/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-2-semi-alt-OJ4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:47:46,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:47:46,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:47:46,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 19:47:46,289 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 19:47:46,331 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:47:46,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:47:46,332 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:47:46,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:47:46,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:47:46,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:47:46,337 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:47:46,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:47:46,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:47:46,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:47:46,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:47:46,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:47:46,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:47:46,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:47:46,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:47:46,340 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:47:46,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:47:46,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:47:46,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:47:46,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:47:46,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:47:46,341 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:47:46,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:47:46,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:47:46,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:47:46,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:47:46,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:47:46,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:47:46,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:47:46,342 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:47:46,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:47:46,342 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:47:46,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:47:46,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:47:46,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:47:46,716 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:47:46,718 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:47:46,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-2-semi-alt-OJ4.wvr.bpl [2021-02-19 19:47:46,730 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-2-semi-alt-OJ4.wvr.bpl' [2021-02-19 19:47:46,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:47:46,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:47:46,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:47:46,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:47:46,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:47:46,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:47:46" (1/1) ... [2021-02-19 19:47:46,794 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:47:46" (1/1) ... [2021-02-19 19:47:46,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:47:46,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:47:46,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:47:46,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:47:46,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:47:46" (1/1) ... [2021-02-19 19:47:46,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:47:46" (1/1) ... [2021-02-19 19:47:46,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:47:46" (1/1) ... [2021-02-19 19:47:46,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:47:46" (1/1) ... [2021-02-19 19:47:46,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:47:46" (1/1) ... [2021-02-19 19:47:46,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:47:46" (1/1) ... [2021-02-19 19:47:46,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:47:46" (1/1) ... [2021-02-19 19:47:46,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:47:46,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:47:46,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:47:46,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:47:46,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:47:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:47:46,915 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:47:46,915 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:47:46,915 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:47:46,916 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:47:46,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:47:46,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:47:46,916 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:47:46,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:47:46,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:47:46,917 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 19:47:47,178 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:47:47,178 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 19:47:47,180 INFO L202 PluginConnector]: Adding new model counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:47:47 BoogieIcfgContainer [2021-02-19 19:47:47,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:47:47,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:47:47,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:47:47,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:47:47,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:47:46" (1/2) ... [2021-02-19 19:47:47,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1baf5106 and model type counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:47:47, skipping insertion in model container [2021-02-19 19:47:47,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:47:47" (2/2) ... [2021-02-19 19:47:47,189 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-2-semi-alt-OJ4.wvr.bpl [2021-02-19 19:47:47,204 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:47:47,205 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:47:47,210 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:47:47,211 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:47:47,283 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 19:47:47,303 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 19:47:47,338 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:47:47,338 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:47:47,338 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:47:47,338 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:47:47,338 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:47:47,338 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:47:47,338 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:47:47,339 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:47:47,353 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-02-19 19:47:47,371 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 19:47:47,380 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:47,381 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:47,382 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:47,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1121195020, now seen corresponding path program 1 times [2021-02-19 19:47:47,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:47,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095132119] [2021-02-19 19:47:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:47,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095132119] [2021-02-19 19:47:47,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:47:47,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-19 19:47:47,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881950821] [2021-02-19 19:47:47,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:47:47,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:47:47,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:47:47,824 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2021-02-19 19:47:48,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:48,082 INFO L93 Difference]: Finished difference Result 67 states and 111 transitions. [2021-02-19 19:47:48,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 19:47:48,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 [2021-02-19 19:47:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:48,095 INFO L225 Difference]: With dead ends: 67 [2021-02-19 19:47:48,095 INFO L226 Difference]: Without dead ends: 52 [2021-02-19 19:47:48,098 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:47:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-19 19:47:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-02-19 19:47:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 69 transitions. [2021-02-19 19:47:48,142 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 69 transitions. Word has length 15 [2021-02-19 19:47:48,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:48,143 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 69 transitions. [2021-02-19 19:47:48,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2021-02-19 19:47:48,143 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 69 transitions. [2021-02-19 19:47:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 19:47:48,145 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:48,146 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:48,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:47:48,146 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:48,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash -471126050, now seen corresponding path program 2 times [2021-02-19 19:47:48,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:48,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690481238] [2021-02-19 19:47:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:48,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690481238] [2021-02-19 19:47:48,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:47:48,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-19 19:47:48,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162015549] [2021-02-19 19:47:48,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:47:48,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:48,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:47:48,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:47:48,361 INFO L87 Difference]: Start difference. First operand 39 states and 69 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2021-02-19 