/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:20:55,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:20:55,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:20:55,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:20:55,919 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:20:55,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:20:55,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:20:55,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:20:55,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:20:55,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:20:55,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:20:55,951 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:20:55,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:20:55,951 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:20:55,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:20:55,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:20:55,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:20:55,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:20:55,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:20:55,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:20:55,952 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:20:55,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:20:55,952 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:20:55,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:20:55,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:20:55,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:20:55,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:20:55,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:20:55,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:20:55,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:20:55,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:20:55,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:20:55,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:20:55,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:20:55,954 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:20:55,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:20:55,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:20:56,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:20:56,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:20:56,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:20:56,253 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:20:56,257 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:20:56,257 INFO L432 ainManager$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 [2021-07-13 20:20:56,257 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/ring.wvr.bpl' [2021-07-13 20:20:56,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:20:56,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:20:56,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:20:56,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:20:56,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:20:56,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:20:56" (1/1) ... [2021-07-13 20:20:56,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:20:56" (1/1) ... [2021-07-13 20:20:56,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:20:56,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:20:56,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:20:56,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:20:56,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:20:56" (1/1) ... [2021-07-13 20:20:56,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:20:56" (1/1) ... [2021-07-13 20:20:56,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:20:56" (1/1) ... [2021-07-13 20:20:56,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:20:56" (1/1) ... [2021-07-13 20:20:56,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:20:56" (1/1) ... [2021-07-13 20:20:56,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:20:56" (1/1) ... [2021-07-13 20:20:56,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:20:56" (1/1) ... [2021-07-13 20:20:56,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:20:56,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:20:56,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:20:56,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:20:56,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:20:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:20:56,423 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:20:56,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:20:56,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:20:56,423 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:20:56,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:20:56,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:20:56,424 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:20:56,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:20:56,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:20:56,424 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:20:56,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:20:56,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:20:56,425 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:20:56,594 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:20:56,594 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:20:56,596 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:20:56 BoogieIcfgContainer [2021-07-13 20:20:56,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:20:56,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:20:56,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:20:56,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:20:56,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:20:56" (1/2) ... [2021-07-13 20:20:56,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a788b0 and model type ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:20:56, skipping insertion in model container [2021-07-13 20:20:56,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:20:56" (2/2) ... [2021-07-13 20:20:56,600 INFO L111 eAbstractionObserver]: Analyzing ICFG ring.wvr.bpl [2021-07-13 20:20:56,604 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:20:56,604 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:20:56,604 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:20:56,616 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:20:56,671 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:20:56,687 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:20:56,721 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:20:56,721 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:20:56,721 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:20:56,721 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:20:56,721 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:20:56,721 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:20:56,721 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:20:56,727 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:20:56,738 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-07-13 20:20:56,802 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1005 states, 1004 states have (on average 2.9741035856573705) internal successors, (2986), 1004 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 1005 states, 1004 states have (on average 2.9741035856573705) internal successors, (2986), 1004 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:56,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:20:56,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:56,828 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:56,828 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:56,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1066544925, now seen corresponding path program 1 times [2021-07-13 20:20:56,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:56,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555369312] [2021-07-13 20:20:56,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:56,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:56,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555369312] [2021-07-13 