/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 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:31:05,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:31:05,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:31:05,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:31:05,802 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 [2021-06-12 21:31:05,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:31:05,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:31:05,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:31:05,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:31:05,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:31:05,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:31:05,840 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:31:05,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:31:05,840 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:31:05,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:31:05,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:31:05,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:31:05,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:31:05,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:31:05,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:31:05,842 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:31:05,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:31:05,842 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:31:05,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:31:05,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:31:05,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:31:05,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:31:05,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:31:05,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:31:05,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:31:05,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:31:05,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:31:05,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:31:05,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:31:05,844 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:31:05,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:31:05,844 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:31:06,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:31:06,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:31:06,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:31:06,187 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:31:06,188 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:31:06,188 INFO L432 ainManager$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 [2021-06-12 21:31:06,189 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl' [2021-06-12 21:31:06,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:31:06,250 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:31:06,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:31:06,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:31:06,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:31:06,265 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 12.06 09:31:06" (1/1) ... [2021-06-12 21:31:06,274 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 12.06 09:31:06" (1/1) ... [2021-06-12 21:31:06,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:31:06,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:31:06,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:31:06,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:31:06,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:06" (1/1) ... [2021-06-12 21:31:06,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:06" (1/1) ... [2021-06-12 21:31:06,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:06" (1/1) ... [2021-06-12 21:31:06,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:06" (1/1) ... [2021-06-12 21:31:06,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:06" (1/1) ... [2021-06-12 21:31:06,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:06" (1/1) ... [2021-06-12 21:31:06,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:06" (1/1) ... [2021-06-12 21:31:06,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:31:06,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:31:06,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:31:06,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:31:06,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:06" (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 [2021-06-12 21:31:06,380 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:31:06,380 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:31:06,380 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:31:06,381 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:31:06,381 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:31:06,381 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:31:06,381 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:31:06,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:31:06,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:31:06,381 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 21:31:06,383 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 21:31:06,383 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 21:31:06,384 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:31:06,853 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:31:06,853 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-12 21:31:06,854 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-12 21:31:06,854 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-12 21:31:06,854 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-12 21:31:06,856 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:31:06 BoogieIcfgContainer [2021-06-12 21:31:06,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:31:06,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:31:06,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:31:06,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:31:06,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:06" (1/2) ... [2021-06-12 21:31:06,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@143fd747 and model type commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:31:06, skipping insertion in model container [2021-06-12 21:31:06,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:31:06" (2/2) ... [2021-06-12 21:31:06,868 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.bpl [2021-06-12 21:31:06,872 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:31:06,873 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:31:06,873 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:31:06,873 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:31:06,918 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 21:31:06,953 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 21:31:06,990 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:31:06,990 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:31:06,990 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:31:06,990 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:31:06,990 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:31:06,991 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:31:06,991 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:31:06,991 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:31:06,999 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 64 flow [2021-06-12 21:31:07,010 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:31:07,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 21:31:07,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:07,018 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:07,019 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:07,028 INFO L82 PathProgramCache]: Analyzing trace with hash -628206710, now seen corresponding path program 1 times [2021-06-12 21:31:07,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:07,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871735242] [2021-06-12 21:31:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:07,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:07,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871735242] [2021-06-12 21:31:07,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871735242] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:07,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:07,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:31:07,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215037847] [2021-06-12 21:31:07,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:31:07,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:07,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:31:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:07,173 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 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) [2021-06-12 21:31:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:07,208 INFO L93 Difference]: Finished difference Result 46 states and 118 transitions. [2021-06-12 21:31:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:07,209 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 [2021-06-12 21:31:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:07,218 INFO L225 Difference]: With dead ends: 46 [2021-06-12 21:31:07,218 INFO L226 Difference]: Without dead ends: 42 [2021-06-12 21:31:07,219 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-12 21:31:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-06-12 21:31:07,254 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) [2021-06-12 21:31:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 109 transitions. [2021-06-12 21:31:07,257 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 109 transitions. Word has length 12 [2021-06-12 21:31:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:07,258 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 109 transitions. [2021-06-12 21:31:07,258 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) [2021-06-12 21:31:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 109 transitions. [2021-06-12 21:31:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 21:31:07,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:07,261 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:07,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:31:07,261 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:07,262 INFO L82 PathProgramCache]: Analyzing trace with hash 402586222, now seen corresponding path program 1 times [2021-06-12 21:31:07,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:07,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936091238] [2021-06-12 21:31:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:07,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:07,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936091238] [2021-06-12 21:31:07,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936091238] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:07,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:07,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:31:07,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851056138] [2021-06-12 21:31:07,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:31:07,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:07,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:31:07,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:07,307 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) [2021-06-12 21:31:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:07,315 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2021-06-12 21:31:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:07,316 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 [2021-06-12 21:31:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:07,317 INFO L225 Difference]: With dead ends: 59 [2021-06-12 21:31:07,317 INFO L226 Difference]: Without dead ends: 57 [2021-06-12 21:31:07,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-06-12 