/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:59:16,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:59:16,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:59:16,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:59:16,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:59:16,387 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:59:16,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:59:16,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:59:16,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:59:16,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:59:16,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:59:16,398 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:59:16,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:59:16,399 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:59:16,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:59:16,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:59:16,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:59:16,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:59:16,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:59:16,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:59:16,399 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:59:16,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:59:16,399 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:59:16,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:59:16,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:59:16,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:59:16,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:59:16,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:59:16,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:59:16,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:59:16,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:59:16,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:59:16,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:59:16,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:59:16,401 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:59:16,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:59:16,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:59:16,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:59:16,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:59:16,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:59:16,669 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:59:16,670 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:59:16,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl [2021-07-13 19:59:16,671 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl' [2021-07-13 19:59:16,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:59:16,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:59:16,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:59:16,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:59:16,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:59:16,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:59:16" (1/1) ... [2021-07-13 19:59:16,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:59:16" (1/1) ... [2021-07-13 19:59:16,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:59:16,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:59:16,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:59:16,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:59:16,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:59:16" (1/1) ... [2021-07-13 19:59:16,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:59:16" (1/1) ... [2021-07-13 19:59:16,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:59:16" (1/1) ... [2021-07-13 19:59:16,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:59:16" (1/1) ... [2021-07-13 19:59:16,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:59:16" (1/1) ... [2021-07-13 19:59:16,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:59:16" (1/1) ... [2021-07-13 19:59:16,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:59:16" (1/1) ... [2021-07-13 19:59:16,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:59:16,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:59:16,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:59:16,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:59:16,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:59:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:59:16,787 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:59:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:59:16,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:59:16,788 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:59:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:59:16,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:59:16,788 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:59:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:59:16,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:59:16,789 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:59:16,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:59:16,940 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:59:16,942 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:59:16 BoogieIcfgContainer [2021-07-13 19:59:16,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:59:16,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:59:16,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:59:16,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:59:16,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:59:16" (1/2) ... [2021-07-13 19:59:16,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d740f2 and model type figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:59:16, skipping insertion in model container [2021-07-13 19:59:16,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:59:16" (2/2) ... [2021-07-13 19:59:16,947 INFO L111 eAbstractionObserver]: Analyzing ICFG figure3.wvr.bpl [2021-07-13 19:59:16,951 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:59:16,951 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:59:16,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:59:16,951 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:59:17,014 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:59:17,038 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:59:17,061 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:59:17,061 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:59:17,061 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:59:17,061 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:59:17,061 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:59:17,061 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:59:17,061 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:59:17,061 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:59:17,070 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-07-13 19:59:17,081 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:59:17,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:17,088 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:17,088 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:17,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1891492345, now seen corresponding path program 1 times [2021-07-13 19:59:17,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:17,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601647200] [2021-07-13 19:59:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:17,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:17,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601647200] [2021-07-13 19:59:17,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601647200] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:59:17,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:59:17,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:59:17,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702125218] [2021-07-13 19:59:17,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:59:17,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:17,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:59:17,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:59:17,245 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:17,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:17,279 INFO L93 Difference]: Finished difference Result 58 states and 101 transitions. [2021-07-13 19:59:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:59:17,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:59:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:17,300 INFO L225 Difference]: With dead ends: 58 [2021-07-13 19:59:17,300 INFO L226 Difference]: Without dead ends: 43 [2021-07-13 19:59:17,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:59:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-13 19:59:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-07-13 19:59:17,322 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) [2021-07-13 19:59:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-07-13 19:59:17,324 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-07-13 19:59:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:17,325 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-07-13 19:59:17,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-07-13 19:59:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:59:17,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:17,327 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:17,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:59:17,327 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:17,331 INFO L82 PathProgramCache]: Analyzing trace with hash -672639493, now seen corresponding path program 1 times [2021-07-13 19:59:17,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:17,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675436711] [2021-07-13 19:59:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:17,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:17,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675436711] [2021-07-13 19:59:17,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675436711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:17,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798127939] [2021-07-13 19:59:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:59:17,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:17,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798127939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:17,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:17,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-07-13 19:59:17,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342997304] [2021-07-13 19:59:17,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:59:17,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:17,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:59:17,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:59:17,625 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:17,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:17,765 INFO L93 Difference]: Finished difference Result 64 states and 109 transitions. [2021-07-13 19:59:17,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:59:17,766 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:59:17,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:17,766 INFO L225 Difference]: With dead ends: 64 [2021-07-13 19:59:17,767 INFO L226 Difference]: Without dead ends: 64 [2021-07-13 19:59:17,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:59:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-07-13 19:59:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2021-07-13 19:59:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2021-07-13 19:59:17,776 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 17 [2021-07-13 19:59:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:17,776 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2021-07-13 19:59:17,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2021-07-13 19:59:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:59:17,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:17,777 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:17,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:59:17,978 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:17,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:17,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1676307169, now seen corresponding path program 2 times [2021-07-13 19:59:17,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:17,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919480252] [2021-07-13 19:59:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:18,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:18,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919480252] [2021-07-13 19:59:18,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919480252] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:59:18,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:59:18,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:59:18,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405962176] [2021-07-13 19:59:18,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:59:18,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:18,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:59:18,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:59:18,036 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:18,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:18,122 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-07-13 19:59:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:59:18,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:59:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:18,123 INFO L225 Difference]: With dead ends: 51 [2021-07-13 19:59:18,123 INFO L226 Difference]: Without dead ends: 49 [2021-07-13 19:59:18,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:59:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-13 19:59:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-07-13 19:59:18,138 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) [2021-07-13 19:59:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-07-13 19:59:18,139 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-07-13 19:59:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:18,139 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-07-13 19:59:18,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-07-13 19:59:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:59:18,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:18,141 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:18,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:59:18,142 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:18,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:18,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1210697401, now seen corresponding path program 1 times [2021-07-13 19:59:18,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:18,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892548348] [2021-07-13 19:59:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:18,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:18,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892548348] [2021-07-13 19:59:18,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892548348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:18,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509534821] [2021-07-13 19:59:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:18,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:18,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:59:18,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:18,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509534821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:18,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:18,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:59:18,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535142947] [2021-07-13 19:59:18,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:59:18,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:18,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:59:18,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:59:18,270 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:18,288 INFO L93 Difference]: Finished difference Result 97 states and 174 transitions. [2021-07-13 19:59:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:59:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:59:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:18,289 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:59:18,289 INFO L226 Difference]: Without dead ends: 76 [2021-07-13 19:59:18,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:59:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-13 19:59:18,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-07-13 19:59:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.896551724137931) internal successors, (110), 58 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 110 transitions. [2021-07-13 19:59:18,293 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 110 transitions. Word has length 19 [2021-07-13 