19:47:48,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:48,534 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-02-19 19:47:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 19:47:48,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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 [2021-02-19 19:47:48,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:48,536 INFO L225 Difference]: With dead ends: 50 [2021-02-19 19:47:48,537 INFO L226 Difference]: Without dead ends: 43 [2021-02-19 19:47:48,538 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:47:48,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-19 19:47:48,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-02-19 19:47:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-02-19 19:47:48,553 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-02-19 19:47:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:48,554 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-02-19 19:47:48,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 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) [2021-02-19 19:47:48,554 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-02-19 19:47:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 19:47:48,555 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:48,556 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:48,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 19:47:48,556 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:48,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:48,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1057113994, now seen corresponding path program 1 times [2021-02-19 19:47:48,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:48,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61985240] [2021-02-19 19:47:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:48,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61985240] [2021-02-19 19:47:48,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711535588] [2021-02-19 19:47:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:48,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 19:47:48,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:49,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:49,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 19:47:49,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723399022] [2021-02-19 19:47:49,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:47:49,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:49,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:47:49,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:47:49,266 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:49,688 INFO L93 Difference]: Finished difference Result 107 states and 185 transitions. [2021-02-19 19:47:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:47:49,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 19:47:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:49,697 INFO L225 Difference]: With dead ends: 107 [2021-02-19 19:47:49,699 INFO L226 Difference]: Without dead ends: 93 [2021-02-19 19:47:49,700 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:47:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-19 19:47:49,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2021-02-19 19:47:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-02-19 19:47:49,707 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-02-19 19:47:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:49,708 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-02-19 19:47:49,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-02-19 19:47:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 19:47:49,709 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:49,709 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:49,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 19:47:49,922 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:49,923 INFO L82 PathProgramCache]: Analyzing trace with hash -407045024, now seen corresponding path program 2 times [2021-02-19 19:47:49,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:49,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716913933] [2021-02-19 19:47:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:50,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716913933] [2021-02-19 19:47:50,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364403687] [2021-02-19 19:47:50,092 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:50,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:47:50,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:50,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 19:47:50,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:50,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:50,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 19:47:50,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482719634] [2021-02-19 19:47:50,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:47:50,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:50,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:47:50,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:47:50,381 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:50,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:50,809 INFO L93 Difference]: Finished difference Result 117 states and 198 transitions. [2021-02-19 19:47:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:47:50,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 19:47:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:50,812 INFO L225 Difference]: With dead ends: 117 [2021-02-19 19:47:50,813 INFO L226 Difference]: Without dead ends: 103 [2021-02-19 19:47:50,813 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:47:50,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-19 19:47:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 46. [2021-02-19 19:47:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-02-19 19:47:50,833 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-02-19 19:47:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:50,833 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-02-19 19:47:50,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-02-19 19:47:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 19:47:50,834 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:50,835 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:51,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:51,054 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:51,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1827062470, now seen corresponding path program 3 times [2021-02-19 19:47:51,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:51,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960190448] [2021-02-19 19:47:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:51,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960190448] [2021-02-19 19:47:51,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997386943] [2021-02-19 19:47:51,179 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:51,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:47:51,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:51,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 19:47:51,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:51,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:51,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 19:47:51,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975739617] [2021-02-19 19:47:51,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:47:51,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:51,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:47:51,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:47:51,453 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:51,805 INFO L93 Difference]: Finished difference Result 94 states and 156 transitions. [2021-02-19 19:47:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:47:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 19:47:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:51,808 INFO L225 Difference]: With dead ends: 94 [2021-02-19 19:47:51,808 INFO L226 Difference]: Without dead ends: 80 [2021-02-19 19:47:51,808 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:47:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-02-19 19:47:51,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-02-19 19:47:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 51 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 93 transitions. [2021-02-19 19:47:51,816 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 93 transitions. Word has length 17 [2021-02-19 19:47:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:51,817 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 93 transitions. [2021-02-19 19:47:51,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 93 transitions. [2021-02-19 19:47:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 19:47:51,820 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:51,820 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:52,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:52,034 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:52,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:52,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1291832668, now seen corresponding path program 4 times [2021-02-19 19:47:52,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:52,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060298268] [2021-02-19 19:47:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:52,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060298268] [2021-02-19 19:47:52,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682397615] [2021-02-19 19:47:52,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:52,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:47:52,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:52,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 19:47:52,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:52,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:52,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 19:47:52,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038784697] [2021-02-19 19:47:52,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 19:47:52,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 19:47:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:47:52,440 INFO L87 Difference]: Start difference. First operand 52 states and 93 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:52,739 INFO L93 Difference]: Finished difference Result 87 states and 147 transitions. [2021-02-19 19:47:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:47:52,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 