20:20:56,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555369312] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:20:56,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:20:56,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:20:56,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132935371] [2021-07-13 20:20:56,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:20:56,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:56,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:20:56,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:56,954 INFO L87 Difference]: Start difference. First operand has 1005 states, 1004 states have (on average 2.9741035856573705) internal successors, (2986), 1004 states have internal predecessors, (2986), 0 states have call successors, (0), 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) [2021-07-13 20:20:56,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:56,989 INFO L93 Difference]: Finished difference Result 1114 states and 3313 transitions. [2021-07-13 20:20:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:20:56,991 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 [2021-07-13 20:20:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:57,007 INFO L225 Difference]: With dead ends: 1114 [2021-07-13 20:20:57,008 INFO L226 Difference]: Without dead ends: 1114 [2021-07-13 20:20:57,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-07-13 20:20:57,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2021-07-13 20:20:57,093 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) [2021-07-13 20:20:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3313 transitions. [2021-07-13 20:20:57,100 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3313 transitions. Word has length 22 [2021-07-13 20:20:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:57,100 INFO L482 AbstractCegarLoop]: Abstraction has 1114 states and 3313 transitions. [2021-07-13 20:20:57,100 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) [2021-07-13 20:20:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3313 transitions. [2021-07-13 20:20:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:20:57,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:57,106 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:57,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:20:57,107 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1562502986, now seen corresponding path program 1 times [2021-07-13 20:20:57,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:57,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193991212] [2021-07-13 20:20:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:57,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:57,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193991212] [2021-07-13 20:20:57,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193991212] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:20:57,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:20:57,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:20:57,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413959767] [2021-07-13 20:20:57,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:20:57,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:57,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:20:57,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:57,172 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) [2021-07-13 20:20:57,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:57,194 INFO L93 Difference]: Finished difference Result 1117 states and 3310 transitions. [2021-07-13 20:20:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:20:57,194 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 [2021-07-13 20:20:57,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:57,221 INFO L225 Difference]: With dead ends: 1117 [2021-07-13 20:20:57,221 INFO L226 Difference]: Without dead ends: 1117 [2021-07-13 20:20:57,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-07-13 20:20:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2021-07-13 20:20:57,261 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) [2021-07-13 20:20:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 3310 transitions. [2021-07-13 20:20:57,265 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 3310 transitions. Word has length 27 [2021-07-13 20:20:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:57,265 INFO L482 AbstractCegarLoop]: Abstraction has 1117 states and 3310 transitions. [2021-07-13 20:20:57,265 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) [2021-07-13 20:20:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 3310 transitions. [2021-07-13 20:20:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:20:57,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:57,270 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:57,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:20:57,270 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:57,272 INFO L82 PathProgramCache]: Analyzing trace with hash 91789856, now seen corresponding path program 2 times [2021-07-13 20:20:57,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:57,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476777683] [2021-07-13 20:20:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:57,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:57,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476777683] [2021-07-13 20:20:57,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476777683] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:20:57,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:20:57,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:20:57,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192398028] [2021-07-13 20:20:57,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:20:57,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:57,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:20:57,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:57,316 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) [2021-07-13 20:20:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:57,336 INFO L93 Difference]: Finished difference Result 1228 states and 3641 transitions. [2021-07-13 20:20:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:20:57,357 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 [2021-07-13 20:20:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:57,362 INFO L225 Difference]: With dead ends: 1228 [2021-07-13 20:20:57,362 INFO L226 Difference]: Without dead ends: 1228 [2021-07-13 20:20:57,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-07-13 20:20:57,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1228. [2021-07-13 20:20:57,384 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) [2021-07-13 20:20:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3641 transitions. [2021-07-13 20:20:57,388 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3641 transitions. Word has length 27 [2021-07-13 20:20:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:57,389 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3641 transitions. [2021-07-13 20:20:57,389 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) [2021-07-13 20:20:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3641 transitions. [2021-07-13 20:20:57,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:20:57,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:57,392 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:57,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:20:57,392 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:57,394 INFO L82 PathProgramCache]: Analyzing trace with hash 593775074, now seen corresponding path program 1 times [2021-07-13 20:20:57,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:57,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32863967] [2021-07-13 20:20:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:57,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:57,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32863967] [2021-07-13 20:20:57,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32863967] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:20:57,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:20:57,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:20:57,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584837941] [2021-07-13 