19:59:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:18,293 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 110 transitions. [2021-07-13 19:59:18,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:18,293 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 110 transitions. [2021-07-13 19:59:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:59:18,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:18,294 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:18,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:18,504 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1830185403, now seen corresponding path program 2 times [2021-07-13 19:59:18,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:18,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416235411] [2021-07-13 19:59:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:18,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:18,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:18,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416235411] [2021-07-13 19:59:18,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416235411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:18,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465630122] [2021-07-13 19:59:18,568 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:18,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:18,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:18,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:59:18,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:18,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465630122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:18,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:18,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-13 19:59:18,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097639151] [2021-07-13 19:59:18,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:59:18,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:18,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:59:18,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:59:18,781 INFO L87 Difference]: Start difference. First operand 59 states and 110 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-07-13 19:59:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:19,047 INFO L93 Difference]: Finished difference Result 174 states and 309 transitions. [2021-07-13 19:59:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:59:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 21 [2021-07-13 19:59:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:19,051 INFO L225 Difference]: With dead ends: 174 [2021-07-13 19:59:19,051 INFO L226 Difference]: Without dead ends: 168 [2021-07-13 19:59:19,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:59:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-13 19:59:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 68. [2021-07-13 19:59:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 67 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2021-07-13 19:59:19,068 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 21 [2021-07-13 19:59:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:19,069 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2021-07-13 19:59:19,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-07-13 19:59:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2021-07-13 19:59:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:59:19,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:19,069 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:19,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:19,270 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:19,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:19,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1099819493, now seen corresponding path program 3 times [2021-07-13 19:59:19,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:19,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674796252] [2021-07-13 19:59:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:19,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:19,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674796252] [2021-07-13 19:59:19,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674796252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:19,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772058643] [2021-07-13 19:59:19,312 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:19,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:59:19,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:19,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:59:19,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:19,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772058643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:19,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:19,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-13 19:59:19,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876750195] [2021-07-13 19:59:19,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:59:19,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:19,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:59:19,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:59:19,446 INFO L87 Difference]: Start difference. First operand 68 states and 130 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:19,699 INFO L93 Difference]: Finished difference Result 146 states and 268 transitions. [2021-07-13 19:59:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:59:19,699 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 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 21 [2021-07-13 19:59:19,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:19,700 INFO L225 Difference]: With dead ends: 146 [2021-07-13 19:59:19,700 INFO L226 Difference]: Without dead ends: 142 [2021-07-13 19:59:19,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:59:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-13 19:59:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 67. [2021-07-13 19:59:19,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 66 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 127 transitions. [2021-07-13 19:59:19,703 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 127 transitions. Word has length 21 [2021-07-13 19:59:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:19,703 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 127 transitions. [2021-07-13 19:59:19,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,704 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 127 transitions. [2021-07-13 19:59:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:59:19,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:19,704 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:19,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:19,917 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:19,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:19,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1243736697, now seen corresponding path program 4 times [2021-07-13 19:59:19,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:19,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921928691] [2021-07-13 19:59:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:19,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:19,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921928691] [2021-07-13 19:59:19,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921928691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:19,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376528270] [2021-07-13 19:59:19,974 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:20,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:20,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:59:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:20,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376528270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:20,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:20,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:59:20,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795737062] [2021-07-13 19:59:20,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:59:20,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:20,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:59:20,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:59:20,059 INFO L87 Difference]: Start difference. First operand 67 states and 127 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:20,076 INFO L93 Difference]: Finished difference Result 163 states and 310 transitions. [2021-07-13 19:59:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:59:20,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:59:20,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:20,077 INFO L225 Difference]: With dead ends: 163 [2021-07-13 19:59:20,077 INFO L226 Difference]: Without dead ends: 136 [2021-07-13 19:59:20,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:59:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-13 19:59:20,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2021-07-13 19:59:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-07-13 19:59:20,081 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 23 [2021-07-13 19:59:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:20,081 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-07-13 19:59:20,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-07-13 19:59:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:59:20,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:20,082 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:20,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 19:59:20,297 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:20,298 INFO L82 PathProgramCache]: Analyzing trace with hash 304168059, now seen corresponding path program 5 times [2021-07-13 19:59:20,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:20,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813359934] [2021-07-13 19:59:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:20,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:20,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813359934] [2021-07-13 19:59:20,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813359934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:20,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728002477] [2021-07-13 19:59:20,362 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:20,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:59:20,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:20,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:59:20,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:20,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728002477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:20,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:20,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-13 19:59:20,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954901427] [2021-07-13 19:59:20,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:59:20,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:20,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:59:20,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:59:20,541 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:21,008 INFO L93 Difference]: Finished difference Result 365 states and 692 transitions. [2021-07-13 19:59:21,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:59:21,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:59:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:21,011 INFO L225 Difference]: With dead ends: 365 [2021-07-13 19:59:21,011 INFO L226 Difference]: Without dead ends: 335 [2021-07-13 19:59:21,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:59:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-13 19:59:21,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 93. [2021-07-13 19:59:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 92 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 180 transitions. [2021-07-13 19:59:21,023 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 180 transitions. Word has length 25 [2021-07-13 19:59:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:21,024 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 180 transitions. [2021-07-13 19:59:21,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 180 transitions. [2021-07-13 19:59:21,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:59:21,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:21,024 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:21,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:21,240 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:21,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:21,240 INFO L82 PathProgramCache]: Analyzing trace with hash -413112599, now seen corresponding path program 6 times [2021-07-13 19:59:21,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:21,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378195124] [2021-07-13 19:59:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:21,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:21,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378195124] [2021-07-13 19:59:21,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378195124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:21,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234394591] [2021-07-13 19:59:21,292 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:21,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:59:21,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:21,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:59:21,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:21,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234394591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:21,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:21,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-13 19:59:21,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657000286] [2021-07-13 19:59:21,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:59:21,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:21,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:59:21,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:59:21,433 INFO L87 Difference]: Start difference. First operand 93 states and 180 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-07-13 19:59:21,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:21,820 INFO L93 Difference]: Finished difference Result 240 states and 454 transitions. [2021-07-13 19:59:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:59:21,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 25 [2021-07-13 19:59:21,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:21,822 INFO L225 Difference]: With dead ends: 240 [2021-07-13 19:59:21,822 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:59:21,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:59:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 85. [2021-07-13 19:59:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:21,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 165 transitions. [2021-07-13 19:59:21,826 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 165 transitions. Word has length 25 [2021-07-13 19:59:21,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:21,826 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 165 transitions. [2021-07-13 19:59:21,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-07-13 19:59:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 165 transitions. [2021-07-13 19:59:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:59:21,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:21,827 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:22,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:22,041 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:22,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:22,041 INFO L82 PathProgramCache]: Analyzing trace with hash -675082951, now seen corresponding path program 7 times [2021-07-13 19:59:22,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:22,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752571322] [2021-07-13 19:59:22,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:22,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:22,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752571322] [2021-07-13 19:59:22,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752571322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:22,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79495826] [2021-07-13 19:59:22,084 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:22,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:59:22,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:22,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79495826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:22,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:22,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:59:22,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5584060] [2021-07-13 