21:31:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-06-12 21:31:07,326 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) [2021-06-12 21:31:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 115 transitions. [2021-06-12 21:31:07,327 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 115 transitions. Word has length 13 [2021-06-12 21:31:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:07,328 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 115 transitions. [2021-06-12 21:31:07,328 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) [2021-06-12 21:31:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 115 transitions. [2021-06-12 21:31:07,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 21:31:07,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:07,329 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:07,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 21:31:07,329 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:07,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1959261122, now seen corresponding path program 1 times [2021-06-12 21:31:07,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:07,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796911432] [2021-06-12 21:31:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:07,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:07,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796911432] [2021-06-12 21:31:07,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796911432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:07,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356035802] [2021-06-12 21:31:07,407 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 [2021-06-12 21:31:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:07,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 21:31:07,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:07,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356035802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:07,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:07,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-12 21:31:07,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609288018] [2021-06-12 21:31:07,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:31:07,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:07,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:31:07,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:31:07,604 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) [2021-06-12 21:31:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:07,635 INFO L93 Difference]: Finished difference Result 65 states and 168 transitions. [2021-06-12 21:31:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:07,636 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 [2021-06-12 21:31:07,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:07,640 INFO L225 Difference]: With dead ends: 65 [2021-06-12 21:31:07,640 INFO L226 Difference]: Without dead ends: 59 [2021-06-12 21:31:07,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:31:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-12 21:31:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-06-12 21:31:07,650 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) [2021-06-12 21:31:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 141 transitions. [2021-06-12 21:31:07,651 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 141 transitions. Word has length 13 [2021-06-12 21:31:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:07,652 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 141 transitions. [2021-06-12 21:31:07,652 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) [2021-06-12 21:31:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 141 transitions. [2021-06-12 21:31:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 21:31:07,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:07,653 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:07,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 21:31:07,854 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:07,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:07,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1085270368, now seen corresponding path program 1 times [2021-06-12 21:31:07,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:07,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820166190] [2021-06-12 21:31:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:07,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:07,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820166190] [2021-06-12 21:31:07,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820166190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:07,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120760349] [2021-06-12 21:31:07,888 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 [2021-06-12 21:31:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:07,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 21:31:07,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:08,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120760349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:08,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:08,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-12 21:31:08,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213045028] [2021-06-12 21:31:08,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 21:31:08,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:08,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 21:31:08,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:31:08,011 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) [2021-06-12 21:31:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:08,034 INFO L93 Difference]: Finished difference Result 68 states and 170 transitions. [2021-06-12 21:31:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:08,035 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 [2021-06-12 21:31:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:08,037 INFO L225 Difference]: With dead ends: 68 [2021-06-12 21:31:08,037 INFO L226 Difference]: Without dead ends: 49 [2021-06-12 21:31:08,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 21:31:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-12 21:31:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-06-12 21:31:08,045 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) [2021-06-12 21:31:08,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 126 transitions. [2021-06-12 21:31:08,048 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 126 transitions. Word has length 13 [2021-06-12 21:31:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:08,048 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 126 transitions. [2021-06-12 21:31:08,048 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) [2021-06-12 21:31:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 126 transitions. [2021-06-12 21:31:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 21:31:08,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:08,050 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:08,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:08,264 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:08,264 INFO L82 PathProgramCache]: Analyzing trace with hash -242961336, now seen corresponding path program 1 times [2021-06-12 21:31:08,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:08,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129774089] [2021-06-12 21:31:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:08,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129774089] [2021-06-12 21:31:08,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129774089] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:08,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:08,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 21:31:08,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815800379] [2021-06-12 21:31:08,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:31:08,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:08,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:31:08,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:08,309 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) [2021-06-12 21:31:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:08,321 INFO L93 Difference]: Finished difference Result 29 states and 63 transitions. [2021-06-12 21:31:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:08,321 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 [2021-06-12 21:31:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:08,322 INFO L225 Difference]: With dead ends: 29 [2021-06-12 21:31:08,322 INFO L226 Difference]: Without dead ends: 28 [2021-06-12 21:31:08,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-12 21:31:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-12 21:31:08,326 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) [2021-06-12 21:31:08,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 62 transitions. [2021-06-12 21:31:08,326 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 62 transitions. Word has length 14 [2021-06-12 21:31:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:08,327 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 62 transitions. [2021-06-12 21:31:08,327 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) [2021-06-12 21:31:08,327 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 62 transitions. [2021-06-12 21:31:08,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 21:31:08,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:08,329 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:08,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 21:31:08,330 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:08,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:08,330 INFO L82 PathProgramCache]: Analyzing trace with hash -757524308, now seen corresponding path program 1 times [2021-06-12 21:31:08,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:08,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563847045] [2021-06-12 21:31:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:08,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:08,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563847045] [2021-06-12 21:31:08,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563847045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:08,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303188130] [2021-06-12 21:31:08,402 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 [2021-06-12 21:31:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:08,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:31:08,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:08,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303188130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:08,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:08,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-12 21:31:08,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149707038] [2021-06-12 21:31:08,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:31:08,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:08,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:31:08,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:31:08,545 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) [2021-06-12 21:31:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:08,585 INFO L93 Difference]: Finished difference Result 47 states and 113 transitions. [2021-06-12 21:31:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 21:31:08,586 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 [2021-06-12 21:31:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:08,586 INFO L225 Difference]: With dead ends: 47 [2021-06-12 21:31:08,587 INFO L226 Difference]: Without dead ends: 43 [2021-06-12 21:31:08,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:31:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-12 