19:47:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:52,741 INFO L225 Difference]: With dead ends: 87 [2021-02-19 19:47:52,741 INFO L226 Difference]: Without dead ends: 49 [2021-02-19 19:47:52,741 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:47:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-19 19:47:52,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-02-19 19:47:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-02-19 19:47:52,745 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-02-19 19:47:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:52,745 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-02-19 19:47:52,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-02-19 19:47:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:47:52,746 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:52,746 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:52,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:52,962 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:52,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1098015156, now seen corresponding path program 1 times [2021-02-19 19:47:52,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:52,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861160140] [2021-02-19 19:47:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:53,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861160140] [2021-02-19 19:47:53,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989177000] [2021-02-19 19:47:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:53,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:47:53,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:53,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:53,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:47:53,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317240407] [2021-02-19 19:47:53,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:47:53,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:53,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:47:53,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:47:53,330 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:53,642 INFO L93 Difference]: Finished difference Result 113 states and 197 transitions. [2021-02-19 19:47:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:47:53,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-02-19 19:47:53,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:53,644 INFO L225 Difference]: With dead ends: 113 [2021-02-19 19:47:53,644 INFO L226 Difference]: Without dead ends: 76 [2021-02-19 19:47:53,644 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:47:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-19 19:47:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-02-19 19:47:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.849056603773585) internal successors, (98), 53 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 98 transitions. [2021-02-19 19:47:53,652 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 98 transitions. Word has length 19 [2021-02-19 19:47:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:53,652 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 98 transitions. [2021-02-19 19:47:53,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 98 transitions. [2021-02-19 19:47:53,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:47:53,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:53,653 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:53,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-02-19 19:47:53,866 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:53,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:53,867 INFO L82 PathProgramCache]: Analyzing trace with hash -166912704, now seen corresponding path program 2 times [2021-02-19 19:47:53,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:53,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372390167] [2021-02-19 19:47:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:53,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372390167] [2021-02-19 19:47:53,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215602800] [2021-02-19 19:47:53,988 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) [2021-02-19 19:47:54,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:47:54,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:54,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 19:47:54,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:54,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:54,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:47:54,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067839939] [2021-02-19 19:47:54,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:47:54,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:54,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:47:54,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:47:54,263 INFO L87 Difference]: Start difference. First operand 54 states and 98 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:54,641 INFO L93 Difference]: Finished difference Result 120 states and 202 transitions. [2021-02-19 19:47:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:47:54,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-02-19 19:47:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:54,643 INFO L225 Difference]: With dead ends: 120 [2021-02-19 19:47:54,643 INFO L226 Difference]: Without dead ends: 94 [2021-02-19 19:47:54,643 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:47:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-02-19 19:47:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2021-02-19 19:47:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8363636363636364) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 101 transitions. [2021-02-19 19:47:54,648 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 101 transitions. Word has length 19 [2021-02-19 19:47:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:54,648 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 101 transitions. [2021-02-19 19:47:54,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:54,649 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 101 transitions. [2021-02-19 19:47:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:47:54,649 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:54,649 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:54,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:54,854 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:54,855 INFO L82 PathProgramCache]: Analyzing trace with hash 969272568, now seen corresponding path program 3 times [2021-02-19 19:47:54,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:54,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277748070] [2021-02-19 19:47:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:54,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277748070] [2021-02-19 19:47:54,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634771552] [2021-02-19 19:47:54,999 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:47:55,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:47:55,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:55,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:47:55,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:55,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:55,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:47:55,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354000941] [2021-02-19 19:47:55,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:47:55,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:55,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:47:55,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:47:55,273 INFO L87 Difference]: Start difference. First operand 56 states and 101 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:55,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:55,722 INFO L93 Difference]: Finished difference Result 130 states and 216 transitions. [2021-02-19 19:47:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:47:55,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-02-19 19:47:55,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:55,724 INFO L225 Difference]: With dead ends: 130 [2021-02-19 19:47:55,724 INFO L226 Difference]: Without dead ends: 110 [2021-02-19 19:47:55,725 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:47:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-02-19 19:47:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 65. [2021-02-19 19:47:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.875) internal successors, (120), 64 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 120 transitions. [2021-02-19 19:47:55,730 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 120 transitions. Word has length 19 [2021-02-19 19:47:55,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:55,730 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 120 transitions. [2021-02-19 19:47:55,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:55,730 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 120 transitions. [2021-02-19 19:47:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:47:55,731 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:55,731 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:55,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:55,942 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:55,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1619341538, now seen corresponding path program 4 times [2021-02-19 19:47:55,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:55,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104185951] [2021-02-19 19:47:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:56,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104185951] [2021-02-19 19:47:56,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428581844] [2021-02-19 19:47:56,063 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:56,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:47:56,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:56,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:47:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:56,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:56,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:47:56,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239711710] [2021-02-19 19:47:56,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:47:56,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:56,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:47:56,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:47:56,322 