19:59:22,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:59:22,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:22,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:59:22,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:59:22,180 INFO L87 Difference]: Start difference. First operand 85 states and 165 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:22,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:22,204 INFO L93 Difference]: Finished difference Result 222 states and 427 transitions. [2021-07-13 19:59:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:59:22,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:59:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:22,206 INFO L225 Difference]: With dead ends: 222 [2021-07-13 19:59:22,206 INFO L226 Difference]: Without dead ends: 189 [2021-07-13 19:59:22,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:59:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-13 19:59:22,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2021-07-13 19:59:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.075862068965517) internal successors, (301), 145 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 301 transitions. [2021-07-13 19:59:22,209 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 301 transitions. Word has length 27 [2021-07-13 19:59:22,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:22,210 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 301 transitions. [2021-07-13 19:59:22,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 301 transitions. [2021-07-13 19:59:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:59:22,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:22,211 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:22,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:59:22,426 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:22,426 INFO L82 PathProgramCache]: Analyzing trace with hash 199593531, now seen corresponding path program 8 times [2021-07-13 19:59:22,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:22,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993448613] [2021-07-13 19:59:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:22,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:22,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993448613] [2021-07-13 19:59:22,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993448613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:22,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826293173] [2021-07-13 19:59:22,523 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:22,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:22,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:22,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:59:22,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:22,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826293173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:22,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:22,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 19:59:22,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336484200] [2021-07-13 19:59:22,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:59:22,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:22,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:59:22,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:59:22,727 INFO L87 Difference]: Start difference. First operand 146 states and 301 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:23,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:23,417 INFO L93 Difference]: Finished difference Result 562 states and 1078 transitions. [2021-07-13 19:59:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:59:23,421 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 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 29 [2021-07-13 19:59:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:23,423 INFO L225 Difference]: With dead ends: 562 [2021-07-13 19:59:23,423 INFO L226 Difference]: Without dead ends: 496 [2021-07-13 19:59:23,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 630.6ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:59:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-13 19:59:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 115. [2021-07-13 19:59:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.9824561403508771) internal successors, (226), 114 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:23,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 226 transitions. [2021-07-13 19:59:23,428 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 226 transitions. Word has length 29 [2021-07-13 19:59:23,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:23,428 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 226 transitions. [2021-07-13 19:59:23,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 226 transitions. [2021-07-13 19:59:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:59:23,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:23,429 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:23,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:23,645 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:23,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:23,645 INFO L82 PathProgramCache]: Analyzing trace with hash -827661843, now seen corresponding path program 9 times [2021-07-13 19:59:23,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:23,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851936212] [2021-07-13 19:59:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:23,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:23,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851936212] [2021-07-13 19:59:23,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851936212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:23,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120260554] [2021-07-13 19:59:23,717 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:59:23,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:59:23,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:59:23,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:23,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120260554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:23,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:23,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-13 19:59:23,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407663129] [2021-07-13 19:59:23,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:59:23,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:23,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:59:23,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:59:23,928 INFO L87 Difference]: Start difference. First operand 115 states and 226 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:24,606 INFO L93 Difference]: Finished difference Result 352 states and 678 transitions. [2021-07-13 19:59:24,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:59:24,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 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 29 [2021-07-13 19:59:24,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:24,608 INFO L225 Difference]: With dead ends: 352 [2021-07-13 19:59:24,608 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 19:59:24,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 583.9ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:59:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 19:59:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 103. [2021-07-13 19:59:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 203 transitions. [2021-07-13 19:59:24,612 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 203 transitions. Word has length 29 [2021-07-13 19:59:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:24,612 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 203 transitions. [2021-07-13 19:59:24,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 203 transitions. [2021-07-13 19:59:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:59:24,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:24,613 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:24,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:24,830 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:24,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:24,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1908010745, now seen corresponding path program 10 times [2021-07-13 19:59:24,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:24,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508666770] [2021-07-13 19:59:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:24,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:24,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508666770] [2021-07-13 19:59:24,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508666770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:24,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733893466] [2021-07-13 19:59:24,881 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:24,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:24,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:24,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:59:24,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:25,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733893466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:25,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:25,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:59:25,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236831133] [2021-07-13 19:59:25,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:59:25,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:25,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:59:25,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:59:25,019 INFO L87 Difference]: Start difference. First operand 103 states and 203 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:25,053 INFO L93 Difference]: Finished difference Result 281 states and 544 transitions. [2021-07-13 19:59:25,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:59:25,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:59:25,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:25,055 INFO L225 Difference]: With dead ends: 281 [2021-07-13 19:59:25,055 INFO L226 Difference]: Without dead ends: 242 [2021-07-13 19:59:25,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:59:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-13 19:59:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-07-13 19:59:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.097297297297297) internal successors, (388), 185 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 388 transitions. [2021-07-13 19:59:25,059 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 388 transitions. Word has length 31 [2021-07-13 19:59:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:25,059 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 388 transitions. [2021-07-13 19:59:25,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 388 transitions. [2021-07-13 19:59:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:25,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:25,060 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:25,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 19:59:25,269 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:25,269 INFO L82 PathProgramCache]: Analyzing trace with hash -556785925, now seen corresponding path program 11 times [2021-07-13 19:59:25,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:25,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303093507] [2021-07-13 19:59:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:25,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:25,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303093507] [2021-07-13 19:59:25,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303093507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:25,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333327763] [2021-07-13 19:59:25,364 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:25,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:59:25,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:25,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:59:25,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:25,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333327763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:25,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:25,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-13 19:59:25,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904345725] [2021-07-13 19:59:25,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:59:25,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:25,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:59:25,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:59:25,619 INFO L87 Difference]: Start difference. First operand 186 states and 388 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:26,687 INFO L93 Difference]: Finished difference Result 787 states and 1520 transitions. [2021-07-13 19:59:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:59:26,688 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 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 33 [2021-07-13 19:59:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:26,690 INFO L225 Difference]: With dead ends: 787 [2021-07-13 19:59:26,690 INFO L226 Difference]: Without dead ends: 679 [2021-07-13 19:59:26,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 917.0ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:59:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-07-13 19:59:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 137. [2021-07-13 19:59:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.0) internal successors, (272), 136 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 272 transitions. [2021-07-13 19:59:26,696 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 272 transitions. Word has length 33 [2021-07-13 19:59:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:26,696 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 272 transitions. [2021-07-13 19:59:26,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 272 transitions. [2021-07-13 19:59:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:59:26,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:26,697 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:26,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 19:59:26,913 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1177967345, now seen corresponding path program 12 times [2021-07-13 19:59:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:26,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867423679] [2021-07-13 19:59:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:26,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:26,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867423679] [2021-07-13 19:59:26,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867423679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:26,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772046375] [2021-07-13 19:59:26,970 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:26,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:59:26,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:26,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:59:26,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:27,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772046375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:27,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:27,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-13 19:59:27,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300329368] [2021-07-13 19:59:27,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:59:27,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:27,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:59:27,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:59:27,182 INFO L87 Difference]: Start difference. First operand 137 states and 272 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:28,152 INFO L93 Difference]: Finished difference Result 486 states and 946 transitions. [2021-07-13 19:59:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:59:28,152 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:59:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:28,153 INFO L225 Difference]: With dead ends: 486 [2021-07-13 19:59:28,154 INFO L226 Difference]: Without dead ends: 482 [2021-07-13 19:59:28,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 839.