/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/commit-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:18:42,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:18:42,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:18:42,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:18:42,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 20:18:42,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 20:18:42,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 20:18:42,926 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 20:18:42,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:18:42,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:18:42,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:18:42,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:18:42,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:18:42,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:18:42,942 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:18:42,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:18:42,943 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:18:42,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:18:42,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:18:42,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:18:42,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:18:42,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:18:42,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:18:42,944 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:18:42,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:18:42,944 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:18:42,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:18:42,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:18:42,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:18:42,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:18:42,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:18:42,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:18:42,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:18:42,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:18:42,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:18:42,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:18:42,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:18:42,945 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:18:42,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:18:42,945 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:18:43,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:18:43,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:18:43,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:18:43,184 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:18:43,189 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:18:43,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl [2021-07-13 20:18:43,189 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl' [2021-07-13 20:18:43,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:18:43,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:18:43,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:18:43,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:18:43,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:18:43,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:43" (1/1) ... [2021-07-13 20:18:43,228 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:43" (1/1) ... [2021-07-13 20:18:43,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:18:43,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:18:43,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:18:43,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:18:43,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:43" (1/1) ... [2021-07-13 20:18:43,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:43" (1/1) ... [2021-07-13 20:18:43,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:43" (1/1) ... [2021-07-13 20:18:43,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:43" (1/1) ... [2021-07-13 20:18:43,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:43" (1/1) ... [2021-07-13 20:18:43,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:43" (1/1) ... [2021-07-13 20:18:43,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:43" (1/1) ... [2021-07-13 20:18:43,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:18:43,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:18:43,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:18:43,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:18:43,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:43" (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 20:18:43,318 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:18:43,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:18:43,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:18:43,319 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:18:43,319 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:18:43,319 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:18:43,319 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:18:43,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:18:43,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:18:43,319 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:18:43,319 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:18:43,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:18:43,321 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 20:18:43,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:18:43,658 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-13 20:18:43,659 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-13 20:18:43,659 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-13 20:18:43,659 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-07-13 20:18:43,660 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:18:43 BoogieIcfgContainer [2021-07-13 20:18:43,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:18:43,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:18:43,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:18:43,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:18:43,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:18:43" (1/2) ... [2021-07-13 20:18:43,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c9bf01 and model type commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:18:43, skipping insertion in model container [2021-07-13 20:18:43,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:18:43" (2/2) ... [2021-07-13 20:18:43,665 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.bpl [2021-07-13 20:18:43,668 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:18:43,668 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:18:43,668 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:18:43,668 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:18:43,695 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:18:43,713 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:18:43,738 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:18:43,738 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:18:43,740 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:18:43,740 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:18:43,740 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:18:43,740 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:18:43,740 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:18:43,741 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:18:43,751 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 64 flow [2021-07-13 20:18:43,761 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 20:18:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 20:18:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 20:18:43,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:43,767 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:43,767 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:43,771 INFO L82 PathProgramCache]: Analyzing trace with hash -628206710, now seen corresponding path program 1 times [2021-07-13 20:18:43,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:43,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982503811] [2021-07-13 20:18:43,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:43,849 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 20:18:43,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:43,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982503811] [2021-07-13 20:18:43,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982503811] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:43,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:18:43,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:18:43,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069424332] [2021-07-13 20:18:43,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:18:43,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:43,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:18:43,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:43,863 INFO L87 Difference]: Start difference. First operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 20:18:43,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:43,890 INFO L93 Difference]: Finished difference Result 46 states and 118 transitions. [2021-07-13 20:18:43,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:43,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 20:18:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:43,899 INFO L225 Difference]: With dead ends: 46 [2021-07-13 20:18:43,899 INFO L226 Difference]: Without dead ends: 42 [2021-07-13 20:18:43,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-07-13 20:18:43,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-07-13 20:18:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 20:18:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 109 transitions. [2021-07-13 20:18:43,922 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 109 transitions. Word has length 12 [2021-07-13 20:18:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:43,923 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 109 transitions. [2021-07-13 20:18:43,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 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 20:18:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 109 transitions. [2021-07-13 20:18:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 20:18:43,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:43,924 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:43,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:18:43,924 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:43,924 INFO L82 PathProgramCache]: Analyzing trace with hash 402586222, now seen corresponding path program 1 times [2021-07-13 20:18:43,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:43,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539640525] [2021-07-13 20:18:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:43,962 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 20:18:43,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:43,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539640525] [2021-07-13 20:18:43,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539640525] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:43,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:18:43,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:18:43,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870511269] [2021-07-13 20:18:43,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:18:43,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:43,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:18:43,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:43,964 INFO L87 Difference]: Start difference. First operand 42 states and 109 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 20:18:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:43,971 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2021-07-13 20:18:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:43,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 20:18:43,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:43,972 INFO L225 Difference]: With dead ends: 59 [2021-07-13 20:18:43,972 INFO L226 Difference]: Without dead ends: 57 [2021-07-13 