21:31:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-06-12 21:31:08,589 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) [2021-06-12 21:31:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 103 transitions. [2021-06-12 21:31:08,590 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 103 transitions. Word has length 14 [2021-06-12 21:31:08,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:08,590 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 103 transitions. [2021-06-12 21:31:08,590 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) [2021-06-12 21:31:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 103 transitions. [2021-06-12 21:31:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 21:31:08,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:08,591 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:08,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:08,814 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:08,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1436036254, now seen corresponding path program 1 times [2021-06-12 21:31:08,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:08,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000751447] [2021-06-12 21:31:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:08,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:08,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000751447] [2021-06-12 21:31:08,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000751447] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:08,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:08,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:31:08,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699855605] [2021-06-12 21:31:08,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 21:31:08,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:08,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 21:31:08,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:31:08,880 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) [2021-06-12 21:31:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:08,888 INFO L93 Difference]: Finished difference Result 60 states and 135 transitions. [2021-06-12 21:31:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:31:08,889 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 [2021-06-12 21:31:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:08,889 INFO L225 Difference]: With dead ends: 60 [2021-06-12 21:31:08,889 INFO L226 Difference]: Without dead ends: 58 [2021-06-12 21:31:08,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:31:08,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-12 21:31:08,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-06-12 21:31:08,893 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) [2021-06-12 21:31:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2021-06-12 21:31:08,894 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2021-06-12 21:31:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:08,894 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2021-06-12 21:31:08,894 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) [2021-06-12 21:31:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2021-06-12 21:31:08,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 21:31:08,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:08,894 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:08,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 21:31:08,895 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash -2049584416, now seen corresponding path program 2 times [2021-06-12 21:31:08,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:08,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564911373] [2021-06-12 21:31:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:08,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:08,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564911373] [2021-06-12 21:31:08,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564911373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:08,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88512798] [2021-06-12 21:31:08,987 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 [2021-06-12 21:31:09,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:09,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:31:09,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:09,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88512798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:09,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:09,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-12 21:31:09,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32288121] [2021-06-12 21:31:09,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:31:09,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:09,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:31:09,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:31:09,135 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) [2021-06-12 21:31:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:09,208 INFO L93 Difference]: Finished difference Result 77 states and 188 transitions. [2021-06-12 21:31:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:31:09,209 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 [2021-06-12 21:31:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:09,209 INFO L225 Difference]: With dead ends: 77 [2021-06-12 21:31:09,210 INFO L226 Difference]: Without dead ends: 67 [2021-06-12 21:31:09,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:31:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-12 21:31:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-06-12 21:31:09,215 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) [2021-06-12 21:31:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 129 transitions. [2021-06-12 21:31:09,216 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 129 transitions. Word has length 15 [2021-06-12 21:31:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:09,216 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 129 transitions. [2021-06-12 21:31:09,216 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) [2021-06-12 21:31:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 129 transitions. [2021-06-12 21:31:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 21:31:09,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:09,219 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:09,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:09,433 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash 833536548, now seen corresponding path program 3 times [2021-06-12 21:31:09,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:09,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103069900] [2021-06-12 21:31:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:09,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:09,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103069900] [2021-06-12 21:31:09,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103069900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:09,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962645485] [2021-06-12 21:31:09,503 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 [2021-06-12 21:31:09,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 21:31:09,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:09,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:31:09,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:09,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962645485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:09,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:09,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-12 21:31:09,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771453349] [2021-06-12 21:31:09,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:31:09,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:31:09,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:31:09,737 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) [2021-06-12 21:31:09,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:09,838 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2021-06-12 21:31:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:31:09,839 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 [2021-06-12 21:31:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:09,840 INFO L225 Difference]: With dead ends: 80 [2021-06-12 21:31:09,840 INFO L226 Difference]: Without dead ends: 71 [2021-06-12 21:31:09,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:31:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-12 21:31:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2021-06-12 21:31:09,853 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) [2021-06-12 21:31:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 151 transitions. [2021-06-12 21:31:09,854 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 151 transitions. Word has length 15 [2021-06-12 21:31:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:09,854 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 151 transitions. [2021-06-12 21:31:09,854 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) [2021-06-12 21:31:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 151 transitions. [2021-06-12 21:31:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 21:31:09,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:09,858 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:10,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:10,082 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:10,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:10,083 INFO L82 PathProgramCache]: Analyzing trace with hash 36878570, now seen corresponding path program 2 times [2021-06-12 21:31:10,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:10,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260773647] [2021-06-12 21:31:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:10,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:10,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260773647] [2021-06-12 21:31:10,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260773647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:10,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952439099] [2021-06-12 21:31:10,166 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 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 [2021-06-12 21:31:10,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:10,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:10,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:31:10,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:10,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952439099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:10,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:10,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-12 21:31:10,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250095889] [2021-06-12 21:31:10,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:31:10,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:10,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:31:10,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:31:10,492 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) [2021-06-12 21:31:10,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:10,702 INFO L93 Difference]: Finished difference Result 118 states and 329 transitions. [2021-06-12 21:31:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:31:10,703 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 [2021-06-12 21:31:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:10,704 INFO L225 Difference]: With dead ends: 118 [2021-06-12 21:31:10,704 INFO L226 Difference]: Without dead ends: 114 [2021-06-12 21:31:10,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:31:10,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-12 