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 19:59:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-13 19:59:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 121. [2021-07-13 19:59:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 120 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 241 transitions. [2021-07-13 19:59:28,158 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 241 transitions. Word has length 33 [2021-07-13 19:59:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:28,158 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 241 transitions. [2021-07-13 19:59:28,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 241 transitions. [2021-07-13 19:59:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:59:28,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:28,160 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:28,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:59:28,365 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:28,365 INFO L82 PathProgramCache]: Analyzing trace with hash 876826553, now seen corresponding path program 13 times [2021-07-13 19:59:28,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:28,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005565064] [2021-07-13 19:59:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:28,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:28,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005565064] [2021-07-13 19:59:28,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005565064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:28,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901082272] [2021-07-13 19:59:28,429 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:59:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:28,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:59:28,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:28,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901082272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:28,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:28,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:59:28,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390329999] [2021-07-13 19:59:28,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:59:28,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:28,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:59:28,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:59:28,507 INFO L87 Difference]: Start difference. First operand 121 states and 241 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:28,555 INFO L93 Difference]: Finished difference Result 340 states and 661 transitions. [2021-07-13 19:59:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:59:28,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:59:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:28,558 INFO L225 Difference]: With dead ends: 340 [2021-07-13 19:59:28,558 INFO L226 Difference]: Without dead ends: 295 [2021-07-13 19:59:28,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:59:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-07-13 19:59:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 226. [2021-07-13 19:59:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.111111111111111) internal successors, (475), 225 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 475 transitions. [2021-07-13 19:59:28,563 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 475 transitions. Word has length 35 [2021-07-13 19:59:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:28,563 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 475 transitions. [2021-07-13 19:59:28,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,564 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 475 transitions. [2021-07-13 19:59:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 19:59:28,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:28,564 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:28,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:28,781 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash -891441477, now seen corresponding path program 14 times [2021-07-13 19:59:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:28,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011752557] [2021-07-13 19:59:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:28,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:28,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011752557] [2021-07-13 19:59:28,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011752557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:28,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255000272] [2021-07-13 19:59:28,899 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:28,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:28,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:59:28,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:29,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255000272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:29,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:29,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-13 19:59:29,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639484793] [2021-07-13 19:59:29,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:59:29,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:29,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:59:29,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:59:29,216 INFO L87 Difference]: Start difference. First operand 226 states and 475 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:30,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:30,716 INFO L93 Difference]: Finished difference Result 1040 states and 2018 transitions. [2021-07-13 19:59:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 19:59:30,716 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 19:59:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:30,719 INFO L225 Difference]: With dead ends: 1040 [2021-07-13 19:59:30,719 INFO L226 Difference]: Without dead ends: 884 [2021-07-13 19:59:30,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1278.5ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 19:59:30,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-07-13 19:59:30,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 159. [2021-07-13 19:59:30,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0126582278481013) internal successors, (318), 158 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 318 transitions. [2021-07-13 19:59:30,727 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 318 transitions. Word has length 37 [2021-07-13 19:59:30,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:30,727 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 318 transitions. [2021-07-13 19:59:30,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:30,727 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 318 transitions. [2021-07-13 19:59:30,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 19:59:30,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:30,727 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:30,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:59:30,937 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:30,938 INFO L82 PathProgramCache]: Analyzing trace with hash 843829749, now seen corresponding path program 15 times [2021-07-13 19:59:30,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:30,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641925511] [2021-07-13 19:59:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:31,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:31,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641925511] [2021-07-13 19:59:31,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641925511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:31,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864092409] [2021-07-13 19:59:31,003 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:31,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:59:31,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:59:31,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:31,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864092409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:31,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:31,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-07-13 19:59:31,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910376843] [2021-07-13 19:59:31,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:59:31,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:31,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:59:31,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:59:31,248 INFO L87 Difference]: Start difference. First operand 159 states and 318 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:32,530 INFO L93 Difference]: Finished difference Result 642 states and 1258 transitions. [2021-07-13 19:59:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 19:59:32,530 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 19:59:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:32,532 INFO L225 Difference]: With dead ends: 642 [2021-07-13 19:59:32,532 INFO L226 Difference]: Without dead ends: 638 [2021-07-13 19:59:32,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 1160.6ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 19:59:32,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-07-13 19:59:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 139. [2021-07-13 19:59:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-07-13 19:59:32,538 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 37 [2021-07-13 19:59:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:32,538 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-07-13 19:59:32,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:32,538 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-07-13 19:59:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:59:32,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:32,538 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:32,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:59:32,749 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:32,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1395388281, now seen corresponding path program 16 times [2021-07-13 19:59:32,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:32,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519197871] [2021-07-13 19:59:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:32,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:32,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519197871] [2021-07-13 19:59:32,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519197871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:32,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564490227] [2021-07-13 19:59:32,811 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:32,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:32,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:32,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:59:32,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:32,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564490227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:32,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:32,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:59:32,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607390594] [2021-07-13 19:59:32,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:59:32,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:32,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:59:32,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:59:32,899 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:32,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:32,974 INFO L93 Difference]: Finished difference Result 399 states and 778 transitions. [2021-07-13 19:59:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:59:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:59:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:32,976 INFO L225 Difference]: With dead ends: 399 [2021-07-13 19:59:32,976 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 19:59:32,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:59:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 19:59:32,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 266. [2021-07-13 19:59:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.120754716981132) internal successors, (562), 265 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:32,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 562 transitions. [2021-07-13 19:59:32,986 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 562 transitions. Word has length 39 [2021-07-13 19:59:32,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:32,986 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 562 transitions. [2021-07-13 19:59:32,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 562 transitions. [2021-07-13 19:59:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:32,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:32,987 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:33,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:33,196 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:33,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1201339771, now seen corresponding path program 17 times [2021-07-13 19:59:33,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:33,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613539522] [2021-07-13 19:59:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:33,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:33,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613539522] [2021-07-13 19:59:33,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613539522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:33,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763085753] [2021-07-13 19:59:33,339 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:33,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:59:33,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:33,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:59:33,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:33,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763085753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:33,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:33,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-13 19:59:33,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736113545] [2021-07-13 19:59:33,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 19:59:33,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:33,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 19:59:33,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:59:33,707 INFO L87 Difference]: Start difference. First operand 266 states and 562 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:35,560 INFO L93 Difference]: Finished difference Result 1321 states and 2572 transitions. [2021-07-13 19:59:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 19:59:35,560 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 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 41 [2021-07-13 19:59:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:35,563 INFO L225 Difference]: With dead ends: 1321 [2021-07-13 19:59:35,563 INFO L226 Difference]: Without dead ends: 1111 [2021-07-13 19:59:35,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 1684.9ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-07-13 19:59:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-07-13 19:59:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 181. [2021-07-13 19:59:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.022222222222222) internal successors, (364), 180 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 364 transitions. [2021-07-13 19:59:35,572 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 364 transitions. Word has length 41 [2021-07-13 19:59:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:35,572 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 364 transitions. [2021-07-13 19:59:35,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 364 transitions. [2021-07-13 19:59:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:35,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:35,573 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:35,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:35,785 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:35,785 INFO L82 PathProgramCache]: Analyzing trace with hash -860600583, now seen corresponding path program 18 times [2021-07-13 19:59:35,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:35,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924413936] [2021-07-13 19:59:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:35,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:35,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924413936] [2021-07-13 19:59:35,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924413936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:35,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691470062] [2021-07-13 19:59:35,869 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:35,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:59:35,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:35,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:59:35,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:36,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691470062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:36,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:36,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-07-13 