20:20:57,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:20:57,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:57,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:20:57,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:57,442 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), 2 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) [2021-07-13 20:20:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:57,455 INFO L93 Difference]: Finished difference Result 1034 states and 3000 transitions. [2021-07-13 20:20:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:20:57,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 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 [2021-07-13 20:20:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:57,460 INFO L225 Difference]: With dead ends: 1034 [2021-07-13 20:20:57,461 INFO L226 Difference]: Without dead ends: 1034 [2021-07-13 20:20:57,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-07-13 20:20:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2021-07-13 20:20:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.904162633107454) internal successors, (3000), 1033 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3000 transitions. [2021-07-13 20:20:57,484 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3000 transitions. Word has length 32 [2021-07-13 20:20:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:57,484 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3000 transitions. [2021-07-13 20:20:57,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 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) [2021-07-13 20:20:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3000 transitions. [2021-07-13 20:20:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 20:20:57,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:57,488 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:57,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:20:57,488 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:57,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:57,488 INFO L82 PathProgramCache]: Analyzing trace with hash 872657612, now seen corresponding path program 2 times [2021-07-13 20:20:57,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:57,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513301356] [2021-07-13 20:20:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:57,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:57,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513301356] [2021-07-13 20:20:57,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513301356] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:20:57,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:20:57,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:20:57,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437063168] [2021-07-13 20:20:57,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:20:57,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:57,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:20:57,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:57,542 INFO L87 Difference]: Start difference. First operand 1034 states and 3000 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) [2021-07-13 20:20:57,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:57,570 INFO L93 Difference]: Finished difference Result 1547 states and 4395 transitions. [2021-07-13 20:20:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:20:57,570 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 [2021-07-13 20:20:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:57,575 INFO L225 Difference]: With dead ends: 1547 [2021-07-13 20:20:57,576 INFO L226 Difference]: Without dead ends: 1219 [2021-07-13 20:20:57,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-07-13 20:20:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1013. [2021-07-13 20:20:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 2.891304347826087) internal successors, (2926), 1012 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2926 transitions. [2021-07-13 20:20:57,604 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2926 transitions. Word has length 32 [2021-07-13 20:20:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:57,604 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 2926 transitions. [2021-07-13 20:20:57,604 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) [2021-07-13 20:20:57,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2926 transitions. [2021-07-13 20:20:57,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:20:57,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:57,608 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:57,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:20:57,608 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:57,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:57,609 INFO L82 PathProgramCache]: Analyzing trace with hash -992029441, now seen corresponding path program 1 times [2021-07-13 20:20:57,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:57,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714560214] [2021-07-13 20:20:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:57,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:57,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714560214] [2021-07-13 20:20:57,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714560214] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:20:57,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:20:57,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:20:57,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438780793] [2021-07-13 20:20:57,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:20:57,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:57,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:20:57,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:57,650 INFO L87 Difference]: Start difference. First operand 1013 states and 2926 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) [2021-07-13 20:20:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:57,658 INFO L93 Difference]: Finished difference Result 605 states and 1684 transitions. [2021-07-13 20:20:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:20:57,659 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 [2021-07-13 20:20:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:57,662 INFO L225 Difference]: With dead ends: 605 [2021-07-13 20:20:57,662 INFO L226 Difference]: Without dead ends: 605 [2021-07-13 20:20:57,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:20:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-07-13 20:20:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2021-07-13 20:20:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.7880794701986753) internal successors, (1684), 604 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:57,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1684 transitions. [2021-07-13 20:20:57,680 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1684 transitions. Word has length 37 [2021-07-13 20:20:57,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:57,683 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1684 transitions. [2021-07-13 20:20:57,684 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) [2021-07-13 20:20:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1684 transitions. [2021-07-13 20:20:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:20:57,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:57,689 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:20:57,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 20:20:57,689 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1267821111, now seen corresponding path program 2 times [2021-07-13 20:20:57,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:57,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360916977] [2021-07-13 20:20:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:57,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:57,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360916977] [2021-07-13 20:20:57,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360916977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:57,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368418856] [2021-07-13 20:20:57,813 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 [2021-07-13 20:20:57,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:20:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:20:57,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:58,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:20:58,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:58,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:58,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:58,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:20:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:58,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368418856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:58,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:58,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-13 20:20:58,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717950559] [2021-07-13 20:20:58,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:20:58,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:58,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:20:58,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:20:58,146 INFO L87 Difference]: Start difference. First operand 605 states and 1684 transitions. Second operand has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:58,414 INFO L93 Difference]: Finished difference Result 1219 states and 3487 transitions. [2021-07-13 20:20:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:20:58,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:20:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:58,420 INFO L225 Difference]: With dead ends: 1219 [2021-07-13 20:20:58,420 INFO L226 Difference]: Without dead ends: 1219 [2021-07-13 20:20:58,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:20:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-07-13 20:20:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 926. [2021-07-13 20:20:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 2.8356756756756756) internal successors, (2623), 925 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 2623 transitions. [2021-07-13 20:20:58,449 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 2623 transitions. Word has length 37 [2021-07-13 20:20:58,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:58,450 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 2623 transitions. [2021-07-13 20:20:58,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 2623 transitions. [2021-07-13 20:20:58,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-13 20:20:58,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:58,452 INFO L508 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] [2021-07-13 20:20:58,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 20:20:58,657 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:58,658 INFO L82 PathProgramCache]: Analyzing trace with hash -571962444, now seen corresponding path program 3 times [2021-07-13 20:20:58,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:58,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222666533] [2021-07-13 20:20:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:58,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:58,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222666533] [2021-07-13 20:20:58,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222666533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:58,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460788703] [2021-07-13 20:20:58,725 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 [2021-07-13 20:20:58,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:20:58,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:58,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:20:58,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:58,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 20:20:58,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:58,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:58,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:58,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:7 [2021-07-13 20:20:58,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:20:58,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:20:58,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:20:58,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:20:58,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:20:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:20:58,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460788703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:58,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:20:58,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-13 20:20:58,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547007245] [2021-07-13 20:20:58,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:20:58,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:58,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:20:58,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:20:58,933 INFO L87 Difference]: Start difference. First operand 926 states and 2623 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:59,158 INFO L93 Difference]: Finished difference Result 1326 states and 3819 transitions. [2021-07-13 20:20:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:20:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-07-13 20:20:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:59,163 INFO L225 Difference]: With dead ends: 1326 [2021-07-13 20:20:59,164 INFO L226 Difference]: Without dead ends: 1326 [2021-07-13 20:20:59,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:20:59,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-07-13 20:20:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1085. [2021-07-13 20:20:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 1084 states have (on average 2.8625461254612548) internal successors, (3103), 1084 states have internal predecessors, (3103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 3103 transitions. [2021-07-13 20:20:59,186 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 3103 transitions. Word has length 42 [2021-07-13 20:20:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:59,186 INFO L482 AbstractCegarLoop]: Abstraction has 1085 states and 3103 transitions. [2021-07-13 20:20:59,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 3103 transitions. [2021-07-13 20:20:59,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:20:59,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:59,188 INFO L508 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] [2021-07-13 20:20:59,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:59,408 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:59,408 INFO L82 PathProgramCache]: Analyzing trace with hash -260382648, now seen corresponding path program 4 times [2021-07-13 20:20:59,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:59,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195247167] [2021-07-13 20:20:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:20:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:20:59,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:20:59,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195247167] [2021-07-13 20:20:59,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195247167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:20:59,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018138531] [2021-07-13 20:20:59,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:59,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:20:59,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:20:59,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:20:59,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:20:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:20:59,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018138531] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:20:59,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:20:59,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-07-13 20:20:59,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938099348] [2021-07-13 20:20:59,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:20:59,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:20:59,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:20:59,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:20:59,549 