20:18:43,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:43,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-07-13 20:18:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-07-13 20:18:43,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 20:18:43,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 115 transitions. [2021-07-13 20:18:43,979 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 115 transitions. Word has length 13 [2021-07-13 20:18:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:43,979 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 115 transitions. [2021-07-13 20:18:43,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 20:18:43,979 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 115 transitions. [2021-07-13 20:18:43,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 20:18:43,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:43,980 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:43,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:18:43,980 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:43,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:43,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1959261122, now seen corresponding path program 1 times [2021-07-13 20:18:43,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:43,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309922393] [2021-07-13 20:18:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:44,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309922393] [2021-07-13 20:18:44,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309922393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958541243] [2021-07-13 20:18:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:44,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:18:44,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:44,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958541243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:44,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:44,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-13 20:18:44,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69783082] [2021-07-13 20:18:44,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:18:44,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:44,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:18:44,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:18:44,141 INFO L87 Difference]: Start difference. First operand 46 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 20:18:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:44,156 INFO L93 Difference]: Finished difference Result 65 states and 168 transitions. [2021-07-13 20:18:44,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:44,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 20:18:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:44,157 INFO L225 Difference]: With dead ends: 65 [2021-07-13 20:18:44,157 INFO L226 Difference]: Without dead ends: 59 [2021-07-13 20:18:44,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:18:44,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-13 20:18:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-07-13 20:18:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.7115384615384617) internal successors, (141), 52 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 20:18:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 141 transitions. [2021-07-13 20:18:44,163 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 141 transitions. Word has length 13 [2021-07-13 20:18:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:44,163 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 141 transitions. [2021-07-13 20:18:44,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 20:18:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 141 transitions. [2021-07-13 20:18:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 20:18:44,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:44,164 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:44,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 20:18:44,383 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:44,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:44,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1085270368, now seen corresponding path program 1 times [2021-07-13 20:18:44,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:44,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793991021] [2021-07-13 20:18:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:44,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:44,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793991021] [2021-07-13 20:18:44,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793991021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:44,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417216796] [2021-07-13 20:18:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:18:44,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:44,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417216796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:44,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:44,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-13 20:18:44,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830222124] [2021-07-13 20:18:44,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:18:44,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:44,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:18:44,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:18:44,557 INFO L87 Difference]: Start difference. First operand 53 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:44,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:44,575 INFO L93 Difference]: Finished difference Result 68 states and 170 transitions. [2021-07-13 20:18:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:44,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 20:18:44,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:44,576 INFO L225 Difference]: With dead ends: 68 [2021-07-13 20:18:44,576 INFO L226 Difference]: Without dead ends: 49 [2021-07-13 20:18:44,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:18:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-13 20:18:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-07-13 20:18:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.625) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 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 20:18:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 126 transitions. [2021-07-13 20:18:44,580 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 126 transitions. Word has length 13 [2021-07-13 20:18:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:44,581 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 126 transitions. [2021-07-13 20:18:44,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 126 transitions. [2021-07-13 20:18:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 20:18:44,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:44,584 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:44,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:44,799 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash -242961336, now seen corresponding path program 1 times [2021-07-13 20:18:44,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:44,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504353890] [2021-07-13 20:18:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:44,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:44,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504353890] [2021-07-13 20:18:44,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504353890] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:44,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:18:44,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:18:44,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564794637] [2021-07-13 20:18:44,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:18:44,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:44,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:18:44,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:44,826 INFO L87 Difference]: Start difference. First operand 49 states and 126 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 20:18:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:44,831 INFO L93 Difference]: Finished difference Result 29 states and 63 transitions. [2021-07-13 20:18:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:18:44,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 20:18:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:44,832 INFO L225 Difference]: With dead ends: 29 [2021-07-13 20:18:44,832 INFO L226 Difference]: Without dead ends: 28 [2021-07-13 20:18:44,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:18:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-13 20:18:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-07-13 20:18:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 20:18:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 62 transitions. [2021-07-13 20:18:44,834 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 62 transitions. Word has length 14 [2021-07-13 20:18:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:44,834 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 62 transitions. [2021-07-13 20:18:44,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 20:18:44,834 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 62 transitions. [2021-07-13 20:18:44,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 20:18:44,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:44,835 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:44,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:18:44,835 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:44,835 INFO L82 PathProgramCache]: Analyzing trace with hash -757524308, now seen corresponding path program 1 times [2021-07-13 20:18:44,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:44,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359660084] [2021-07-13 20:18:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:44,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:44,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359660084] [2021-07-13 20:18:44,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359660084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:44,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391644723] [2021-07-13 20:18:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:18:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:44,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:18:44,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:44,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391644723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:44,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:44,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-13 20:18:44,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840518624] [2021-07-13 20:18:44,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:18:44,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:44,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:18:44,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:18:44,996 INFO L87 Difference]: Start difference. First operand 28 states and 62 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 20:18:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:45,046 INFO L93 Difference]: Finished difference Result 47 states and 113 transitions. [2021-07-13 20:18:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:18:45,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 20:18:45,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:45,047 INFO L225 Difference]: With dead ends: 47 [2021-07-13 20:18:45,047 INFO L226 Difference]: Without dead ends: 43 [2021-07-13 20:18:45,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:18:45,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-13 20:18:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-07-13 20:18:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 20:18:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 103 transitions. [2021-07-13 20:18:45,050 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 103 transitions. Word has length 14 [2021-07-13 