19:59:36,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544130775] [2021-07-13 19:59:36,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:59:36,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:36,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:59:36,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:59:36,180 INFO L87 Difference]: Start difference. First operand 181 states and 364 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 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) [2021-07-13 19:59:37,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:37,959 INFO L93 Difference]: Finished difference Result 820 states and 1614 transitions. [2021-07-13 19:59:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 19:59:37,959 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 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) Word has length 41 [2021-07-13 19:59:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:37,962 INFO L225 Difference]: With dead ends: 820 [2021-07-13 19:59:37,962 INFO L226 Difference]: Without dead ends: 816 [2021-07-13 19:59:37,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3760 ImplicationChecksByTransitivity, 1561.5ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-07-13 19:59:37,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-07-13 19:59:37,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 157. [2021-07-13 19:59:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 317 transitions. [2021-07-13 19:59:37,989 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 317 transitions. Word has length 41 [2021-07-13 19:59:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:37,989 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 317 transitions. [2021-07-13 19:59:37,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 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) [2021-07-13 19:59:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 317 transitions. [2021-07-13 19:59:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-13 19:59:37,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:37,990 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:38,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:38,207 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:38,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:38,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1781494215, now seen corresponding path program 19 times [2021-07-13 19:59:38,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:38,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965396791] [2021-07-13 19:59:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:38,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:38,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965396791] [2021-07-13 19:59:38,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965396791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:38,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287729732] [2021-07-13 19:59:38,286 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:59:38,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:38,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287729732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:38,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:38,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:59:38,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032405845] [2021-07-13 19:59:38,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:59:38,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:59:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:59:38,386 INFO L87 Difference]: Start difference. First operand 157 states and 317 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:38,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:38,466 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2021-07-13 19:59:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:59:38,467 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-13 19:59:38,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:38,468 INFO L225 Difference]: With dead ends: 458 [2021-07-13 19:59:38,468 INFO L226 Difference]: Without dead ends: 401 [2021-07-13 19:59:38,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:59:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-13 19:59:38,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 306. [2021-07-13 19:59:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.1278688524590166) internal successors, (649), 305 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 649 transitions. [2021-07-13 19:59:38,473 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 649 transitions. Word has length 43 [2021-07-13 19:59:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:38,473 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 649 transitions. [2021-07-13 19:59:38,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 649 transitions. [2021-07-13 19:59:38,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 19:59:38,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:38,474 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:38,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:59:38,689 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:38,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:38,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2145072325, now seen corresponding path program 20 times [2021-07-13 19:59:38,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:38,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031333067] [2021-07-13 19:59:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:38,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:38,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031333067] [2021-07-13 19:59:38,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031333067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:38,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683889528] [2021-07-13 19:59:38,857 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:38,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:38,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:38,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:59:38,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:39,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683889528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:39,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:39,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-13 19:59:39,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784371216] [2021-07-13 19:59:39,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 19:59:39,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:39,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 19:59:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:59:39,230 INFO L87 Difference]: Start difference. First operand 306 states and 649 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 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) [2021-07-13 19:59:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:41,683 INFO L93 Difference]: Finished difference Result 1630 states and 3182 transitions. [2021-07-13 19:59:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-07-13 19:59:41,683 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 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) Word has length 45 [2021-07-13 19:59:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:41,687 INFO L225 Difference]: With dead ends: 1630 [2021-07-13 19:59:41,687 INFO L226 Difference]: Without dead ends: 1360 [2021-07-13 19:59:41,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 2196.9ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-07-13 19:59:41,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-07-13 19:59:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 203. [2021-07-13 19:59:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.0297029702970297) internal successors, (410), 202 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 410 transitions. [2021-07-13 19:59:41,695 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 410 transitions. Word has length 45 [2021-07-13 19:59:41,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:41,695 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 410 transitions. [2021-07-13 19:59:41,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 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) [2021-07-13 19:59:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 410 transitions. [2021-07-13 19:59:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 19:59:41,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:41,696 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:41,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:59:41,917 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:41,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:41,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1689827837, now seen corresponding path program 21 times [2021-07-13 19:59:41,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:41,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173723315] [2021-07-13 19:59:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:42,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:42,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173723315] [2021-07-13 19:59:42,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173723315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:42,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262695984] [2021-07-13 19:59:42,000 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:42,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 19:59:42,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:42,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:59:42,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:42,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262695984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:42,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:42,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-07-13 19:59:42,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964858972] [2021-07-13 19:59:42,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:59:42,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:42,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:59:42,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:59:42,376 INFO L87 Difference]: Start difference. First operand 203 states and 410 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:44,650 INFO L93 Difference]: Finished difference Result 1020 states and 2014 transitions. [2021-07-13 19:59:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-13 19:59:44,658 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 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 45 [2021-07-13 19:59:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:44,661 INFO L225 Difference]: With dead ends: 1020 [2021-07-13 19:59:44,661 INFO L226 Difference]: Without dead ends: 1016 [2021-07-13 19:59:44,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 2109.4ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-07-13 19:59:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-07-13 19:59:44,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 175. [2021-07-13 19:59:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0402298850574714) internal successors, (355), 174 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 355 transitions. [2021-07-13 19:59:44,681 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 355 transitions. Word has length 45 [2021-07-13 19:59:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:44,682 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 355 transitions. [2021-07-13 19:59:44,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 355 transitions. [2021-07-13 19:59:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:59:44,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:44,682 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:44,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:44,912 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash -753013767, now seen corresponding path program 22 times [2021-07-13 19:59:44,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:44,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817512687] [2021-07-13 19:59:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:45,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:45,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817512687] [2021-07-13 19:59:45,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817512687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:45,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374851191] [2021-07-13 19:59:45,028 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:45,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:45,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:45,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:59:45,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:45,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374851191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:45,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:45,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:59:45,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114824210] [2021-07-13 19:59:45,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:59:45,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:45,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:59:45,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:59:45,155 INFO L87 Difference]: Start difference. First operand 175 states and 355 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:45,248 INFO L93 Difference]: Finished difference Result 517 states and 1012 transitions. [2021-07-13 19:59:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:59:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:59:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:45,250 INFO L225 Difference]: With dead ends: 517 [2021-07-13 19:59:45,250 INFO L226 Difference]: Without dead ends: 454 [2021-07-13 19:59:45,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:59:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-13 19:59:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 346. [2021-07-13 19:59:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.1333333333333333) internal successors, (736), 345 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 736 transitions. [2021-07-13 19:59:45,255 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 736 transitions. Word has length 47 [2021-07-13 19:59:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:45,255 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 736 transitions. [2021-07-13 19:59:45,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 736 transitions. [2021-07-13 19:59:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-13 19:59:45,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:45,255 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:45,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:59:45,469 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash -819472389, now seen corresponding path program 23 times [2021-07-13 19:59:45,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:45,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903792458] [2021-07-13 19:59:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:45,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:45,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903792458] [2021-07-13 19:59:45,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903792458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:45,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511987685] [2021-07-13 19:59:45,643 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:45,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:59:45,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:45,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:59:45,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:46,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511987685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:46,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:46,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-07-13 19:59:46,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692659747] [2021-07-13 19:59:46,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 19:59:46,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:46,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 19:59:46,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:59:46,035 INFO L87 Difference]: Start difference. First operand 346 states and 736 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:49,153 INFO L93 Difference]: Finished difference Result 1967 states and 3848 transitions. [2021-07-13 19:59:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-07-13 19:59:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-07-13 19:59:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:49,158 