21:31:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-06-12 21:31:10,714 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) [2021-06-12 21:31:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 227 transitions. [2021-06-12 21:31:10,716 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 227 transitions. Word has length 16 [2021-06-12 21:31:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:10,716 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 227 transitions. [2021-06-12 21:31:10,716 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) [2021-06-12 21:31:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 227 transitions. [2021-06-12 21:31:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 21:31:10,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:10,717 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:10,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:10,940 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:10,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:10,941 INFO L82 PathProgramCache]: Analyzing trace with hash 846225196, now seen corresponding path program 4 times [2021-06-12 21:31:10,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:10,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881789445] [2021-06-12 21:31:10,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:11,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:11,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881789445] [2021-06-12 21:31:11,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881789445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:11,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473147599] [2021-06-12 21:31:11,051 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 [2021-06-12 21:31:11,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:31:11,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:11,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:31:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:11,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473147599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:11,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:11,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-12 21:31:11,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484889908] [2021-06-12 21:31:11,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:31:11,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:11,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:31:11,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:31:11,173 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) [2021-06-12 21:31:11,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:11,256 INFO L93 Difference]: Finished difference Result 80 states and 225 transitions. [2021-06-12 21:31:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 21:31:11,257 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 [2021-06-12 21:31:11,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:11,258 INFO L225 Difference]: With dead ends: 80 [2021-06-12 21:31:11,258 INFO L226 Difference]: Without dead ends: 77 [2021-06-12 21:31:11,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-12 21:31:11,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-06-12 21:31:11,264 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) [2021-06-12 21:31:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 209 transitions. [2021-06-12 21:31:11,265 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 209 transitions. Word has length 16 [2021-06-12 21:31:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:11,266 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 209 transitions. [2021-06-12 21:31:11,266 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) [2021-06-12 21:31:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 209 transitions. [2021-06-12 21:31:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 21:31:11,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:11,268 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:11,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 21:31:11,481 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash 292721696, now seen corresponding path program 3 times [2021-06-12 21:31:11,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:11,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259785607] [2021-06-12 21:31:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:11,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:11,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259785607] [2021-06-12 21:31:11,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259785607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:11,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004673239] [2021-06-12 21:31:11,553 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 [2021-06-12 21:31:11,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:31:11,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:11,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:31:11,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:11,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004673239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:11,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:11,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-12 21:31:11,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869091168] [2021-06-12 21:31:11,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:31:11,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:11,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:31:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:31:11,825 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) [2021-06-12 21:31:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:11,994 INFO L93 Difference]: Finished difference Result 130 states and 354 transitions. [2021-06-12 21:31:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:31:11,994 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 [2021-06-12 21:31:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:11,995 INFO L225 Difference]: With dead ends: 130 [2021-06-12 21:31:11,995 INFO L226 Difference]: Without dead ends: 126 [2021-06-12 21:31:11,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:31:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-12 21:31:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2021-06-12 21:31:11,998 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) [2021-06-12 21:31:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 246 transitions. [2021-06-12 21:31:11,999 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 246 transitions. Word has length 17 [2021-06-12 21:31:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:11,999 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 246 transitions. [2021-06-12 21:31:11,999 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) [2021-06-12 21:31:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 246 transitions. [2021-06-12 21:31:11,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 21:31:11,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:12,000 INFO L472 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:12,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 21:31:12,213 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:12,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:12,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1102068322, now seen corresponding path program 4 times [2021-06-12 21:31:12,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:12,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423786275] [2021-06-12 21:31:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:12,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:12,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423786275] [2021-06-12 21:31:12,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423786275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:12,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801849218] [2021-06-12 21:31:12,303 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 [2021-06-12 21:31:12,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:31:12,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:12,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:31:12,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:12,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801849218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:12,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:12,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-12 21:31:12,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396757904] [2021-06-12 21:31:12,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:31:12,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:12,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:31:12,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:31:12,501 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) [2021-06-12 21:31:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:12,661 INFO L93 Difference]: Finished difference Result 94 states and 267 transitions. [2021-06-12 21:31:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:31:12,662 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 [2021-06-12 21:31:12,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:12,664 INFO L225 Difference]: With dead ends: 94 [2021-06-12 21:31:12,664 INFO L226 Difference]: Without dead ends: 93 [2021-06-12 21:31:12,664 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-12 21:31:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2021-06-12 21:31:12,667 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) [2021-06-12 21:31:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 247 transitions. [2021-06-12 21:31:12,668 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 247 transitions. Word has length 17 [2021-06-12 21:31:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:12,668 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 247 transitions. [2021-06-12 21:31:12,668 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) [2021-06-12 21:31:12,668 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 247 transitions. [2021-06-12 21:31:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 21:31:12,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:12,669 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:12,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:12,884 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:12,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1878688318, now seen corresponding path program 5 times [2021-06-12 21:31:12,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:12,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690100320] [2021-06-12 21:31:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:12,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:12,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690100320] [2021-06-12 21:31:12,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690100320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:12,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266901423] [2021-06-12 21:31:12,949 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 [2021-06-12 21:31:12,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:31:12,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:12,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:31:12,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:13,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266901423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:13,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:13,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 21:31:13,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857836046] [2021-06-12 21:31:13,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:31:13,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:13,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:31:13,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:31:13,110 