INFO L87 Difference]: Start difference. First operand 65 states and 120 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:56,712 INFO L93 Difference]: Finished difference Result 106 states and 184 transitions. [2021-02-19 19:47:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:47:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-02-19 19:47:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:56,713 INFO L225 Difference]: With dead ends: 106 [2021-02-19 19:47:56,713 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 19:47:56,714 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:47:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 19:47:56,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-02-19 19:47:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 66 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 123 transitions. [2021-02-19 19:47:56,719 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 123 transitions. Word has length 19 [2021-02-19 19:47:56,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:56,719 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 123 transitions. [2021-02-19 19:47:56,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 123 transitions. [2021-02-19 19:47:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:47:56,720 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:56,720 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:56,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 19:47:56,930 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:56,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:56,931 INFO L82 PathProgramCache]: Analyzing trace with hash 41380604, now seen corresponding path program 5 times [2021-02-19 19:47:56,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:56,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048495632] [2021-02-19 19:47:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:57,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048495632] [2021-02-19 19:47:57,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437878829] [2021-02-19 19:47:57,075 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:57,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:47:57,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:47:57,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:57,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:57,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:47:57,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12455960] [2021-02-19 19:47:57,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:47:57,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:57,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:47:57,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:47:57,319 INFO L87 Difference]: Start difference. First operand 67 states and 123 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:57,512 INFO L93 Difference]: Finished difference Result 95 states and 164 transitions. [2021-02-19 19:47:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:47:57,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-02-19 19:47:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:57,514 INFO L225 Difference]: With dead ends: 95 [2021-02-19 19:47:57,514 INFO L226 Difference]: Without dead ends: 82 [2021-02-19 19:47:57,514 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:47:57,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-02-19 19:47:57,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-02-19 19:47:57,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 63 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 117 transitions. [2021-02-19 19:47:57,518 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 117 transitions. Word has length 19 [2021-02-19 19:47:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:57,519 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 117 transitions. [2021-02-19 19:47:57,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 117 transitions. [2021-02-19 19:47:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:47:57,519 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:57,520 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:57,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:57,734 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:57,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1177565876, now seen corresponding path program 6 times [2021-02-19 19:47:57,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:57,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544935479] [2021-02-19 19:47:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:57,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544935479] [2021-02-19 19:47:57,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650227819] [2021-02-19 19:47:57,872 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:57,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:47:57,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:57,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 19:47:57,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:58,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:58,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:47:58,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768782405] [2021-02-19 19:47:58,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:47:58,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:58,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:47:58,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:47:58,146 INFO L87 Difference]: Start difference. First operand 64 states and 117 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:58,278 INFO L93 Difference]: Finished difference Result 86 states and 145 transitions. [2021-02-19 19:47:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:47:58,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-02-19 19:47:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:58,284 INFO L225 Difference]: With dead ends: 86 [2021-02-19 19:47:58,284 INFO L226 Difference]: Without dead ends: 76 [2021-02-19 19:47:58,284 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:47:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-19 19:47:58,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-02-19 19:47:58,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 58 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2021-02-19 19:47:58,288 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 19 [2021-02-19 19:47:58,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:58,288 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2021-02-19 19:47:58,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2021-02-19 19:47:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:47:58,289 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:58,289 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:58,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:58,502 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1827634846, now seen corresponding path program 7 times [2021-02-19 19:47:58,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:58,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342265411] [2021-02-19 19:47:58,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:58,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342265411] [2021-02-19 19:47:58,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357392492] [2021-02-19 19:47:58,624 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:58,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:47:58,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:58,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:58,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 19:47:58,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748998425] [2021-02-19 19:47:58,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:47:58,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:58,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:47:58,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:47:58,839 INFO L87 Difference]: Start difference. First operand 59 states and 106 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:58,960 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2021-02-19 19:47:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:47:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-02-19 19:47:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:58,962 INFO L225 Difference]: With dead ends: 74 [2021-02-19 19:47:58,962 INFO L226 Difference]: Without dead ends: 67 [2021-02-19 19:47:58,962 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:47:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-19 19:47:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2021-02-19 19:47:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 100 transitions. [2021-02-19 19:47:58,966 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 100 transitions. Word has length 19 [2021-02-19 19:47:58,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:58,966 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 100 transitions. [2021-02-19 19:47:58,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:58,966 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 100 transitions. [2021-02-19 19:47:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:47:58,966 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:58,967 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:59,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 19:47:59,182 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:59,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:59,182 INFO L82 PathProgramCache]: Analyzing trace with hash 916856118, now seen corresponding path program 8 times [2021-02-19 19:47:59,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:59,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298973926] [2021-02-19 19:47:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:47:59,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298973926] [2021-02-19 19:47:59,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211174687] [2021-02-19 19:47:59,323 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:59,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:47:59,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:59,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:47:59,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:59,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:59,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 19:47:59,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177522783] [2021-02-19 19:47:59,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:47:59,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:59,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:47:59,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:47:59,559 