INFO L225 Difference]: With dead ends: 1967 [2021-07-13 19:59:49,158 INFO L226 Difference]: Without dead ends: 1631 [2021-07-13 19:59:49,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 2770.3ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-07-13 19:59:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-07-13 19:59:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 225. [2021-07-13 19:59:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2021-07-13 19:59:49,167 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 49 [2021-07-13 19:59:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:49,167 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2021-07-13 19:59:49,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2021-07-13 19:59:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-13 19:59:49,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:49,168 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:49,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:49,371 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:49,372 INFO L82 PathProgramCache]: Analyzing trace with hash 522332929, now seen corresponding path program 24 times [2021-07-13 19:59:49,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:49,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631624380] [2021-07-13 19:59:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:49,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:49,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631624380] [2021-07-13 19:59:49,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631624380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:49,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214070168] [2021-07-13 19:59:49,472 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 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 [2021-07-13 19:59:49,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 19:59:49,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:49,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:59:49,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:49,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214070168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:49,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:49,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-07-13 19:59:49,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884564988] [2021-07-13 19:59:49,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 19:59:49,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:49,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 19:59:49,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:59:49,877 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:52,708 INFO L93 Difference]: Finished difference Result 1242 states and 2458 transitions. [2021-07-13 19:59:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-13 19:59:52,708 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 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 49 [2021-07-13 19:59:52,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:52,711 INFO L225 Difference]: With dead ends: 1242 [2021-07-13 19:59:52,711 INFO L226 Difference]: Without dead ends: 1238 [2021-07-13 19:59:52,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8651 ImplicationChecksByTransitivity, 2638.7ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-07-13 19:59:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-07-13 19:59:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 193. [2021-07-13 19:59:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.046875) internal successors, (393), 192 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 393 transitions. [2021-07-13 19:59:52,718 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 393 transitions. Word has length 49 [2021-07-13 19:59:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:52,718 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 393 transitions. [2021-07-13 19:59:52,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 393 transitions. [2021-07-13 19:59:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-13 19:59:52,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:52,718 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:52,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:59:52,930 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:52,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1838205113, now seen corresponding path program 25 times [2021-07-13 19:59:52,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:52,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551590470] [2021-07-13 19:59:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:53,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:53,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551590470] [2021-07-13 19:59:53,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551590470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:53,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890521498] [2021-07-13 19:59:53,022 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 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 [2021-07-13 19:59:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:53,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 19:59:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:53,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890521498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:53,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:53,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:59:53,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971965389] [2021-07-13 19:59:53,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:59:53,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:53,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:59:53,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:59:53,112 INFO L87 Difference]: Start difference. First operand 193 states and 393 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:53,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:53,227 INFO L93 Difference]: Finished difference Result 576 states and 1129 transitions. [2021-07-13 19:59:53,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:59:53,227 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-07-13 19:59:53,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:53,229 INFO L225 Difference]: With dead ends: 576 [2021-07-13 19:59:53,229 INFO L226 Difference]: Without dead ends: 507 [2021-07-13 19:59:53,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:59:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-07-13 19:59:53,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 386. [2021-07-13 19:59:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.137662337662338) internal successors, (823), 385 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 823 transitions. [2021-07-13 19:59:53,236 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 823 transitions. Word has length 51 [2021-07-13 19:59:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:53,236 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 823 transitions. [2021-07-13 19:59:53,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 823 transitions. [2021-07-13 19:59:53,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:59:53,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:53,239 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:53,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:59:53,449 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash 987816891, now seen corresponding path program 26 times [2021-07-13 19:59:53,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:53,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949579946] [2021-07-13 19:59:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:53,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:53,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949579946] [2021-07-13 19:59:53,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949579946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:53,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354109351] [2021-07-13 19:59:53,667 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:53,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:53,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:53,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:59:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:54,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354109351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:54,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:54,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-07-13 19:59:54,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805493698] [2021-07-13 19:59:54,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-13 19:59:54,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:54,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-13 19:59:54,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:59:54,214 INFO L87 Difference]: Start difference. First operand 386 states and 823 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 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) [2021-07-13 19:59:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:58,260 INFO L93 Difference]: Finished difference Result 2332 states and 4570 transitions. [2021-07-13 19:59:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-07-13 19:59:58,261 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 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) Word has length 53 [2021-07-13 19:59:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:58,265 INFO L225 Difference]: With dead ends: 2332 [2021-07-13 19:59:58,266 INFO L226 Difference]: Without dead ends: 1924 [2021-07-13 19:59:58,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12484 ImplicationChecksByTransitivity, 3609.6ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-07-13 19:59:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-07-13 19:59:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 247. [2021-07-13 19:59:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.040650406504065) internal successors, (502), 246 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 502 transitions. [2021-07-13 19:59:58,275 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 502 transitions. Word has length 53 [2021-07-13 19:59:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:58,275 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 502 transitions. [2021-07-13 19:59:58,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 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) [2021-07-13 19:59:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 502 transitions. [2021-07-13 19:59:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:59:58,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:58,276 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:58,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:59:58,485 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:58,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:58,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1237739003, now seen corresponding path program 27 times [2021-07-13 19:59:58,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:58,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867729468] [2021-07-13 19:59:58,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:58,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:58,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867729468] [2021-07-13 19:59:58,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867729468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:58,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030928950] [2021-07-13 19:59:58,588 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:58,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:59:58,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:58,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:59:58,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:59,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030928950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:59,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:59,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-07-13 19:59:59,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611520079] [2021-07-13 19:59:59,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 19:59:59,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 19:59:59,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:59:59,074 INFO L87 Difference]: Start difference. First operand 247 states and 502 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:02,847 INFO L93 Difference]: Finished difference Result 1486 states and 2946 transitions. [2021-07-13 20:00:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-07-13 20:00:02,848 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 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 53 [2021-07-13 20:00:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:02,851 INFO L225 Difference]: With dead ends: 1486 [2021-07-13 20:00:02,852 INFO L226 Difference]: Without dead ends: 1482 [2021-07-13 20:00:02,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12394 ImplicationChecksByTransitivity, 3479.5ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-07-13 20:00:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-07-13 20:00:02,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 211. [2021-07-13 20:00:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.052380952380952) internal successors, (431), 210 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 431 transitions. [2021-07-13 20:00:02,877 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 431 transitions. Word has length 53 [2021-07-13 20:00:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:02,877 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 431 transitions. [2021-07-13 20:00:02,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 431 transitions. [2021-07-13 20:00:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 20:00:02,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:02,878 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:03,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:03,079 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:03,079 INFO L82 PathProgramCache]: Analyzing trace with hash -818551687, now seen corresponding path program 28 times [2021-07-13 20:00:03,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:03,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919635387] [2021-07-13 20:00:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:03,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:03,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919635387] [2021-07-13 20:00:03,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919635387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:03,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614287790] [2021-07-13 20:00:03,215 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:03,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:00:03,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:00:03,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:03,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614287790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:03,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:03,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 20:00:03,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069075958] [2021-07-13 20:00:03,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:00:03,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:03,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:00:03,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:00:03,317 INFO L87 Difference]: Start difference. First operand 211 states and 431 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:03,474 INFO L93 Difference]: Finished difference Result 635 states and 1246 transitions. [2021-07-13 20:00:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:00:03,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-07-13 20:00:03,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:03,476 INFO L225 Difference]: With dead ends: 635 [2021-07-13 20:00:03,477 INFO L226 Difference]: Without dead ends: 560 [2021-07-13 20:00:03,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:00:03,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-13 20:00:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 426. [2021-07-13 20:00:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1411764705882352) internal successors, (910), 425 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 910 transitions. [2021-07-13 20:00:03,482 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 910 transitions. Word has length 55 [2021-07-13 20:00:03,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:03,482 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 910 transitions. [2021-07-13 20:00:03,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 910 transitions. [2021-07-13 20:00:03,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 