20:18:45,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:45,050 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 103 transitions. [2021-07-13 20:18:45,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 20:18:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 103 transitions. [2021-07-13 20:18:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:18:45,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:45,051 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:45,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:45,269 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:45,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1436036254, now seen corresponding path program 1 times [2021-07-13 20:18:45,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:45,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267371991] [2021-07-13 20:18:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:45,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:45,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267371991] [2021-07-13 20:18:45,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267371991] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:18:45,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:18:45,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:18:45,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020128894] [2021-07-13 20:18:45,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:18:45,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:45,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:18:45,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:18:45,313 INFO L87 Difference]: Start difference. First operand 42 states and 103 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 20:18:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:45,321 INFO L93 Difference]: Finished difference Result 60 states and 135 transitions. [2021-07-13 20:18:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:18:45,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 20:18:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:45,322 INFO L225 Difference]: With dead ends: 60 [2021-07-13 20:18:45,322 INFO L226 Difference]: Without dead ends: 58 [2021-07-13 20:18:45,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:18:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-13 20:18:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-07-13 20:18:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 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 20:18:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2021-07-13 20:18:45,330 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2021-07-13 20:18:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:45,330 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2021-07-13 20:18:45,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 20:18:45,330 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2021-07-13 20:18:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:18:45,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:45,331 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:45,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 20:18:45,332 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2049584416, now seen corresponding path program 2 times [2021-07-13 20:18:45,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:45,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443172525] [2021-07-13 20:18:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:45,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:45,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443172525] [2021-07-13 20:18:45,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443172525] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:45,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323179908] [2021-07-13 20:18:45,419 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 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 20:18:45,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:45,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:45,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:18:45,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:45,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323179908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:45,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:45,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 20:18:45,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788398033] [2021-07-13 20:18:45,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:18:45,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:45,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:18:45,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:18:45,550 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 20:18:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:45,609 INFO L93 Difference]: Finished difference Result 77 states and 188 transitions. [2021-07-13 20:18:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:18:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 20:18:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:45,610 INFO L225 Difference]: With dead ends: 77 [2021-07-13 20:18:45,610 INFO L226 Difference]: Without dead ends: 67 [2021-07-13 20:18:45,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:18:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-13 20:18:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-07-13 20:18:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.58) internal successors, (129), 50 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 20:18:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 129 transitions. [2021-07-13 20:18:45,614 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 129 transitions. Word has length 15 [2021-07-13 20:18:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:45,614 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 129 transitions. [2021-07-13 20:18:45,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 20:18:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 129 transitions. [2021-07-13 20:18:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:18:45,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:45,615 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:45,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:45,831 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:45,832 INFO L82 PathProgramCache]: Analyzing trace with hash 833536548, now seen corresponding path program 3 times [2021-07-13 20:18:45,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:45,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633266955] [2021-07-13 20:18:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:45,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:45,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633266955] [2021-07-13 20:18:45,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633266955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:45,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355099433] [2021-07-13 20:18:45,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:45,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:18:45,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:45,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:18:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:46,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355099433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:46,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:46,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 20:18:46,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181463051] [2021-07-13 20:18:46,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:18:46,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:46,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:18:46,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:18:46,065 INFO L87 Difference]: Start difference. First operand 51 states and 129 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 20:18:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:46,131 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2021-07-13 20:18:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:18:46,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 20:18:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:46,132 INFO L225 Difference]: With dead ends: 80 [2021-07-13 20:18:46,132 INFO L226 Difference]: Without dead ends: 71 [2021-07-13 20:18:46,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:18:46,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-07-13 20:18:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2021-07-13 20:18:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.6964285714285716) internal successors, (151), 56 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 20:18:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 151 transitions. [2021-07-13 20:18:46,135 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 151 transitions. Word has length 15 [2021-07-13 20:18:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:46,135 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 151 transitions. [2021-07-13 20:18:46,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 20:18:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 151 transitions. [2021-07-13 20:18:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 20:18:46,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:46,136 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:46,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:46,352 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:46,352 INFO L82 PathProgramCache]: Analyzing trace with hash 36878570, now seen corresponding path program 2 times [2021-07-13 20:18:46,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:46,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755153717] [2021-07-13 20:18:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:46,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:46,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755153717] [2021-07-13 20:18:46,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755153717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:46,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496888681] [2021-07-13 20:18:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:18:46,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:46,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:46,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:18:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:46,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496888681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:46,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:46,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-13 20:18:46,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804180694] [2021-07-13 20:18:46,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:18:46,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:46,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:18:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:18:46,681 INFO L87 Difference]: Start difference. First operand 57 states and 151 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 20:18:46,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:46,835 INFO L93 Difference]: Finished difference Result 118 states and 329 transitions. [2021-07-13 20:18:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:18:46,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 20:18:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:46,836 INFO L225 Difference]: With dead ends: 118 [2021-07-13 20:18:46,836 INFO L226 Difference]: Without dead ends: 114 [2021-07-13 20:18:46,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:18:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-13 20:18:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-07-13 20:18:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 3.0675675675675675) internal successors, (227), 74 states have internal predecessors, (227), 0 states have call successors, (0), 0 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 20:18:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 227 transitions. [2021-07-13 20:18:46,841 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 227 transitions. Word