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) [2021-06-12 21:31:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:13,136 INFO L93 Difference]: Finished difference Result 110 states and 254 transitions. [2021-06-12 21:31:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:31:13,136 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 [2021-06-12 21:31:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:13,137 INFO L225 Difference]: With dead ends: 110 [2021-06-12 21:31:13,137 INFO L226 Difference]: Without dead ends: 98 [2021-06-12 21:31:13,137 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:31:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-12 21:31:13,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2021-06-12 21:31:13,140 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) [2021-06-12 21:31:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 179 transitions. [2021-06-12 21:31:13,140 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 179 transitions. Word has length 17 [2021-06-12 21:31:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:13,140 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 179 transitions. [2021-06-12 21:31:13,140 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) [2021-06-12 21:31:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 179 transitions. [2021-06-12 21:31:13,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:31:13,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:13,141 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:13,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:13,364 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:13,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:13,364 INFO L82 PathProgramCache]: Analyzing trace with hash -366075990, now seen corresponding path program 5 times [2021-06-12 21:31:13,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:13,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718654236] [2021-06-12 21:31:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:13,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:13,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718654236] [2021-06-12 21:31:13,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718654236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:13,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489083470] [2021-06-12 21:31:13,445 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 [2021-06-12 21:31:13,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:31:13,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:13,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:31:13,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:13,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489083470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:13,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:13,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-12 21:31:13,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405124771] [2021-06-12 21:31:13,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:31:13,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:13,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:31:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:13,685 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) [2021-06-12 21:31:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:13,809 INFO L93 Difference]: Finished difference Result 190 states and 501 transitions. [2021-06-12 21:31:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:31:13,810 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 [2021-06-12 21:31:13,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:13,811 INFO L225 Difference]: With dead ends: 190 [2021-06-12 21:31:13,811 INFO L226 Difference]: Without dead ends: 176 [2021-06-12 21:31:13,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-12 21:31:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 106. [2021-06-12 21:31:13,832 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) [2021-06-12 21:31:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 329 transitions. [2021-06-12 21:31:13,832 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 329 transitions. Word has length 18 [2021-06-12 21:31:13,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:13,833 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 329 transitions. [2021-06-12 21:31:13,833 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) [2021-06-12 21:31:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 329 transitions. [2021-06-12 21:31:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:31:13,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:13,833 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:14,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 21:31:14,056 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:14,056 INFO L82 PathProgramCache]: Analyzing trace with hash 443270636, now seen corresponding path program 6 times [2021-06-12 21:31:14,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:14,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405788569] [2021-06-12 21:31:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:14,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:14,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405788569] [2021-06-12 21:31:14,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405788569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:14,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919589262] [2021-06-12 21:31:14,162 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 [2021-06-12 21:31:14,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:31:14,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:14,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 21:31:14,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:14,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919589262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:14,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:14,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 21:31:14,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239061976] [2021-06-12 21:31:14,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:31:14,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:14,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:31:14,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:31:14,390 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) [2021-06-12 21:31:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:14,477 INFO L93 Difference]: Finished difference Result 120 states and 354 transitions. [2021-06-12 21:31:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:31:14,478 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 [2021-06-12 21:31:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:14,479 INFO L225 Difference]: With dead ends: 120 [2021-06-12 21:31:14,479 INFO L226 Difference]: Without dead ends: 113 [2021-06-12 21:31:14,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:31:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-12 21:31:14,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-06-12 21:31:14,485 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) [2021-06-12 21:31:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 332 transitions. [2021-06-12 21:31:14,485 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 332 transitions. Word has length 18 [2021-06-12 21:31:14,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:14,486 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 332 transitions. [2021-06-12 21:31:14,486 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) [2021-06-12 21:31:14,486 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 332 transitions. [2021-06-12 21:31:14,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 21:31:14,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:14,489 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:14,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:14,709 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:14,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:14,710 INFO L82 PathProgramCache]: Analyzing trace with hash 5973854, now seen corresponding path program 7 times [2021-06-12 21:31:14,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:14,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939233604] [2021-06-12 21:31:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:14,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:14,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939233604] [2021-06-12 21:31:14,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939233604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:14,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571900791] [2021-06-12 21:31:14,812 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 [2021-06-12 21:31:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:14,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 21:31:14,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:15,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571900791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:15,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:15,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-12 21:31:15,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760598429] [2021-06-12 21:31:15,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:31:15,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:15,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:31:15,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:31:15,176 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) [2021-06-12 21:31:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:15,325 INFO L93 Difference]: Finished difference Result 60 states and 141 transitions. [2021-06-12 21:31:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:31:15,325 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 [2021-06-12 21:31:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:15,326 INFO L225 Difference]: With dead ends: 60 [2021-06-12 21:31:15,326 INFO L226 Difference]: Without dead ends: 56 [2021-06-12 21:31:15,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 378.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-12 21:31:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-06-12 21:31:15,327 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) [2021-06-12 21:31:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 134 transitions. [2021-06-12 21:31:15,328 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 134 transitions. Word has length 19 [2021-06-12 21:31:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:15,328 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 134 transitions. [2021-06-12 21:31:15,328 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) [2021-06-12 21:31:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 134 transitions. [2021-06-12 21:31:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 21:31:15,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:15,329 INFO L472 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:15,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 21:31:15,553 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash 815320480, now seen corresponding path program 8 times [2021-06-12 21:31:15,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:15,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402398868] [2021-06-12 21:31:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:15,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:15,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402398868] [2021-06-12 21:31:15,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402398868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:15,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913911401] [2021-06-12 21:31:15,658 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 [2021-06-12 