20:00:03,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:03,483 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:03,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:00:03,685 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:03,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:03,685 INFO L82 PathProgramCache]: Analyzing trace with hash -249778565, now seen corresponding path program 29 times [2021-07-13 20:00:03,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:03,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906637948] [2021-07-13 20:00:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:04,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:04,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906637948] [2021-07-13 20:00:04,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906637948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:04,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350804089] [2021-07-13 20:00:04,045 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:04,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 20:00:04,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:00:04,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:04,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350804089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:04,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:04,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-07-13 20:00:04,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796692481] [2021-07-13 20:00:04,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-13 20:00:04,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-13 20:00:04,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:00:04,633 INFO L87 Difference]: Start difference. First operand 426 states and 910 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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) [2021-07-13 20:00:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:10,194 INFO L93 Difference]: Finished difference Result 2725 states and 5348 transitions. [2021-07-13 20:00:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-07-13 20:00:10,195 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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) Word has length 57 [2021-07-13 20:00:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:10,215 INFO L225 Difference]: With dead ends: 2725 [2021-07-13 20:00:10,215 INFO L226 Difference]: Without dead ends: 2239 [2021-07-13 20:00:10,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17392 ImplicationChecksByTransitivity, 4910.1ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-07-13 20:00:10,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-07-13 20:00:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 269. [2021-07-13 20:00:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.044776119402985) internal successors, (548), 268 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 548 transitions. [2021-07-13 20:00:10,248 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 548 transitions. Word has length 57 [2021-07-13 20:00:10,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:10,248 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 548 transitions. [2021-07-13 20:00:10,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 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) [2021-07-13 20:00:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 548 transitions. [2021-07-13 20:00:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-13 20:00:10,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:10,249 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:10,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:10,465 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:10,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:10,466 INFO L82 PathProgramCache]: Analyzing trace with hash 969410313, now seen corresponding path program 30 times [2021-07-13 20:00:10,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:10,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455508356] [2021-07-13 20:00:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:10,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:10,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455508356] [2021-07-13 20:00:10,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455508356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:10,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349622128] [2021-07-13 20:00:10,698 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:10,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-13 20:00:10,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:10,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:00:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:11,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349622128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:11,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:11,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-07-13 20:00:11,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200323725] [2021-07-13 20:00:11,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 20:00:11,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:11,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 20:00:11,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:00:11,448 INFO L87 Difference]: Start difference. First operand 269 states and 548 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 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) [2021-07-13 20:00:15,477 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-07-13 20:00:16,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:16,811 INFO L93 Difference]: Finished difference Result 1752 states and 3478 transitions. [2021-07-13 20:00:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-07-13 20:00:16,811 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 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) Word has length 57 [2021-07-13 20:00:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:16,814 INFO L225 Difference]: With dead ends: 1752 [2021-07-13 20:00:16,815 INFO L226 Difference]: Without dead ends: 1748 [2021-07-13 20:00:16,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17239 ImplicationChecksByTransitivity, 5159.8ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-07-13 20:00:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-07-13 20:00:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 229. [2021-07-13 20:00:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.057017543859649) internal successors, (469), 228 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 469 transitions. [2021-07-13 20:00:16,848 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 469 transitions. Word has length 57 [2021-07-13 20:00:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:16,849 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 469 transitions. [2021-07-13 20:00:16,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 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) [2021-07-13 20:00:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 469 transitions. [2021-07-13 20:00:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 20:00:16,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:16,850 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:17,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:00:17,066 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -441843911, now seen corresponding path program 31 times [2021-07-13 20:00:17,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:17,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058719902] [2021-07-13 20:00:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:17,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:17,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058719902] [2021-07-13 20:00:17,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058719902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:17,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493582228] [2021-07-13 20:00:17,478 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:17,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:00:17,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:17,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493582228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:17,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:17,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 20:00:17,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969072920] [2021-07-13 20:00:17,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:00:17,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:17,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:00:17,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:00:17,732 INFO L87 Difference]: Start difference. First operand 229 states and 469 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2021-07-13 20:00:17,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:17,991 INFO L93 Difference]: Finished difference Result 694 states and 1363 transitions. [2021-07-13 20:00:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:00:17,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 20:00:17,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:17,993 INFO L225 Difference]: With dead ends: 694 [2021-07-13 20:00:17,993 INFO L226 Difference]: Without dead ends: 613 [2021-07-13 20:00:17,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:00:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-13 20:00:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 466. [2021-07-13 20:00:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.1440860215053763) internal successors, (997), 465 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 997 transitions. [2021-07-13 20:00:17,999 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 997 transitions. Word has length 59 [2021-07-13 20:00:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:17,999 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 997 transitions. [2021-07-13 20:00:17,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2021-07-13 20:00:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 997 transitions. [2021-07-13 20:00:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-13 20:00:18,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:18,000 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:18,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:00:18,217 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:18,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:18,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1019742149, now seen corresponding path program 32 times [2021-07-13 20:00:18,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:18,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72491175] [2021-07-13 20:00:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:18,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:18,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72491175] [2021-07-13 20:00:18,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72491175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:18,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010528368] [2021-07-13 20:00:18,719 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:18,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:18,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:18,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:00:18,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:19,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010528368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:19,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:19,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-07-13 20:00:19,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818697202] [2021-07-13 20:00:19,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-13 20:00:19,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:19,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-13 20:00:19,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:00:19,740 INFO L87 Difference]: Start difference. First operand 466 states and 997 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:27,843 INFO L93 Difference]: Finished difference Result 3146 states and 6182 transitions. [2021-07-13 20:00:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-07-13 20:00:27,844 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 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 61 [2021-07-13 20:00:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:27,848 INFO L225 Difference]: With dead ends: 3146 [2021-07-13 20:00:27,848 INFO L226 Difference]: Without dead ends: 2576 [2021-07-13 20:00:27,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23637 ImplicationChecksByTransitivity, 7410.9ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-07-13 20:00:27,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-07-13 20:00:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 291. [2021-07-13 20:00:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.0482758620689654) internal successors, (594), 290 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 594 transitions. [2021-07-13 20:00:27,884 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 594 transitions. Word has length 61 [2021-07-13 20:00:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:27,884 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 594 transitions. [2021-07-13 20:00:27,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 594 transitions. [2021-07-13 20:00:27,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-13 20:00:27,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:27,885 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:28,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:00:28,101 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash -820612595, now seen corresponding path program 33 times [2021-07-13 20:00:28,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:28,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292379546] [2021-07-13 20:00:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:28,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:28,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292379546] [2021-07-13 20:00:28,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292379546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:28,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416862994] [2021-07-13 20:00:28,251 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:28,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-13 20:00:28,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:28,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:00:28,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:29,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416862994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:29,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:29,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-07-13 20:00:29,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182831553] [2021-07-13 20:00:29,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 20:00:29,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:29,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 20:00:29,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:00:29,454 INFO L87 Difference]: Start difference. First operand 291 states and 594 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:35,664 INFO L93 Difference]: Finished difference Result 2040 states and 4054 transitions. [2021-07-13 20:00:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-07-13 20:00:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 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 61 [2021-07-13 20:00:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:35,667 INFO L225 Difference]: With dead ends: 2040 [2021-07-13 20:00:35,667 INFO L226 Difference]: Without dead ends: 2036 [2021-07-13 20:00:35,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23384 ImplicationChecksByTransitivity, 5998.1ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-07-13 20:00:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-07-13 20:00:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 247. [2021-07-13 20:00:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.0609756097560976) internal successors, (507), 246 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 507 transitions. [2021-07-13 20:00:35,691 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 507 transitions. Word has length 61 [2021-07-13 20:00:35,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:35,691 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 507 transitions. [2021-07-13 20:00:35,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 507 transitions. [2021-07-13 20:00:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 20:00:35,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:35,692 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:35,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:00:35,910 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:35,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1642473223, now