has length 16 [2021-07-13 20:18:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:46,841 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 227 transitions. [2021-07-13 20:18:46,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 20:18:46,841 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 227 transitions. [2021-07-13 20:18:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 20:18:46,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:46,842 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:47,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:47,057 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:47,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:47,057 INFO L82 PathProgramCache]: Analyzing trace with hash 846225196, now seen corresponding path program 4 times [2021-07-13 20:18:47,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:47,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231468078] [2021-07-13 20:18:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:47,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:47,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231468078] [2021-07-13 20:18:47,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231468078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:47,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485085189] [2021-07-13 20:18:47,126 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 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 20:18:47,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:47,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:47,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:18:47,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:47,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485085189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:47,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:47,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 20:18:47,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991448037] [2021-07-13 20:18:47,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:18:47,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:47,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:18:47,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:18:47,223 INFO L87 Difference]: Start difference. First operand 75 states and 227 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:47,264 INFO L93 Difference]: Finished difference Result 80 states and 225 transitions. [2021-07-13 20:18:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:18:47,264 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 20:18:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:47,265 INFO L225 Difference]: With dead ends: 80 [2021-07-13 20:18:47,265 INFO L226 Difference]: Without dead ends: 77 [2021-07-13 20:18:47,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:18:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-13 20:18:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-07-13 20:18:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.943661971830986) internal successors, (209), 71 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 20:18:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 209 transitions. [2021-07-13 20:18:47,268 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 209 transitions. Word has length 16 [2021-07-13 20:18:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:47,268 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 209 transitions. [2021-07-13 20:18:47,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:47,268 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 209 transitions. [2021-07-13 20:18:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:18:47,269 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:47,269 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:47,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:18:47,486 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:47,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:47,486 INFO L82 PathProgramCache]: Analyzing trace with hash 292721696, now seen corresponding path program 3 times [2021-07-13 20:18:47,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:47,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953358176] [2021-07-13 20:18:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:47,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:47,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953358176] [2021-07-13 20:18:47,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953358176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:47,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071565190] [2021-07-13 20:18:47,534 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 20:18:47,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:18:47,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:47,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:18:47,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:47,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071565190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:47,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:47,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-13 20:18:47,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910250870] [2021-07-13 20:18:47,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:18:47,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:47,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:18:47,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:18:47,723 INFO L87 Difference]: Start difference. First operand 72 states and 209 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 20:18:47,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:47,876 INFO L93 Difference]: Finished difference Result 130 states and 354 transitions. [2021-07-13 20:18:47,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:18:47,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 17 [2021-07-13 20:18:47,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:47,877 INFO L225 Difference]: With dead ends: 130 [2021-07-13 20:18:47,877 INFO L226 Difference]: Without dead ends: 126 [2021-07-13 20:18:47,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 196.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:18:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-13 20:18:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2021-07-13 20:18:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 3.075) internal successors, (246), 80 states have internal predecessors, (246), 0 states have call successors, (0), 0 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 20:18:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 246 transitions. [2021-07-13 20:18:47,880 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 246 transitions. Word has length 17 [2021-07-13 20:18:47,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:47,881 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 246 transitions. [2021-07-13 20:18:47,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 20:18:47,881 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 246 transitions. [2021-07-13 20:18:47,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:18:47,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:47,881 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:48,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:18:48,107 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1102068322, now seen corresponding path program 4 times [2021-07-13 20:18:48,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:48,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313995095] [2021-07-13 20:18:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:48,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:48,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313995095] [2021-07-13 20:18:48,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313995095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:48,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70950674] [2021-07-13 20:18:48,170 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:48,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:48,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:48,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:18:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:48,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70950674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:48,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:48,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 20:18:48,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952191121] [2021-07-13 20:18:48,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:18:48,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:48,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:18:48,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:18:48,329 INFO L87 Difference]: Start difference. First operand 81 states and 246 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 20:18:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:48,434 INFO L93 Difference]: Finished difference Result 94 states and 267 transitions. [2021-07-13 20:18:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:18:48,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 17 [2021-07-13 20:18:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:48,435 INFO L225 Difference]: With dead ends: 94 [2021-07-13 20:18:48,436 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 20:18:48,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 20:18:48,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2021-07-13 20:18:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 3.049382716049383) internal successors, (247), 81 states have internal predecessors, (247), 0 states have call successors, (0), 0 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 20:18:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 247 transitions. [2021-07-13 20:18:48,438 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 247 transitions. Word has length 17 [2021-07-13 20:18:48,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:48,439 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 247 transitions. [2021-07-13 20:18:48,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 20:18:48,439 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 247 transitions. [2021-07-13 20:18:48,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:18:48,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:48,439 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:48,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:48,653 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1878688318, now seen corresponding path program 5 times [2021-07-13 20:18:48,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:48,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339338107] [2021-07-13 20:18:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:48,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:48,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339338107] [2021-07-13 20:18:48,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339338107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:48,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048577744] [2021-07-13 20:18:48,703 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:48,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:18:48,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:48,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:18:48,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:48,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048577744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:48,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:48,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 20:18:48,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246904228] [2021-07-13 20:18:48,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:18:48,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:48,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:18:48,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:18:48,855 INFO L87 Difference]: Start difference. First operand 82 states and 247 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 20:18:48,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:48,877 