INFO L87 Difference]: Start difference. First operand 1085 states and 3103 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:59,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:20:59,562 INFO L93 Difference]: Finished difference Result 2090 states and 5979 transitions. [2021-07-13 20:20:59,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:20:59,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:20:59,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:20:59,570 INFO L225 Difference]: With dead ends: 2090 [2021-07-13 20:20:59,570 INFO L226 Difference]: Without dead ends: 2071 [2021-07-13 20:20:59,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:20:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-07-13 20:20:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1782. [2021-07-13 20:20:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 2.9348680516563728) internal successors, (5227), 1781 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5227 transitions. [2021-07-13 20:20:59,605 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5227 transitions. Word has length 47 [2021-07-13 20:20:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:20:59,605 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 5227 transitions. [2021-07-13 20:20:59,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:20:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5227 transitions. [2021-07-13 20:20:59,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 20:20:59,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:20:59,608 INFO L508 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] [2021-07-13 20:20:59,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:20:59,825 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:20:59,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:20:59,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1824157518, now seen corresponding path program 5 times [2021-07-13 20:20:59,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:20:59,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800435211] [2021-07-13 20:20:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:20:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:21:00,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:00,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800435211] [2021-07-13 20:21:00,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800435211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:00,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241077778] [2021-07-13 20:21:00,105 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 [2021-07-13 20:21:00,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:21:00,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:00,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:21:00,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:00,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:21:00,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:00,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:00,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:00,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-07-13 20:21:00,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:21:00,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:00,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:00,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:00,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-13 20:21:00,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-13 20:21:00,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:00,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:00,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:00,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:10 [2021-07-13 20:21:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:21:00,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241077778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:00,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:00,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-07-13 20:21:00,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916489754] [2021-07-13 20:21:00,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:21:00,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:00,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:21:00,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:21:00,396 INFO L87 Difference]: Start difference. First operand 1782 states and 5227 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:00,584 INFO L93 Difference]: Finished difference Result 3759 states and 11172 transitions. [2021-07-13 20:21:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:21:00,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 20:21:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:00,597 INFO L225 Difference]: With dead ends: 3759 [2021-07-13 20:21:00,597 INFO L226 Difference]: Without dead ends: 3024 [2021-07-13 20:21:00,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:21:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-07-13 20:21:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2478. [2021-07-13 20:21:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.9644731530076704) internal successors, (7343), 2477 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 7343 transitions. [2021-07-13 20:21:00,651 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 7343 transitions. Word has length 47 [2021-07-13 20:21:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:00,651 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 7343 transitions. [2021-07-13 20:21:00,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 7343 transitions. [2021-07-13 20:21:00,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 20:21:00,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:00,656 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-07-13 20:21:00,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:00,876 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:00,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:00,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1777341031, now seen corresponding path program 6 times [2021-07-13 20:21:00,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:00,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34427551] [2021-07-13 20:21:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:21:00,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:00,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34427551] [2021-07-13 20:21:00,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34427551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:00,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426753206] [2021-07-13 20:21:00,901 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 [2021-07-13 20:21:00,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:21:00,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:00,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:21:00,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-13 20:21:01,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426753206] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:21:01,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:21:01,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-07-13 20:21:01,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303240968] [2021-07-13 20:21:01,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:21:01,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:01,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:21:01,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:21:01,050 INFO L87 Difference]: Start difference. First operand 2478 states and 7343 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:01,089 INFO L93 Difference]: Finished difference Result 4728 states and 14010 transitions. [2021-07-13 20:21:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:21:01,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-13 20:21:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:01,107 INFO L225 Difference]: With dead ends: 4728 [2021-07-13 20:21:01,107 INFO L226 Difference]: Without dead ends: 4688 [2021-07-13 20:21:01,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:21:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4688 