INFO L87 Difference]: Start difference. First operand 56 states and 100 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:00,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:00,115 INFO L93 Difference]: Finished difference Result 107 states and 190 transitions. [2021-02-19 19:48:00,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:48:00,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-02-19 19:48:00,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:00,116 INFO L225 Difference]: With dead ends: 107 [2021-02-19 19:48:00,116 INFO L226 Difference]: Without dead ends: 65 [2021-02-19 19:48:00,117 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:48:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-19 19:48:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-02-19 19:48:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 87 transitions. [2021-02-19 19:48:00,123 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 87 transitions. Word has length 21 [2021-02-19 19:48:00,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:00,123 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 87 transitions. [2021-02-19 19:48:00,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:00,123 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 87 transitions. [2021-02-19 19:48:00,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:48:00,126 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:00,126 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:00,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 19:48:00,334 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:00,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:00,335 INFO L82 PathProgramCache]: Analyzing trace with hash -348071742, now seen corresponding path program 9 times [2021-02-19 19:48:00,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:00,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281038129] [2021-02-19 19:48:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:48:00,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281038129] [2021-02-19 19:48:00,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526137954] [2021-02-19 19:48:00,455 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:00,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:48:00,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:00,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:48:00,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:00,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:00,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:00,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 19:48:00,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293522533] [2021-02-19 19:48:00,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:48:00,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:00,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:48:00,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:48:00,758 INFO L87 Difference]: Start difference. First operand 51 states and 87 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:01,490 INFO L93 Difference]: Finished difference Result 85 states and 141 transitions. [2021-02-19 19:48:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:48:01,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-02-19 19:48:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:01,491 INFO L225 Difference]: With dead ends: 85 [2021-02-19 19:48:01,491 INFO L226 Difference]: Without dead ends: 56 [2021-02-19 19:48:01,492 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:48:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-02-19 19:48:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-02-19 19:48:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 81 transitions. [2021-02-19 19:48:01,495 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 81 transitions. Word has length 21 [2021-02-19 19:48:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:01,495 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 81 transitions. [2021-02-19 19:48:01,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 81 transitions. [2021-02-19 19:48:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:48:01,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:01,497 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:01,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 19:48:01,706 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash 788113530, now seen corresponding path program 10 times [2021-02-19 19:48:01,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:01,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446961984] [2021-02-19 19:48:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:48:01,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446961984] [2021-02-19 19:48:01,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040132452] [2021-02-19 19:48:01,818 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:01,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:48:01,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:01,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:48:01,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:02,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:02,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 19:48:02,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127013549] [2021-02-19 19:48:02,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:48:02,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:02,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:48:02,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:48:02,099 INFO L87 Difference]: Start difference. First operand 48 states and 81 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:03,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:03,022 INFO L93 Difference]: Finished difference Result 90 states and 147 transitions. [2021-02-19 19:48:03,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:48:03,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-02-19 19:48:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:03,023 INFO L225 Difference]: With dead ends: 90 [2021-02-19 19:48:03,023 INFO L226 Difference]: Without dead ends: 70 [2021-02-19 19:48:03,024 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:48:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-19 19:48:03,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2021-02-19 19:48:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-02-19 19:48:03,027 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-02-19 19:48:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:03,027 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-02-19 19:48:03,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-02-19 19:48:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:48:03,028 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:03,028 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:03,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:03,229 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:03,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1438182500, now seen corresponding path program 11 times [2021-02-19 19:48:03,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:03,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394670548] [2021-02-19 19:48:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:48:03,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394670548] [2021-02-19 19:48:03,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501210763] [2021-02-19 19:48:03,334 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:03,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:48:03,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:03,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:48:03,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:03,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:03,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 19:48:03,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757601508] [2021-02-19 19:48:03,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:48:03,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:48:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:48:03,561 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:04,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:04,524 INFO L93 Difference]: Finished difference Result 79 states and 133 transitions. [2021-02-19 19:48:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:48:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-02-19 19:48:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:04,525 INFO L225 Difference]: With dead ends: 79 [2021-02-19 19:48:04,525 INFO L226 Difference]: Without dead ends: 65 [2021-02-19 19:48:04,526 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:48:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-19 19:48:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-02-19 19:48:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:04,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-02-19 19:48:04,529 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-02-19 19:48:04,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:04,529 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-02-19 19:48:04,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-02-19 19:48:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:48:04,530 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:04,530 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:04,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 19:48:04,738 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:04,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1674756474, now seen corresponding path program 12 times [2021-02-19 19:48:04,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:04,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945382394] [2021-02-19 19:48:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:04,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945382394] [2021-02-19 19:48:04,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141566307] [2021-02-19 19:48:04,871 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:48:04,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:48:04,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:04,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:04,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:05,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:05,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:48:05,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368420664] [2021-02-19 