INFO L93 Difference]: Finished difference Result 110 states and 254 transitions. [2021-07-13 20:18:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:18:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 20:18:48,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:48,879 INFO L225 Difference]: With dead ends: 110 [2021-07-13 20:18:48,879 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 20:18:48,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:18:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 20:18:48,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2021-07-13 20:18:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 68 states have internal predecessors, (179), 0 states have call successors, (0), 0 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 20:18:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 179 transitions. [2021-07-13 20:18:48,883 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 179 transitions. Word has length 17 [2021-07-13 20:18:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:48,883 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 179 transitions. [2021-07-13 20:18:48,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 20:18:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 179 transitions. [2021-07-13 20:18:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:18:48,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:48,884 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:49,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:49,097 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash -366075990, now seen corresponding path program 5 times [2021-07-13 20:18:49,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:49,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704945934] [2021-07-13 20:18:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:49,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:49,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704945934] [2021-07-13 20:18:49,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704945934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:49,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825095936] [2021-07-13 20:18:49,146 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:49,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:18:49,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:49,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:18:49,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:49,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825095936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:49,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:49,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-07-13 20:18:49,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918897980] [2021-07-13 20:18:49,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:18:49,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:49,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:18:49,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:18:49,326 INFO L87 Difference]: Start difference. First operand 69 states and 179 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 20:18:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:49,423 INFO L93 Difference]: Finished difference Result 190 states and 501 transitions. [2021-07-13 20:18:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:18:49,423 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 20:18:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:49,424 INFO L225 Difference]: With dead ends: 190 [2021-07-13 20:18:49,424 INFO L226 Difference]: Without dead ends: 176 [2021-07-13 20:18:49,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-13 20:18:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 106. [2021-07-13 20:18:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.1333333333333333) internal successors, (329), 105 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 20:18:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 329 transitions. [2021-07-13 20:18:49,428 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 329 transitions. Word has length 18 [2021-07-13 20:18:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:49,428 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 329 transitions. [2021-07-13 20:18:49,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 20:18:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 329 transitions. [2021-07-13 20:18:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:18:49,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:49,428 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:49,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 20:18:49,641 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash 443270636, now seen corresponding path program 6 times [2021-07-13 20:18:49,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:49,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56494508] [2021-07-13 20:18:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:49,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:49,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56494508] [2021-07-13 20:18:49,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56494508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:49,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188801893] [2021-07-13 20:18:49,737 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:49,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:18:49,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:49,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:18:49,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:49,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188801893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:49,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:49,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:18:49,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305430760] [2021-07-13 20:18:49,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:18:49,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:49,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:18:49,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:18:49,942 INFO L87 Difference]: Start difference. First operand 106 states and 329 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 20:18:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:50,012 INFO L93 Difference]: Finished difference Result 120 states and 354 transitions. [2021-07-13 20:18:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:18:50,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 20:18:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:50,014 INFO L225 Difference]: With dead ends: 120 [2021-07-13 20:18:50,014 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 20:18:50,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:18:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 20:18:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-07-13 20:18:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 3.074074074074074) internal successors, (332), 108 states have internal predecessors, (332), 0 states have call successors, (0), 0 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 20:18:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 332 transitions. [2021-07-13 20:18:50,018 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 332 transitions. Word has length 18 [2021-07-13 20:18:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:50,018 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 332 transitions. [2021-07-13 20:18:50,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 20:18:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 332 transitions. [2021-07-13 20:18:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:18:50,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:50,021 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:50,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:50,229 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash 5973854, now seen corresponding path program 7 times [2021-07-13 20:18:50,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:50,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186851761] [2021-07-13 20:18:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:50,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:50,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186851761] [2021-07-13 20:18:50,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186851761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:50,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273686545] [2021-07-13 20:18:50,327 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:50,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:18:50,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:50,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273686545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:50,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:50,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 20:18:50,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326693813] [2021-07-13 20:18:50,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:18:50,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:50,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:18:50,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:18:50,575 INFO L87 Difference]: Start difference. First operand 109 states and 332 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:50,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:50,681 INFO L93 Difference]: Finished difference Result 60 states and 141 transitions. [2021-07-13 20:18:50,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:18:50,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:18:50,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:50,682 INFO L225 Difference]: With dead ends: 60 [2021-07-13 20:18:50,682 INFO L226 Difference]: Without dead ends: 56 [2021-07-13 20:18:50,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-13 20:18:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-07-13 20:18:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.4814814814814814) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 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 20:18:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 134 transitions. [2021-07-13 20:18:50,684 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 134 transitions. Word has length 19 [2021-07-13 20:18:50,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:50,684 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 134 transitions. [2021-07-13 20:18:50,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 134 transitions. [2021-07-13 20:18:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:18:50,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:50,685 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:50,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:18:50,901 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash 815320480, now seen corresponding path program 8 times [2021-07-13 20:18:50,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:50,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368226827] [2021-07-13 20:18:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:51,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:51,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368226827] [2021-07-13 20:18:51,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368226827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:51,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369819899] [2021-07-13 20:18:51,001 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:51,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:51,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:51,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:18:51,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:51,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369819899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:51,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:51,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:18:51,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153345839] [2021-07-13 