21:31:15,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:15,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:15,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:31:15,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:16,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913911401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:16,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:16,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 21:31:16,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943821870] [2021-06-12 21:31:16,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:31:16,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:16,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:31:16,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:31:16,062 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) [2021-06-12 21:31:16,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:16,248 INFO L93 Difference]: Finished difference Result 71 states and 176 transitions. [2021-06-12 21:31:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:31:16,249 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 [2021-06-12 21:31:16,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:16,249 INFO L225 Difference]: With dead ends: 71 [2021-06-12 21:31:16,249 INFO L226 Difference]: Without dead ends: 67 [2021-06-12 21:31:16,249 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 428.8ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:31:16,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-12 21:31:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-06-12 21:31:16,251 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) [2021-06-12 21:31:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 159 transitions. [2021-06-12 21:31:16,252 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 159 transitions. Word has length 19 [2021-06-12 21:31:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:16,252 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 159 transitions. [2021-06-12 21:31:16,252 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) [2021-06-12 21:31:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 159 transitions. [2021-06-12 21:31:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:16,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:16,253 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:16,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:16,473 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:16,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:16,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1345382870, now seen corresponding path program 9 times [2021-06-12 21:31:16,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:16,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057334418] [2021-06-12 21:31:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:16,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:16,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057334418] [2021-06-12 21:31:16,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057334418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:16,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990647053] [2021-06-12 21:31:16,580 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 [2021-06-12 21:31:16,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:31:16,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:16,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:31:16,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:16,877 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 [2021-06-12 21:31:16,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:16,882 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 [2021-06-12 21:31:16,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:16,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:16,915 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. [2021-06-12 21:31:16,916 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-12 21:31:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:17,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990647053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:17,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:17,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-12 21:31:17,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744747359] [2021-06-12 21:31:17,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:31:17,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:31:17,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:17,015 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) [2021-06-12 21:31:17,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:17,393 INFO L93 Difference]: Finished difference Result 392 states and 980 transitions. [2021-06-12 21:31:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:31:17,393 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 [2021-06-12 21:31:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:17,396 INFO L225 Difference]: With dead ends: 392 [2021-06-12 21:31:17,396 INFO L226 Difference]: Without dead ends: 370 [2021-06-12 21:31:17,396 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:31:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-12 21:31:17,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 137. [2021-06-12 21:31:17,402 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) [2021-06-12 21:31:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 442 transitions. [2021-06-12 21:31:17,402 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 442 transitions. Word has length 20 [2021-06-12 21:31:17,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:17,403 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 442 transitions. [2021-06-12 21:31:17,403 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) [2021-06-12 21:31:17,403 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 442 transitions. [2021-06-12 21:31:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:17,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:17,403 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:17,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 21:31:17,617 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:17,617 INFO L82 PathProgramCache]: Analyzing trace with hash -536036244, now seen corresponding path program 10 times [2021-06-12 21:31:17,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:17,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637406980] [2021-06-12 21:31:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:17,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:17,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637406980] [2021-06-12 21:31:17,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637406980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:17,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156603987] [2021-06-12 21:31:17,744 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 [2021-06-12 21:31:17,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:31:17,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 21:31:17,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:18,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156603987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:18,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:18,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 21:31:18,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868636125] [2021-06-12 21:31:18,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:31:18,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:18,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:31:18,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:31:18,163 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) [2021-06-12 21:31:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:18,312 INFO L93 Difference]: Finished difference Result 96 states and 272 transitions. [2021-06-12 21:31:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:31:18,313 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 [2021-06-12 21:31:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:18,313 INFO L225 Difference]: With dead ends: 96 [2021-06-12 21:31:18,313 INFO L226 Difference]: Without dead ends: 86 [2021-06-12 21:31:18,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:31:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-12 21:31:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-06-12 21:31:18,316 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) [2021-06-12 21:31:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 251 transitions. [2021-06-12 21:31:18,316 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 251 transitions. Word has length 20 [2021-06-12 21:31:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:18,316 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 251 transitions. [2021-06-12 21:31:18,316 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) [2021-06-12 21:31:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 251 transitions. [2021-06-12 21:31:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:31:18,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:18,317 INFO L472 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:18,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:18,518 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:18,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1129551998, now seen corresponding path program 11 times [2021-06-12 21:31:18,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:18,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282857923] [2021-06-12 21:31:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:18,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:18,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282857923] [2021-06-12 21:31:18,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282857923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:18,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525443758] [2021-06-12 21:31:18,742 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 [2021-06-12 21:31:18,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:31:18,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:31:18,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:19,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525443758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:19,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:19,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-12 21:31:19,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913950443] [2021-06-12 21:31:19,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:31:19,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:19,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:31:19,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:31:19,226 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) [2021-06-12 21:31:19,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:19,306 INFO L93 Difference]: Finished difference Result 93 states and 262 transitions. [2021-06-12 21:31:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:31:19,306 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 [2021-06-12 21:31:19,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:19,307 INFO L225 Difference]: With dead ends: 93 [2021-06-12 21:31:19,307 INFO L226 Difference]: Without dead ends: 91 [2021-06-12 21:31:19,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 459.7ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:31:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-12 21:31:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-06-12 21:31:19,310 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) [2021-06-12 21:31:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 249 transitions. [2021-06-12 21:31:19,310 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 249 transitions. Word has length 21 [2021-06-12 21:31:19,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:19,311 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 249 transitions. [2021-06-12 21:31:19,311 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) [2021-06-12 