states. [2021-07-13 20:21:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4688 to 3600. [2021-07-13 20:21:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 3599 states have (on average 3.0227841066963044) internal successors, (10879), 3599 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 10879 transitions. [2021-07-13 20:21:01,201 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 10879 transitions. Word has length 52 [2021-07-13 20:21:01,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:01,202 INFO L482 AbstractCegarLoop]: Abstraction has 3600 states and 10879 transitions. [2021-07-13 20:21:01,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:01,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 10879 transitions. [2021-07-13 20:21:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-07-13 20:21:01,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:01,209 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2021-07-13 20:21:01,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 20:21:01,428 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:01,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1880054383, now seen corresponding path program 7 times [2021-07-13 20:21:01,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:01,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145515411] [2021-07-13 20:21:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:21:01,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:01,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145515411] [2021-07-13 20:21:01,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145515411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:01,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416964181] [2021-07-13 20:21:01,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:01,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:21:01,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:01,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:21:01,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:01,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:01,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:01,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:21:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:21:01,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416964181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:01,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:01,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2021-07-13 20:21:01,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308949587] [2021-07-13 20:21:01,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:21:01,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:01,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:21:01,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:21:01,742 INFO L87 Difference]: Start difference. First operand 3600 states and 10879 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:01,913 INFO L93 Difference]: Finished difference Result 671 states and 1625 transitions. [2021-07-13 20:21:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:21:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-07-13 20:21:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:01,922 INFO L225 Difference]: With dead ends: 671 [2021-07-13 20:21:01,922 INFO L226 Difference]: Without dead ends: 629 [2021-07-13 20:21:01,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:21:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-07-13 20:21:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2021-07-13 20:21:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.4140127388535033) internal successors, (1516), 628 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1516 transitions. [2021-07-13 20:21:01,941 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1516 transitions. Word has length 52 [2021-07-13 20:21:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:01,942 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1516 transitions. [2021-07-13 20:21:01,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1516 transitions. [2021-07-13 20:21:01,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 20:21:01,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:01,944 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-07-13 20:21:02,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:02,163 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:02,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:02,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1013871834, now seen corresponding path program 8 times [2021-07-13 20:21:02,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:02,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472500497] [2021-07-13 20:21:02,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:21:02,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:02,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472500497] [2021-07-13 20:21:02,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472500497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:02,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199729273] [2021-07-13 20:21:02,324 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:02,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:21:02,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:02,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:21:02,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:02,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:21:02,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:02,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:02,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:02,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-07-13 20:21:02,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:21:02,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:02,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:02,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:02,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:21:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 20:21:02,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199729273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:02,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:02,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-13 20:21:02,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361906035] [2021-07-13 20:21:02,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:21:02,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:02,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:21:02,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:21:02,559 INFO L87 Difference]: Start difference. First operand 629 states and 1516 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:02,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:02,850 INFO L93 Difference]: Finished difference Result 559 states and 1310 transitions. [2021-07-13 20:21:02,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:21:02,850 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-07-13 20:21:02,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:02,851 INFO L225 Difference]: With dead ends: 559 [2021-07-13 20:21:02,852 INFO L226 Difference]: Without dead ends: 559 [2021-07-13 20:21:02,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:21:02,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-07-13 20:21:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-07-13 20:21:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.347670250896057) internal successors, (1310), 558 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1310 transitions. [2021-07-13 20:21:02,860 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1310 transitions. Word has length 57 [2021-07-13 20:21:02,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:02,860 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1310 transitions. [2021-07-13 20:21:02,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:02,860 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1310 transitions. [2021-07-13 20:21:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 20:21:02,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:21:02,861 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-07-13 20:21:03,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:03,079 