20:18:51,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:18:51,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:51,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:18:51,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:18:51,299 INFO L87 Difference]: Start difference. First operand 55 states and 134 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:51,455 INFO L93 Difference]: Finished difference Result 71 states and 176 transitions. [2021-07-13 20:18:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:18:51,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:18:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:51,456 INFO L225 Difference]: With dead ends: 71 [2021-07-13 20:18:51,456 INFO L226 Difference]: Without dead ends: 67 [2021-07-13 20:18:51,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:18:51,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-13 20:18:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-07-13 20:18:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.564516129032258) internal successors, (159), 62 states have internal predecessors, (159), 0 states have call successors, (0), 0 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 20:18:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 159 transitions. [2021-07-13 20:18:51,458 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 159 transitions. Word has length 19 [2021-07-13 20:18:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:51,458 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 159 transitions. [2021-07-13 20:18:51,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 159 transitions. [2021-07-13 20:18:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:18:51,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:51,459 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:51,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:51,673 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:51,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1345382870, now seen corresponding path program 9 times [2021-07-13 20:18:51,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:51,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354580843] [2021-07-13 20:18:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:51,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:51,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354580843] [2021-07-13 20:18:51,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354580843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:51,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317512352] [2021-07-13 20:18:51,747 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:51,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:18:51,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:51,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 20:18:51,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:51,970 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 7 treesize of output 3 [2021-07-13 20:18:51,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:51,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-13 20:18:51,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:52,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:52,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-13 20:18:52,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-13 20:18:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:52,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317512352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:52,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:52,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 20:18:52,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382490835] [2021-07-13 20:18:52,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:18:52,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:52,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:18:52,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:52,107 INFO L87 Difference]: Start difference. First operand 63 states and 159 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:52,378 INFO L93 Difference]: Finished difference Result 392 states and 980 transitions. [2021-07-13 20:18:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:18:52,379 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:18:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:52,380 INFO L225 Difference]: With dead ends: 392 [2021-07-13 20:18:52,380 INFO L226 Difference]: Without dead ends: 370 [2021-07-13 20:18:52,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:18:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-07-13 20:18:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 137. [2021-07-13 20:18:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.25) internal successors, (442), 136 states have internal predecessors, (442), 0 states have call successors, (0), 0 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 20:18:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 442 transitions. [2021-07-13 20:18:52,385 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 442 transitions. Word has length 20 [2021-07-13 20:18:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:52,385 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 442 transitions. [2021-07-13 20:18:52,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:52,385 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 442 transitions. [2021-07-13 20:18:52,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:18:52,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:52,386 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:52,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:18:52,603 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:52,603 INFO L82 PathProgramCache]: Analyzing trace with hash -536036244, now seen corresponding path program 10 times [2021-07-13 20:18:52,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:52,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110990601] [2021-07-13 20:18:52,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:52,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:52,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110990601] [2021-07-13 20:18:52,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110990601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:52,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899235203] [2021-07-13 20:18:52,703 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:52,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:52,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:52,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 20:18:52,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:53,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899235203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:53,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:53,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 20:18:53,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248180352] [2021-07-13 20:18:53,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:18:53,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:53,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:18:53,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:18:53,069 INFO L87 Difference]: Start difference. First operand 137 states and 442 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:53,175 INFO L93 Difference]: Finished difference Result 96 states and 272 transitions. [2021-07-13 20:18:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:18:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:18:53,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:53,176 INFO L225 Difference]: With dead ends: 96 [2021-07-13 20:18:53,176 INFO L226 Difference]: Without dead ends: 86 [2021-07-13 20:18:53,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 362.3ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:18:53,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-13 20:18:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-07-13 20:18:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.9529411764705884) internal successors, (251), 85 states have internal predecessors, (251), 0 states have call successors, (0), 0 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 20:18:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 251 transitions. [2021-07-13 20:18:53,178 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 251 transitions. Word has length 20 [2021-07-13 20:18:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:53,178 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 251 transitions. [2021-07-13 20:18:53,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 251 transitions. [2021-07-13 20:18:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:18:53,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:53,179 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:53,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:53,379 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:53,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1129551998, now seen corresponding path program 11 times [2021-07-13 20:18:53,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:53,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935247919] [2021-07-13 20:18:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:53,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:53,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935247919] [2021-07-13 20:18:53,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935247919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:53,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061581613] [2021-07-13 20:18:53,480 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:53,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:18:53,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:53,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:18:53,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:53,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061581613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:53,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:53,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 20:18:53,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531647436] [2021-07-13 20:18:53,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:18:53,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:53,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:18:53,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:18:53,936 INFO L87 Difference]: Start difference. First operand 86 states and 251 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:53,999 INFO L93 Difference]: Finished difference Result 93 states and 262 transitions. [2021-07-13 20:18:53,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:18:53,999 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:18:53,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:54,000 INFO L225 Difference]: With dead ends: 93 [2021-07-13 20:18:54,000 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 20:18:54,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 417.6ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:18:54,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 20:18:54,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-07-13 20:18:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.929411764705882) internal successors, (249), 85 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 20:18:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 249 transitions. [2021-07-13 20:18:54,002 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 249 transitions. Word has length 21 [2021-07-13 20:18:54,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:54,002 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 249 transitions. [2021-07-13 20:18:54,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:54,002 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 249 transitions. [2021-07-13 20:18:54,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:18:54,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:54,003 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:54,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:18:54,203 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:54,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2003542752, now