19:48:05,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:48:05,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:05,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:48:05,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:48:05,204 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:05,660 INFO L93 Difference]: Finished difference Result 107 states and 173 transitions. [2021-02-19 19:48:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:48:05,660 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-02-19 19:48:05,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:05,661 INFO L225 Difference]: With dead ends: 107 [2021-02-19 19:48:05,661 INFO L226 Difference]: Without dead ends: 93 [2021-02-19 19:48:05,661 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:48:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-02-19 19:48:05,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 49. [2021-02-19 19:48:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:05,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 87 transitions. [2021-02-19 19:48:05,664 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 87 transitions. Word has length 21 [2021-02-19 19:48:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:05,664 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 87 transitions. [2021-02-19 19:48:05,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 87 transitions. [2021-02-19 19:48:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:48:05,664 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:05,665 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:05,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 19:48:05,866 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:05,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:05,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1734412542, now seen corresponding path program 13 times [2021-02-19 19:48:05,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:05,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061623012] [2021-02-19 19:48:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:05,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061623012] [2021-02-19 19:48:05,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378460807] [2021-02-19 19:48:05,974 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:05,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:48:05,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:06,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:06,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:48:06,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296130864] [2021-02-19 19:48:06,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:48:06,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:06,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:48:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:48:06,202 INFO L87 Difference]: Start difference. First operand 49 states and 87 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:06,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:06,705 INFO L93 Difference]: Finished difference Result 114 states and 189 transitions. [2021-02-19 19:48:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:48:06,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-02-19 19:48:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:06,706 INFO L225 Difference]: With dead ends: 114 [2021-02-19 19:48:06,706 INFO L226 Difference]: Without dead ends: 100 [2021-02-19 19:48:06,707 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:48:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-02-19 19:48:06,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 50. [2021-02-19 19:48:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.816326530612245) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2021-02-19 19:48:06,710 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 21 [2021-02-19 19:48:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:06,710 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2021-02-19 19:48:06,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2021-02-19 19:48:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:48:06,710 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:06,710 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:06,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:06,911 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash 721720010, now seen corresponding path program 14 times [2021-02-19 19:48:06,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:06,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659319534] [2021-02-19 19:48:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:07,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659319534] [2021-02-19 19:48:07,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606570461] [2021-02-19 19:48:07,047 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:07,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:48:07,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:07,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:48:07,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:07,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:07,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:48:07,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244020992] [2021-02-19 19:48:07,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:48:07,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:07,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:48:07,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:48:07,295 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:07,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:07,998 INFO L93 Difference]: Finished difference Result 182 states and 297 transitions. [2021-02-19 19:48:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 19:48:07,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-02-19 19:48:07,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:07,999 INFO L225 Difference]: With dead ends: 182 [2021-02-19 19:48:07,999 INFO L226 Difference]: Without dead ends: 161 [2021-02-19 19:48:08,000 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=338, Invalid=1732, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:48:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-19 19:48:08,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 55. [2021-02-19 19:48:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 104 transitions. [2021-02-19 19:48:08,004 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 104 transitions. Word has length 21 [2021-02-19 19:48:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:08,004 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 104 transitions. [2021-02-19 19:48:08,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 104 transitions. [2021-02-19 19:48:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:48:08,004 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:08,004 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:08,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:08,210 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:08,210 INFO L82 PathProgramCache]: Analyzing trace with hash 186490208, now seen corresponding path program 15 times [2021-02-19 19:48:08,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:08,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531595727] [2021-02-19 19:48:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:08,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531595727] [2021-02-19 19:48:08,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345326096] [2021-02-19 19:48:08,339 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:08,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:48:08,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:08,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:48:08,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:08,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:08,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:48:08,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183370382] [2021-02-19 19:48:08,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:48:08,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:08,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:48:08,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:48:08,618 INFO L87 Difference]: Start difference. First operand 55 states and 104 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:09,238 INFO L93 Difference]: Finished difference Result 143 states and 238 transitions. [2021-02-19 19:48:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:48:09,239 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-02-19 19:48:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:09,240 INFO L225 Difference]: With dead ends: 143 [2021-02-19 19:48:09,240 INFO L226 Difference]: Without dead ends: 90 [2021-02-19 19:48:09,240 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:48:09,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-19 19:48:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 47. [2021-02-19 19:48:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 83 transitions. [2021-02-19 19:48:09,243 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 83 transitions. Word has length 21 [2021-02-19 19:48:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:09,243 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 83 transitions. [2021-02-19 19:48:09,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 83 transitions. [2021-02-19 19:48:09,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:48:09,244 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:09,244 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:09,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:09,458 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:09,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:09,458 INFO L82 PathProgramCache]: Analyzing trace with hash 889441090, now seen corresponding path program 16 times [2021-02-19 19:48:09,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:09,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450739079] [2021-02-19 19:48:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:09,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450739079] [2021-02-19 19:48:09,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156409742] [2021-02-19 19:48:09,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:48:09,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:48:09,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:09,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:48:09,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:09,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:09,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:48:09,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909430565] [2021-02-19 