21:31:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 249 transitions. [2021-06-12 21:31:19,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 21:31:19,311 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:19,311 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:19,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 21:31:19,518 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:19,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:19,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2003542752, now seen corresponding path program 12 times [2021-06-12 21:31:19,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:19,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133664037] [2021-06-12 21:31:19,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:19,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:19,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133664037] [2021-06-12 21:31:19,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133664037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:19,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119000696] [2021-06-12 21:31:19,655 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 [2021-06-12 21:31:19,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:31:19,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:19,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 21:31:19,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:19,954 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 [2021-06-12 21:31:19,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:19,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:19,994 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 [2021-06-12 21:31:19,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:20,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:20,033 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. [2021-06-12 21:31:20,034 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-06-12 21:31:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:20,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119000696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:20,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:20,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 21:31:20,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086738769] [2021-06-12 21:31:20,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:31:20,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:31:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:31:20,263 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) [2021-06-12 21:31:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:20,339 INFO L93 Difference]: Finished difference Result 106 states and 294 transitions. [2021-06-12 21:31:20,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:31:20,340 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 [2021-06-12 21:31:20,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:20,340 INFO L225 Difference]: With dead ends: 106 [2021-06-12 21:31:20,340 INFO L226 Difference]: Without dead ends: 100 [2021-06-12 21:31:20,341 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:31:20,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-12 21:31:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-06-12 21:31:20,344 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) [2021-06-12 21:31:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 266 transitions. [2021-06-12 21:31:20,344 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 266 transitions. Word has length 21 [2021-06-12 21:31:20,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:20,344 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 266 transitions. [2021-06-12 21:31:20,345 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) [2021-06-12 21:31:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 266 transitions. [2021-06-12 21:31:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:20,345 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:20,345 INFO L472 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:20,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 21:31:20,570 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:20,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:20,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2021450516, now seen corresponding path program 13 times [2021-06-12 21:31:20,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:20,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655747528] [2021-06-12 21:31:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:20,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:20,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655747528] [2021-06-12 21:31:20,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655747528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:20,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897246656] [2021-06-12 21:31:20,759 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 [2021-06-12 21:31:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 21:31:20,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:21,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897246656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:21,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:21,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 21:31:21,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795645542] [2021-06-12 21:31:21,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:31:21,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:21,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:31:21,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:31:21,397 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) [2021-06-12 21:31:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:21,642 INFO L93 Difference]: Finished difference Result 132 states and 353 transitions. [2021-06-12 21:31:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 21:31:21,649 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 [2021-06-12 21:31:21,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:21,649 INFO L225 Difference]: With dead ends: 132 [2021-06-12 21:31:21,649 INFO L226 Difference]: Without dead ends: 126 [2021-06-12 21:31:21,650 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 691.4ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:31:21,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-12 21:31:21,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2021-06-12 21:31:21,653 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) [2021-06-12 21:31:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 292 transitions. [2021-06-12 21:31:21,653 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 292 transitions. Word has length 22 [2021-06-12 21:31:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:21,653 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 292 transitions. [2021-06-12 21:31:21,654 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) [2021-06-12 21:31:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 292 transitions. [2021-06-12 21:31:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:21,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:21,654 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:21,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:21,869 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:21,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1399526026, now seen corresponding path program 14 times [2021-06-12 21:31:21,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:21,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221743552] [2021-06-12 21:31:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:21,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:21,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221743552] [2021-06-12 21:31:21,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221743552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:21,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577850397] [2021-06-12 21:31:21,985 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 [2021-06-12 21:31:22,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:22,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 21:31:22,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:22,249 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 [2021-06-12 21:31:22,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:22,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:22,286 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 [2021-06-12 21:31:22,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:22,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:22,335 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. [2021-06-12 21:31:22,335 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-06-12 21:31:24,262 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-12 21:31:25,220 WARN L205 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-06-12 21:31:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:25,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577850397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:25,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:25,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 21:31:25,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005285681] [2021-06-12 21:31:25,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:31:25,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:25,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:31:25,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:31:25,237 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) [2021-06-12 21:31:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:25,393 INFO L93 Difference]: Finished difference Result 230 states and 668 transitions. [2021-06-12 21:31:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:31:25,393 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 [2021-06-12 21:31:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:25,395 INFO L225 Difference]: With dead ends: 230 [2021-06-12 21:31:25,395 INFO L226 Difference]: Without dead ends: 215 [2021-06-12 21:31:25,395 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3047.7ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:31:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-12 21:31:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 149. [2021-06-12 21:31:25,399 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) [2021-06-12 21:31:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 492 transitions. [2021-06-12 21:31:25,400 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 492 transitions. Word has length 22 [2021-06-12 21:31:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:25,400 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 492 transitions. [2021-06-12 21:31:25,400 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) [2021-06-12 21:31:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 492 transitions. [2021-06-12 21:31:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:31:25,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:25,401 INFO L472 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:25,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 21:31:25,617 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:25,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:25,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1718376096, now seen corresponding path program 15 times [2021-06-12 21:31:25,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:25,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97169745] [2021-06-12 21:31:25,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:25,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:25,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97169745] [2021-06-12 21:31:25,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97169745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:25,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843842118] [2021-06-12 