seen corresponding path program 12 times [2021-07-13 20:18:54,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:54,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583744825] [2021-07-13 20:18:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:54,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:54,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583744825] [2021-07-13 20:18:54,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583744825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:54,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152720668] [2021-07-13 20:18:54,281 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:54,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:18:54,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:54,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:18:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:54,497 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 7 treesize of output 3 [2021-07-13 20:18:54,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:54,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:54,530 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 7 treesize of output 3 [2021-07-13 20:18:54,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:54,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:54,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-13 20:18:54,563 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-07-13 20:18:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:54,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152720668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:54,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:54,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:18:54,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348542730] [2021-07-13 20:18:54,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:18:54,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:54,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:18:54,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:18:54,781 INFO L87 Difference]: Start difference. First operand 86 states and 249 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 20:18:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:54,852 INFO L93 Difference]: Finished difference Result 106 states and 294 transitions. [2021-07-13 20:18:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:18:54,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:18:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:54,853 INFO L225 Difference]: With dead ends: 106 [2021-07-13 20:18:54,853 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 20:18:54,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:18:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 20:18:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-07-13 20:18:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.891304347826087) internal successors, (266), 92 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 20:18:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 266 transitions. [2021-07-13 20:18:54,855 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 266 transitions. Word has length 21 [2021-07-13 20:18:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:54,855 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 266 transitions. [2021-07-13 20:18:54,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 20:18:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 266 transitions. [2021-07-13 20:18:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:18:54,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:54,856 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:55,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:18:55,072 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2021450516, now seen corresponding path program 13 times [2021-07-13 20:18:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:55,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288971994] [2021-07-13 20:18:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:55,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:55,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288971994] [2021-07-13 20:18:55,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288971994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:55,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003253646] [2021-07-13 20:18:55,208 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:55,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:18:55,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:55,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003253646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:55,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:55,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-13 20:18:55,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341348010] [2021-07-13 20:18:55,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:18:55,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:55,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:18:55,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:18:55,667 INFO L87 Difference]: Start difference. First operand 93 states and 266 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 20:18:55,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:55,870 INFO L93 Difference]: Finished difference Result 132 states and 353 transitions. [2021-07-13 20:18:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:18:55,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 22 [2021-07-13 20:18:55,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:55,880 INFO L225 Difference]: With dead ends: 132 [2021-07-13 20:18:55,880 INFO L226 Difference]: Without dead ends: 126 [2021-07-13 20:18:55,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 534.4ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:18:55,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-13 20:18:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2021-07-13 20:18:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.92) internal successors, (292), 100 states have internal predecessors, (292), 0 states have call successors, (0), 0 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 20:18:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 292 transitions. [2021-07-13 20:18:55,883 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 292 transitions. Word has length 22 [2021-07-13 20:18:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:55,883 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 292 transitions. [2021-07-13 20:18:55,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 20:18:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 292 transitions. [2021-07-13 20:18:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:18:55,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:55,883 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:56,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:56,089 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:56,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:56,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1399526026, now seen corresponding path program 14 times [2021-07-13 20:18:56,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:56,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686971791] [2021-07-13 20:18:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:56,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:56,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686971791] [2021-07-13 20:18:56,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686971791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:56,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524357981] [2021-07-13 20:18:56,166 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:56,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:18:56,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:56,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:18:56,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:56,389 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 7 treesize of output 3 [2021-07-13 20:18:56,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:56,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:56,420 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 7 treesize of output 3 [2021-07-13 20:18:56,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:18:56,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:18:56,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-13 20:18:56,451 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-07-13 20:18:56,841 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-07-13 20:18:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:18:56,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524357981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:56,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:56,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 20:18:56,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922355184] [2021-07-13 20:18:56,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:18:56,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:18:56,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:18:56,849 INFO L87 Difference]: Start difference. First operand 101 states and 292 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:57,000 INFO L93 Difference]: Finished difference Result 230 states and 668 transitions. [2021-07-13 20:18:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:18:57,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:18:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:57,001 INFO L225 Difference]: With dead ends: 230 [2021-07-13 20:18:57,001 INFO L226 Difference]: Without dead ends: 215 [2021-07-13 20:18:57,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:18:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-13 20:18:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 149. [2021-07-13 20:18:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.324324324324324) internal successors, (492), 148 states have internal predecessors, (492), 0 states have call successors, (0), 0 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 20:18:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 492 transitions. [2021-07-13 20:18:57,005 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 492 transitions. Word has length 22 [2021-07-13 20:18:57,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:57,005 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 492 transitions. [2021-07-13 20:18:57,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 492 transitions. [2021-07-13 20:18:57,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:18:57,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:57,005 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:57,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 20:18:57,212 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:57,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1718376096, now seen corresponding path program 15 times [2021-07-13 20:18:57,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:57,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287663902] [2021-07-13 20:18:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:57,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:57,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287663902] [2021-07-13 20:18:57,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287663902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:57,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469720069] [2021-07-13 20:18:57,369 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:57,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:18:57,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 20:18:57,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:57,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469720069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:57,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:57,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-13 20:18:57,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869063329] [2021-07-13 20:18:57,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:18:57,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:57,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:18:57,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:18:57,881 