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:21:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:21:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash 981328780, now seen corresponding path program 9 times [2021-07-13 20:21:03,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:21:03,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222846448] [2021-07-13 20:21:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:21:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:21:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:21:03,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:21:03,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222846448] [2021-07-13 20:21:03,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222846448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:03,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59988973] [2021-07-13 20:21:03,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:21:04,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:21:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:21:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:21:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:21:04,647 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:21:04,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:21:04,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:04,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:04,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:04,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:53 [2021-07-13 20:21:04,757 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 20:21:04,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-13 20:21:04,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:04,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:04,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:04,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:37 [2021-07-13 20:21:04,869 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:21:04,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 23 [2021-07-13 20:21:04,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:21:04,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:21:04,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:21:04,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:17 [2021-07-13 20:21:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:21:05,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59988973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:21:05,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:21:05,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2021-07-13 20:21:05,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085377806] [2021-07-13 20:21:05,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 20:21:05,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:21:05,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 20:21:05,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:21:05,024 INFO L87 Difference]: Start difference. First operand 559 states and 1310 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:07,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:21:07,383 INFO L93 Difference]: Finished difference Result 653 states and 1524 transitions. [2021-07-13 20:21:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:21:07,384 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-13 20:21:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:21:07,384 INFO L225 Difference]: With dead ends: 653 [2021-07-13 20:21:07,384 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 20:21:07,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 2903.1ms TimeCoverageRelationStatistics Valid=519, Invalid=3387, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:21:07,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 20:21:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 20:21:07,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 20:21:07,385 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2021-07-13 20:21:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:21:07,386 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 20:21:07,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:21:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 20:21:07,386 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 20:21:07,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:21:07,604 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:21:07,606 INFO L202 PluginConnector]: Adding new model ring.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:21:07 BasicIcfg [2021-07-13 20:21:07,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:21:07,606 INFO L168 Benchmark]: Toolchain (without parser) took 11312.51 ms. Allocated memory was 204.5 MB in the beginning and 460.3 MB in the end (delta: 255.9 MB). Free memory was 184.3 MB in the beginning and 318.3 MB in the end (delta: -134.0 MB). Peak memory consumption was 123.4 MB. Max. memory is 8.0 GB. [2021-07-13 20:21:07,606 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 204.5 MB. Free memory is still 185.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:21:07,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.48 ms. Allocated memory is still 204.5 MB. Free memory was 184.2 MB in the beginning and 182.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:21:07,606 INFO L168 Benchmark]: Boogie Preprocessor took 11.17 ms. Allocated memory is still 204.5 MB. Free memory was 182.7 MB in the beginning and 181.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:21:07,607 INFO L168 Benchmark]: RCFGBuilder took 261.08 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 163.7 MB in the end (delta: 18.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-07-13 20:21:07,607 INFO L168 Benchmark]: TraceAbstraction took 11009.14 ms. Allocated memory was 204.5 MB in the beginning and 460.3 MB in the end (delta: 255.9 MB). Free memory was 163.2 MB in the beginning and 318.3 MB in the end (delta: -155.1 MB). Peak memory consumption was 102.4 MB. Max. memory is 8.0 GB. [2021-07-13 20:21:07,607 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 0.10 ms. Allocated memory is still 204.5 MB. Free memory is still 185.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.48 ms. Allocated memory is still 204.5 MB. Free memory was 184.2 MB in the beginning and 182.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.17 ms. Allocated memory is still 204.5 MB. Free memory was 182.7 MB in the beginning and 181.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 261.08 ms. Allocated memory is still 204.5 MB. Free memory was 181.7 MB in the beginning and 163.7 MB in the end (delta: 18.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11009.14 ms. Allocated memory was 204.5 MB in the beginning and 460.3 MB in the end (delta: 255.9 MB). Free memory was 163.2 MB in the beginning and 318.3 MB in the end (delta: -155.1 MB). Peak memory consumption was 102.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 104]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10883.5ms, OverallIterations: 14, TraceHistogramMax: 3, EmptinessCheckTime: 70.0ms, AutomataDifference: 3854.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 75.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 764 SDtfs, 1478 SDslu, 4293 SDs, 0 SdLazy, 2953 SolverSat, 222 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1277.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 541 GetRequests, 370 SyntacticMatches, 5 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 3988.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3600occurred in iteration=11, InterpolantAutomatonStates: 125, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 459.1ms AutomataMinimizationTime, 14 MinimizatonAttempts, 2663 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 107.4ms SsaConstructionTime, 335.7ms SatisfiabilityAnalysisTime, 3704.9ms InterpolantComputationTime, 969 NumberOfCodeBlocks, 961 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 947 ConstructedInterpolants, 0 QuantifiedInterpolants, 5999 SizeOfPredicates, 42 NumberOfNonLiveVariables, 1010 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 22 InterpolantComputations, 8 PerfectInterpolantSequences, 144/327 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...