19:48:09,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:48:09,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:09,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:48:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:48:09,877 INFO L87 Difference]: Start difference. First operand 47 states and 83 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:10,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:10,301 INFO L93 Difference]: Finished difference Result 97 states and 165 transitions. [2021-02-19 19:48:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:48:10,301 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-02-19 19:48:10,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:10,302 INFO L225 Difference]: With dead ends: 97 [2021-02-19 19:48:10,302 INFO L226 Difference]: Without dead ends: 83 [2021-02-19 19:48:10,302 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:48:10,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-19 19:48:10,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-02-19 19:48:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.8387096774193548) internal successors, (114), 62 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2021-02-19 19:48:10,307 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 21 [2021-02-19 19:48:10,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:10,307 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2021-02-19 19:48:10,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2021-02-19 19:48:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:48:10,308 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:10,308 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:10,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 19:48:10,518 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:10,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:10,518 INFO L82 PathProgramCache]: Analyzing trace with hash -123251442, now seen corresponding path program 17 times [2021-02-19 19:48:10,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:10,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840881270] [2021-02-19 19:48:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:10,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840881270] [2021-02-19 19:48:10,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260866172] [2021-02-19 19:48:10,665 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:48:10,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:48:10,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:48:10,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:10,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:10,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:48:10,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894503686] [2021-02-19 19:48:10,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:48:10,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:48:10,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:48:10,940 INFO L87 Difference]: Start difference. First operand 63 states and 114 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:11,495 INFO L93 Difference]: Finished difference Result 133 states and 227 transitions. [2021-02-19 19:48:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:48:11,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-02-19 19:48:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:11,497 INFO L225 Difference]: With dead ends: 133 [2021-02-19 19:48:11,497 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 19:48:11,497 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:48:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 19:48:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2021-02-19 19:48:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 66 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) [2021-02-19 19:48:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 126 transitions. [2021-02-19 19:48:11,501 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 126 transitions. Word has length 21 [2021-02-19 19:48:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:11,501 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 126 transitions. [2021-02-19 19:48:11,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 126 transitions. [2021-02-19 19:48:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:48:11,501 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:11,501 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:11,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 19:48:11,714 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:11,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:11,714 INFO L82 PathProgramCache]: Analyzing trace with hash -658481244, now seen corresponding path program 18 times [2021-02-19 19:48:11,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:11,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733086990] [2021-02-19 19:48:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:11,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733086990] [2021-02-19 19:48:11,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137029186] [2021-02-19 19:48:11,819 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 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 [2021-02-19 19:48:11,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:48:11,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:11,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:48:11,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:12,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:12,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:48:12,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839364838] [2021-02-19 19:48:12,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:48:12,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:12,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:48:12,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:48:12,106 INFO L87 Difference]: Start difference. First operand 67 states and 126 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:12,714 INFO L93 Difference]: Finished difference Result 111 states and 193 transitions. [2021-02-19 19:48:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:48:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-02-19 19:48:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:12,715 INFO L225 Difference]: With dead ends: 111 [2021-02-19 19:48:12,715 INFO L226 Difference]: Without dead ends: 73 [2021-02-19 19:48:12,715 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:48:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-19 19:48:12,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2021-02-19 19:48:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 99 transitions. [2021-02-19 19:48:12,718 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 99 transitions. Word has length 21 [2021-02-19 19:48:12,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:12,718 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 99 transitions. [2021-02-19 19:48:12,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:12,718 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 99 transitions. [2021-02-19 19:48:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:48:12,718 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:12,719 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:12,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:12,919 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:12,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash 325067144, now seen corresponding path program 19 times [2021-02-19 19:48:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:12,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040593525] [2021-02-19 19:48:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 19:48:13,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040593525] [2021-02-19 19:48:13,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696497936] [2021-02-19 19:48:13,022 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 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 [2021-02-19 19:48:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:13,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:48:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:13,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:13,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:13,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 19:48:13,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527819777] [2021-02-19 19:48:13,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:48:13,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:13,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:48:13,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:48:13,272 INFO L87 Difference]: Start difference. First operand 57 states and 99 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:13,839 INFO L93 Difference]: Finished difference Result 109 states and 188 transitions. [2021-02-19 19:48:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:48:13,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:48:13,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:13,840 INFO L225 Difference]: With dead ends: 109 [2021-02-19 19:48:13,841 INFO L226 Difference]: Without dead ends: 95 [2021-02-19 19:48:13,841 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:48:13,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-19 19:48:13,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 61. [2021-02-19 19:48:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.7833333333333334) internal successors, (107), 60 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2021-02-19 19:48:13,844 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 23 [2021-02-19 19:48:13,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:13,844 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2021-02-19 19:48:13,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2021-02-19 19:48:13,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:48:13,845 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:13,845 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:14,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 19:48:14,054 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:14,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:14,054 INFO L82 PathProgramCache]: Analyzing trace with hash -560731136, now seen corresponding path program 20 times [2021-02-19 19:48:14,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:14,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041393700] [2021-02-19 