INFO L87 Difference]: Start difference. First operand 149 states and 492 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:58,185 INFO L93 Difference]: Finished difference Result 197 states and 539 transitions. [2021-07-13 20:18:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:18:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 20:18:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:58,186 INFO L225 Difference]: With dead ends: 197 [2021-07-13 20:18:58,186 INFO L226 Difference]: Without dead ends: 174 [2021-07-13 20:18:58,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 646.2ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:18:58,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-13 20:18:58,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 119. [2021-07-13 20:18:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 3.110169491525424) internal successors, (367), 118 states have internal predecessors, (367), 0 states have call successors, (0), 0 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 20:18:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 367 transitions. [2021-07-13 20:18:58,190 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 367 transitions. Word has length 23 [2021-07-13 20:18:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:58,190 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 367 transitions. [2021-07-13 20:18:58,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 367 transitions. [2021-07-13 20:18:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:18:58,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:58,191 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:58,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:18:58,397 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1688884076, now seen corresponding path program 16 times [2021-07-13 20:18:58,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:58,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369030739] [2021-07-13 20:18:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:18:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:58,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:18:58,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369030739] [2021-07-13 20:18:58,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369030739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:58,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817074757] [2021-07-13 20:18:58,574 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:58,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:18:58,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:18:58,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:18:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:18:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:18:59,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817074757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:18:59,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:18:59,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-13 20:18:59,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429138298] [2021-07-13 20:18:59,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:18:59,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:18:59,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:18:59,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:18:59,183 INFO L87 Difference]: Start difference. First operand 119 states and 367 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:18:59,669 INFO L93 Difference]: Finished difference Result 327 states and 811 transitions. [2021-07-13 20:18:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:18:59,670 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:18:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:18:59,671 INFO L225 Difference]: With dead ends: 327 [2021-07-13 20:18:59,671 INFO L226 Difference]: Without dead ends: 311 [2021-07-13 20:18:59,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 859.3ms TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:18:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-13 20:18:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 141. [2021-07-13 20:18:59,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.1285714285714286) internal successors, (438), 140 states have internal predecessors, (438), 0 states have call successors, (0), 0 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 20:18:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 438 transitions. [2021-07-13 20:18:59,675 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 438 transitions. Word has length 24 [2021-07-13 20:18:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:18:59,675 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 438 transitions. [2021-07-13 20:18:59,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:18:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 438 transitions. [2021-07-13 20:18:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:18:59,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:18:59,676 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:18:59,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:18:59,881 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:18:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:18:59,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1454689826, now seen corresponding path program 17 times [2021-07-13 20:18:59,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:18:59,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137071256] [2021-07-13 20:18:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:18:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:19:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:00,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:19:00,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137071256] [2021-07-13 20:19:00,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137071256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:00,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827223711] [2021-07-13 20:19:00,094 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:19:00,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:19:00,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:19:00,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 20:19:00,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:19:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:19:00,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827223711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:19:00,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:19:00,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-13 20:19:00,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970459073] [2021-07-13 20:19:00,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:19:00,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:19:00,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:19:00,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:19:00,718 INFO L87 Difference]: Start difference. First operand 141 states and 438 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:01,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:19:01,023 INFO L93 Difference]: Finished difference Result 137 states and 247 transitions. [2021-07-13 20:19:01,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:19:01,023 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:19:01,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:19:01,024 INFO L225 Difference]: With dead ends: 137 [2021-07-13 20:19:01,024 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 20:19:01,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 848.8ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:19:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 20:19:01,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 20:19:01,024 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 20:19:01,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 20:19:01,024 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-07-13 20:19:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:19:01,024 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 20:19:01,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:19:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 20:19:01,025 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 20:19:01,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:19:01,243 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:19:01,245 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:19:01 BasicIcfg [2021-07-13 20:19:01,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:19:01,245 INFO L168 Benchmark]: Toolchain (without parser) took 18032.04 ms. Allocated memory was 198.2 MB in the beginning and 325.1 MB in the end (delta: 126.9 MB). Free memory was 178.2 MB in the beginning and 285.8 MB in the end (delta: -107.6 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:19:01,245 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 198.2 MB. Free memory is still 179.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:19:01,246 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.88 ms. Allocated memory is still 198.2 MB. Free memory was 178.1 MB in the beginning and 176.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:19:01,246 INFO L168 Benchmark]: Boogie Preprocessor took 23.67 ms. Allocated memory is still 198.2 MB. Free memory was 176.6 MB in the beginning and 175.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:19:01,246 INFO L168 Benchmark]: RCFGBuilder took 399.60 ms. Allocated memory is still 198.2 MB. Free memory was 175.4 MB in the beginning and 179.8 MB in the end (delta: -4.3 MB). Peak memory consumption was 28.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:19:01,246 INFO L168 Benchmark]: TraceAbstraction took 17583.78 ms. Allocated memory was 198.2 MB in the beginning and 325.1 MB in the end (delta: 126.9 MB). Free memory was 179.2 MB in the beginning and 285.8 MB in the end (delta: -106.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-07-13 20:19:01,246 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 0.09 ms. Allocated memory is still 198.2 MB. Free memory is still 179.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.88 ms. Allocated memory is still 198.2 MB. Free memory was 178.1 MB in the beginning and 176.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.67 ms. Allocated memory is still 198.2 MB. Free memory was 176.6 MB in the beginning and 175.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 399.60 ms. Allocated memory is still 198.2 MB. Free memory was 175.4 MB in the beginning and 179.8 MB in the end (delta: -4.3 MB). Peak memory consumption was 28.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17583.78 ms. Allocated memory was 198.2 MB in the beginning and 325.1 MB in the end (delta: 126.9 MB). Free memory was 179.2 MB in the beginning and 285.8 MB in the end (delta: -106.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 125]: 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, 27 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17506.7ms, OverallIterations: 27, TraceHistogramMax: 7, EmptinessCheckTime: 17.7ms, AutomataDifference: 3206.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 602 SDtfs, 1120 SDslu, 4572 SDs, 0 SdLazy, 2230 SolverSat, 202 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1185.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 650 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 6926.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=24, InterpolantAutomatonStates: 247, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 94.3ms AutomataMinimizationTime, 27 MinimizatonAttempts, 829 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 147.0ms SsaConstructionTime, 432.8ms SatisfiabilityAnalysisTime, 8014.8ms InterpolantComputationTime, 904 NumberOfCodeBlocks, 904 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 854 ConstructedInterpolants, 23 QuantifiedInterpolants, 9864 SizeOfPredicates, 191 NumberOfNonLiveVariables, 1161 ConjunctsInSsa, 294 ConjunctsInUnsatCore, 50 InterpolantComputations, 4 PerfectInterpolantSequences, 169/656 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...