21:31:25,827 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 [2021-06-12 21:31:25,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:31:25,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:25,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:31:25,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:26,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843842118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:26,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:26,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:31:26,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692648124] [2021-06-12 21:31:26,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:31:26,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:26,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:31:26,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:31:26,390 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) [2021-06-12 21:31:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:26,723 INFO L93 Difference]: Finished difference Result 197 states and 539 transitions. [2021-06-12 21:31:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:31:26,724 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 [2021-06-12 21:31:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:26,725 INFO L225 Difference]: With dead ends: 197 [2021-06-12 21:31:26,725 INFO L226 Difference]: Without dead ends: 174 [2021-06-12 21:31:26,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 715.3ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:31:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-12 21:31:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 119. [2021-06-12 21:31:26,730 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) [2021-06-12 21:31:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 367 transitions. [2021-06-12 21:31:26,730 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 367 transitions. Word has length 23 [2021-06-12 21:31:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:26,730 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 367 transitions. [2021-06-12 21:31:26,730 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) [2021-06-12 21:31:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 367 transitions. [2021-06-12 21:31:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:31:26,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:26,731 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:26,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 21:31:26,937 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:26,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1688884076, now seen corresponding path program 16 times [2021-06-12 21:31:26,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:26,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800180213] [2021-06-12 21:31:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:27,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:27,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800180213] [2021-06-12 21:31:27,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800180213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:27,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063441324] [2021-06-12 21:31:27,122 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 [2021-06-12 21:31:27,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:31:27,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:27,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 21:31:27,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:27,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063441324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:27,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:27,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-12 21:31:27,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171945214] [2021-06-12 21:31:27,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:31:27,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:31:27,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:31:27,830 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) [2021-06-12 21:31:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:28,301 INFO L93 Difference]: Finished difference Result 327 states and 811 transitions. [2021-06-12 21:31:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:31:28,302 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 [2021-06-12 21:31:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:28,303 INFO L225 Difference]: With dead ends: 327 [2021-06-12 21:31:28,303 INFO L226 Difference]: Without dead ends: 311 [2021-06-12 21:31:28,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 983.1ms TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:31:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-12 21:31:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 141. [2021-06-12 21:31:28,309 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) [2021-06-12 21:31:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 438 transitions. [2021-06-12 21:31:28,310 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 438 transitions. Word has length 24 [2021-06-12 21:31:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:28,310 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 438 transitions. [2021-06-12 21:31:28,310 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) [2021-06-12 21:31:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 438 transitions. [2021-06-12 21:31:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 21:31:28,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:28,310 INFO L472 BasicCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:28,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:28,533 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:28,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:28,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1454689826, now seen corresponding path program 17 times [2021-06-12 21:31:28,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:28,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250931041] [2021-06-12 21:31:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:28,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:28,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250931041] [2021-06-12 21:31:28,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250931041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:28,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111413142] [2021-06-12 21:31:28,784 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 [2021-06-12 21:31:28,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:31:28,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:28,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:31:28,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:29,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111413142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:29,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:29,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-12 21:31:29,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107359832] [2021-06-12 21:31:29,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:31:29,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:29,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:31:29,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:31:29,436 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) [2021-06-12 21:31:29,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:29,818 INFO L93 Difference]: Finished difference Result 137 states and 247 transitions. [2021-06-12 21:31:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 21:31:29,818 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 [2021-06-12 21:31:29,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:29,818 INFO L225 Difference]: With dead ends: 137 [2021-06-12 21:31:29,818 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 21:31:29,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 928.2ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 21:31:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 21:31:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 21:31:29,819 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) [2021-06-12 21:31:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 21:31:29,819 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-06-12 21:31:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:29,819 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 21:31:29,819 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) [2021-06-12 21:31:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 21:31:29,820 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 21:31:30,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 21:31:30,045 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 21:31:30,047 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 09:31:30 BasicIcfg [2021-06-12 21:31:30,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 21:31:30,048 INFO L168 Benchmark]: Toolchain (without parser) took 23797.81 ms. Allocated memory was 230.7 MB in the beginning and 399.5 MB in the end (delta: 168.8 MB). Free memory was 210.5 MB in the beginning and 377.2 MB in the end (delta: -166.7 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2021-06-12 21:31:30,048 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 230.7 MB. Free memory is still 211.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:31:30,048 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.81 ms. Allocated memory is still 230.7 MB. Free memory was 210.5 MB in the beginning and 209.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:31:30,048 INFO L168 Benchmark]: Boogie Preprocessor took 28.79 ms. Allocated memory is still 230.7 MB. Free memory was 209.1 MB in the beginning and 207.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 21:31:30,048 INFO L168 Benchmark]: RCFGBuilder took 541.35 ms. Allocated memory is still 230.7 MB. Free memory was 207.9 MB in the beginning and 179.1 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. [2021-06-12 21:31:30,048 INFO L168 Benchmark]: TraceAbstraction took 23189.43 ms. Allocated memory was 230.7 MB in the beginning and 399.5 MB in the end (delta: 168.8 MB). Free memory was 178.6 MB in the beginning and 377.2 MB in the end (delta: -198.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 21:31:30,048 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 0.12 ms. Allocated memory is still 230.7 MB. Free memory is still 211.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 32.81 ms. Allocated memory is still 230.7 MB. Free memory was 210.5 MB in the beginning and 209.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.79 ms. Allocated memory is still 230.7 MB. Free memory was 209.1 MB in the beginning and 207.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 541.35 ms. Allocated memory is still 230.7 MB. Free memory was 207.9 MB in the beginning and 179.1 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23189.43 ms. Allocated memory was 230.7 MB in the beginning and 399.5 MB in the end (delta: 168.8 MB). Free memory was 178.6 MB in the beginning and 377.2 MB in the end (delta: -198.6 MB). There was no memory consumed. 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: 23054.6ms, OverallIterations: 27, TraceHistogramMax: 7, EmptinessCheckTime: 32.0ms, AutomataDifference: 3903.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 602 SDtfs, 1000 SDslu, 4887 SDs, 0 SdLazy, 2311 SolverSat, 190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1362.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 650 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 10820.1ms 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: 175.5ms AutomataMinimizationTime, 27 MinimizatonAttempts, 829 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 195.1ms SsaConstructionTime, 577.0ms SatisfiabilityAnalysisTime, 12322.6ms 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...