19:48:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:48:14,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041393700] [2021-02-19 19:48:14,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676176448] [2021-02-19 19:48:14,202 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:48:14,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:48:14,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:14,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:48:14,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:14,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:14,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 19:48:14,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289951951] [2021-02-19 19:48:14,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:48:14,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:14,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:48:14,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:48:14,530 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:15,122 INFO L93 Difference]: Finished difference Result 120 states and 210 transitions. [2021-02-19 19:48:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:48:15,123 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:48:15,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:15,124 INFO L225 Difference]: With dead ends: 120 [2021-02-19 19:48:15,124 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 19:48:15,124 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:48:15,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 19:48:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 61. [2021-02-19 19:48:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 108 transitions. [2021-02-19 19:48:15,127 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 108 transitions. Word has length 23 [2021-02-19 19:48:15,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:15,128 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 108 transitions. [2021-02-19 19:48:15,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 108 transitions. [2021-02-19 19:48:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:48:15,128 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:15,128 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:15,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:15,338 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1573423668, now seen corresponding path program 21 times [2021-02-19 19:48:15,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:15,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532626112] [2021-02-19 19:48:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:48:15,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532626112] [2021-02-19 19:48:15,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651807536] [2021-02-19 19:48:15,429 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:15,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:48:15,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:15,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:48:15,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:15,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:15,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 19:48:15,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684227731] [2021-02-19 19:48:15,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:48:15,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:15,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:48:15,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:48:15,704 INFO L87 Difference]: Start difference. First operand 61 states and 108 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:16,635 INFO L93 Difference]: Finished difference Result 116 states and 202 transitions. [2021-02-19 19:48:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:48:16,636 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:48:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:16,637 INFO L225 Difference]: With dead ends: 116 [2021-02-19 19:48:16,637 INFO L226 Difference]: Without dead ends: 102 [2021-02-19 19:48:16,637 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 19:48:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-02-19 19:48:16,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2021-02-19 19:48:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 58 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2021-02-19 19:48:16,640 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 23 [2021-02-19 19:48:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:16,640 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2021-02-19 19:48:16,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2021-02-19 19:48:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:48:16,641 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:16,641 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:16,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 19:48:16,854 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:16,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2108653470, now seen corresponding path program 22 times [2021-02-19 19:48:16,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:16,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282927758] [2021-02-19 19:48:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 19:48:16,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282927758] [2021-02-19 19:48:16,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741373504] [2021-02-19 19:48:16,958 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:16,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:48:16,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:16,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:48:16,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:17,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:17,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 19:48:17,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271306201] [2021-02-19 19:48:17,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:48:17,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:17,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:48:17,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:48:17,202 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:17,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:17,829 INFO L93 Difference]: Finished difference Result 92 states and 163 transitions. [2021-02-19 19:48:17,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:48:17,830 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:48:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:17,830 INFO L225 Difference]: With dead ends: 92 [2021-02-19 19:48:17,830 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 19:48:17,831 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=1380, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:48:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 19:48:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 19:48:17,831 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) [2021-02-19 19:48:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 19:48:17,831 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-02-19 19:48:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:17,831 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 19:48:17,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 19:48:17,832 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 19:48:18,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 19:48:18,043 INFO L202 PluginConnector]: Adding new model counter-add-2-semi-alt-OJ4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:48:18 BasicIcfg [2021-02-19 19:48:18,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:48:18,044 INFO L168 Benchmark]: Toolchain (without parser) took 31277.53 ms. Allocated memory was 255.9 MB in the beginning and 494.9 MB in the end (delta: 239.1 MB). Free memory was 236.6 MB in the beginning and 396.4 MB in the end (delta: -159.8 MB). Peak memory consumption was 79.9 MB. Max. memory is 16.0 GB. [2021-02-19 19:48:18,045 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 255.9 MB. Free memory was 237.7 MB in the beginning and 237.6 MB in the end (delta: 82.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:48:18,045 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.62 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:48:18,046 INFO L168 Benchmark]: Boogie Preprocessor took 17.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 940.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:48:18,046 INFO L168 Benchmark]: RCFGBuilder took 358.87 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 236.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.0 GB. [2021-02-19 19:48:18,046 INFO L168 Benchmark]: TraceAbstraction took 30860.94 ms. Allocated memory was 255.9 MB in the beginning and 494.9 MB in the end (delta: 239.1 MB). Free memory was 236.2 MB in the beginning and 396.4 MB in the end (delta: -160.3 MB). Peak memory consumption was 78.4 MB. Max. memory is 16.0 GB. [2021-02-19 19:48:18,046 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 0.26 ms. Allocated memory is still 255.9 MB. Free memory was 237.7 MB in the beginning and 237.6 MB in the end (delta: 82.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.62 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 940.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 358.87 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 236.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 30860.94 ms. Allocated memory was 255.9 MB in the beginning and 494.9 MB in the end (delta: 239.1 MB). Free memory was 236.2 MB in the beginning and 396.4 MB in the end (delta: -160.3 MB). Peak memory consumption was 78.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.7s, OverallIterations: 28, TraceHistogramMax: 3, AutomataDifference: 13.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 546 SDtfs, 3102 SDslu, 3645 SDs, 0 SdLazy, 6940 SolverSat, 414 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1218 GetRequests, 289 SyntacticMatches, 26 SemanticMatches, 903 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8019 ImplicationChecksByTransitivity, 15.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 28 MinimizatonAttempts, 848 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 9.9s InterpolantComputationTime, 1078 NumberOfCodeBlocks, 1078 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1024 ConstructedInterpolants, 0 QuantifiedInterpolants, 245396 SizeOfPredicates, 130 NumberOfNonLiveVariables, 1085 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 54 InterpolantComputations, 2 PerfectInterpolantSequences, 14/226 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...