: Finished difference Result 2592 states and 7796 transitions. [2021-05-21 21:16:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:16:04,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-21 21:16:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:04,196 INFO L225 Difference]: With dead ends: 2592 [2021-05-21 21:16:04,196 INFO L226 Difference]: Without dead ends: 2592 [2021-05-21 21:16:04,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:16:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-05-21 21:16:04,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2369. [2021-05-21 21:16:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 3.00464527027027) internal successors, (7115), 2368 states have internal predecessors, (7115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 7115 transitions. [2021-05-21 21:16:04,290 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 7115 transitions. Word has length 42 [2021-05-21 21:16:04,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:04,291 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 7115 transitions. [2021-05-21 21:16:04,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:04,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 7115 transitions. [2021-05-21 21:16:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:16:04,296 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:04,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-05-21 21:16:04,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:04,519 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:04,519 INFO L82 PathProgramCache]: Analyzing trace with hash 2037460374, now seen corresponding path program 5 times [2021-05-21 21:16:04,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:04,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257130053] [2021-05-21 21:16:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:04,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:04,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257130053] [2021-05-21 21:16:04,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257130053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:04,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639602838] [2021-05-21 21:16:04,573 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:04,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:16:04,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:04,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:16:04,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:16:04,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639602838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:04,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:04,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-05-21 21:16:04,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905456854] [2021-05-21 21:16:04,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:16:04,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:04,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:16:04,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:16:04,705 INFO L87 Difference]: Start difference. First operand 2369 states and 7115 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 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) [2021-05-21 21:16:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:04,737 INFO L93 Difference]: Finished difference Result 4663 states and 13882 transitions. [2021-05-21 21:16:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 21:16:04,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 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 47 [2021-05-21 21:16:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:04,758 INFO L225 Difference]: With dead ends: 4663 [2021-05-21 21:16:04,758 INFO L226 Difference]: Without dead ends: 4635 [2021-05-21 21:16:04,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:16:04,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-05-21 21:16:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 3953. [2021-05-21 21:16:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 3.0587044534412957) internal successors, (12088), 3952 states have internal predecessors, (12088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 12088 transitions. [2021-05-21 21:16:04,867 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 12088 transitions. Word has length 47 [2021-05-21 21:16:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:04,868 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 12088 transitions. [2021-05-21 21:16:04,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 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) [2021-05-21 21:16:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 12088 transitions. [2021-05-21 21:16:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:16:04,875 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:04,875 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-05-21 21:16:05,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:05,099 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash 31320406, now seen corresponding path program 6 times [2021-05-21 21:16:05,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:05,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241866123] [2021-05-21 21:16:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:05,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:05,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241866123] [2021-05-21 21:16:05,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241866123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:05,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202689080] [2021-05-21 21:16:05,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:05,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:16:05,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:05,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:16:05,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:05,482 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 [2021-05-21 21:16:05,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:16:05,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:16:05,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:16:05,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-05-21 21:16:05,569 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 [2021-05-21 21:16:05,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:16:05,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:16:05,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:16:05,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-05-21 21:16:05,623 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-21 21:16:05,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 21:16:05,833 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-21 21:16:05,835 INFO L168 Benchmark]: Toolchain (without parser) took 4903.00 ms. Allocated memory is still 385.9 MB. Free memory was 364.7 MB in the beginning and 146.9 MB in the end (delta: 217.9 MB). Peak memory consumption was 219.5 MB. Max. memory is 16.0 GB. [2021-05-21 21:16:05,835 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 385.9 MB. Free memory was 366.0 MB in the beginning and 365.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:16:05,835 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.22 ms. Allocated memory is still 385.9 MB. Free memory was 364.7 MB in the beginning and 363.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:16:05,835 INFO L168 Benchmark]: Boogie Preprocessor took 29.50 ms. Allocated memory is still 385.9 MB. Free memory was 363.2 MB in the beginning and 362.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:16:05,836 INFO L168 Benchmark]: RCFGBuilder took 302.55 ms. Allocated memory is still 385.9 MB. Free memory was 362.1 MB in the beginning and 370.5 MB in the end (delta: -8.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-05-21 21:16:05,836 INFO L168 Benchmark]: TraceAbstraction took 4539.89 ms. Allocated memory is still 385.9 MB. Free memory was 370.5 MB in the beginning and 146.9 MB in the end (delta: 223.6 MB). Peak memory consumption was 223.6 MB. Max. memory is 16.0 GB. [2021-05-21 21:16:05,836 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 385.9 MB. Free memory was 366.0 MB in the beginning and 365.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.22 ms. Allocated memory is still 385.9 MB. Free memory was 364.7 MB in the beginning and 363.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.50 ms. Allocated memory is still 385.9 MB. Free memory was 363.2 MB in the beginning and 362.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 302.55 ms. Allocated memory is still 385.9 MB. Free memory was 362.1 MB in the beginning and 370.5 MB in the end (delta: -8.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4539.89 ms. Allocated memory is still 385.9 MB. Free memory was 370.5 MB in the beginning and 146.9 MB in the end (delta: 223.6 MB). Peak memory consumption was 223.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...