seen corresponding path program 34 times [2021-07-13 20:00:35,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:35,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870076772] [2021-07-13 20:00:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:36,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:36,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870076772] [2021-07-13 20:00:36,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870076772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:36,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563894182] [2021-07-13 20:00:36,093 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:36,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:00:36,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:36,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:00:36,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:36,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563894182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:36,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:36,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 20:00:36,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514996517] [2021-07-13 20:00:36,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:00:36,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:36,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:00:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:00:36,217 INFO L87 Difference]: Start difference. First operand 247 states and 507 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:36,492 INFO L93 Difference]: Finished difference Result 753 states and 1480 transitions. [2021-07-13 20:00:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:00:36,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-13 20:00:36,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:36,494 INFO L225 Difference]: With dead ends: 753 [2021-07-13 20:00:36,494 INFO L226 Difference]: Without dead ends: 666 [2021-07-13 20:00:36,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:00:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-07-13 20:00:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 506. [2021-07-13 20:00:36,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.1465346534653467) internal successors, (1084), 505 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1084 transitions. [2021-07-13 20:00:36,521 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1084 transitions. Word has length 63 [2021-07-13 20:00:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:36,521 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1084 transitions. [2021-07-13 20:00:36,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1084 transitions. [2021-07-13 20:00:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:00:36,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:36,522 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:36,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 20:00:36,737 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:36,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:36,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1574993669, now seen corresponding path program 35 times [2021-07-13 20:00:36,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:36,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214936247] [2021-07-13 20:00:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:37,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:37,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214936247] [2021-07-13 20:00:37,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214936247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:37,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007971404] [2021-07-13 20:00:37,127 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:37,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 20:00:37,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:37,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:00:37,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:37,906 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 20:00:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:38,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007971404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:38,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:38,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-07-13 20:00:38,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282120343] [2021-07-13 20:00:38,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-07-13 20:00:38,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:38,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-07-13 20:00:38,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:00:38,463 INFO L87 Difference]: Start difference. First operand 506 states and 1084 transitions. Second operand has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:48,253 INFO L93 Difference]: Finished difference Result 3595 states and 7072 transitions. [2021-07-13 20:00:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-07-13 20:00:48,254 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 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 65 [2021-07-13 20:00:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:48,259 INFO L225 Difference]: With dead ends: 3595 [2021-07-13 20:00:48,259 INFO L226 Difference]: Without dead ends: 2935 [2021-07-13 20:00:48,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31446 ImplicationChecksByTransitivity, 8998.6ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-07-13 20:00:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-07-13 20:00:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 313. [2021-07-13 20:00:48,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.051282051282051) internal successors, (640), 312 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 640 transitions. [2021-07-13 20:00:48,280 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 640 transitions. Word has length 65 [2021-07-13 20:00:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:48,280 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 640 transitions. [2021-07-13 20:00:48,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 640 transitions. [2021-07-13 20:00:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 20:00:48,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:48,281 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:48,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:00:48,493 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1894636305, now seen corresponding path program 36 times [2021-07-13 20:00:48,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:48,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145252921] [2021-07-13 20:00:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:48,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:48,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145252921] [2021-07-13 20:00:48,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145252921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:48,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724058746] [2021-07-13 20:00:48,730 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:48,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 20:00:48,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:48,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:00:48,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:49,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724058746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:49,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:49,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-07-13 20:00:49,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432168557] [2021-07-13 20:00:49,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-13 20:00:49,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:49,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-13 20:00:49,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:00:49,516 INFO L87 Difference]: Start difference. First operand 313 states and 640 transitions. Second operand has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 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) [2021-07-13 20:00:52,293 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-07-13 20:00:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:57,711 INFO L93 Difference]: Finished difference Result 2350 states and 4674 transitions. [2021-07-13 20:00:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-07-13 20:00:57,712 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 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) Word has length 65 [2021-07-13 20:00:57,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:57,730 INFO L225 Difference]: With dead ends: 2350 [2021-07-13 20:00:57,730 INFO L226 Difference]: Without dead ends: 2346 [2021-07-13 20:00:57,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31044 ImplicationChecksByTransitivity, 7737.2ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-07-13 20:00:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-07-13 20:00:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 265. [2021-07-13 20:00:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.0643939393939394) internal successors, (545), 264 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 545 transitions. [2021-07-13 20:00:57,771 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 545 transitions. Word has length 65 [2021-07-13 20:00:57,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:57,771 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 545 transitions. [2021-07-13 20:00:57,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 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) [2021-07-13 20:00:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 545 transitions. [2021-07-13 20:00:57,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-13 20:00:57,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:57,772 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:57,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:00:57,972 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1631728057, now seen corresponding path program 37 times [2021-07-13 20:00:57,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:57,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481199485] [2021-07-13 20:00:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:58,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:58,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481199485] [2021-07-13 20:00:58,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481199485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:58,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947096030] [2021-07-13 20:00:58,166 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:58,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:00:58,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:58,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947096030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:58,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:58,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-13 20:00:58,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216786612] [2021-07-13 20:00:58,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:00:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:00:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:00:58,289 INFO L87 Difference]: Start difference. First operand 265 states and 545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:58,579 INFO L93 Difference]: Finished difference Result 812 states and 1597 transitions. [2021-07-13 20:00:58,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:00:58,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-07-13 20:00:58,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:58,589 INFO L225 Difference]: With dead ends: 812 [2021-07-13 20:00:58,589 INFO L226 Difference]: Without dead ends: 719 [2021-07-13 20:00:58,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:00:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-07-13 20:00:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 546. [2021-07-13 20:00:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.148623853211009) internal successors, (1171), 545 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1171 transitions. [2021-07-13 20:00:58,597 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1171 transitions. Word has length 67 [2021-07-13 20:00:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:58,597 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1171 transitions. [2021-07-13 20:00:58,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1171 transitions. [2021-07-13 20:00:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-13 20:00:58,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:58,598 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:58,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:00:58,798 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:58,799 INFO L82 PathProgramCache]: Analyzing trace with hash 441452731, now seen corresponding path program 38 times [2021-07-13 20:00:58,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:58,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191250847] [2021-07-13 20:00:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:59,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:59,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191250847] [2021-07-13 20:00:59,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191250847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:59,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113887293] [2021-07-13 20:00:59,414 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:59,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:00:59,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:59,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:00:59,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:00,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113887293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:00,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:00,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-07-13 20:01:00,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377414677] [2021-07-13 20:01:00,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-07-13 20:01:00,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:00,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-07-13 20:01:00,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:01:00,434 INFO L87 Difference]: Start difference. First operand 546 states and 1171 transitions. Second operand has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:11,199 INFO L93 Difference]: Finished difference Result 4072 states and 8018 transitions. [2021-07-13 20:01:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-07-13 20:01:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 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 69 [2021-07-13 20:01:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:11,205 INFO L225 Difference]: With dead ends: 4072 [2021-07-13 20:01:11,205 INFO L226 Difference]: Without dead ends: 3316 [2021-07-13 20:01:11,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41063 ImplicationChecksByTransitivity, 9444.4ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-07-13 20:01:11,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-07-13 20:01:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 335. [2021-07-13 20:01:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.053892215568862) internal successors, (686), 334 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 686 transitions. [2021-07-13 20:01:11,228 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 686 transitions. Word has length 69 [2021-07-13 20:01:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:11,228 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 686 transitions. [2021-07-13 20:01:11,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 686 transitions. [2021-07-13 20:01:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-13 20:01:11,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:11,229 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:11,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:11,447 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:11,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:11,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1349041643, now seen corresponding path program 39 times [2021-07-13 20:01:11,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:11,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551704868] [2021-07-13 20:01:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:11,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:11,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551704868] [2021-07-13 20:01:11,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551704868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:11,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587611941] [2021-07-13 20:01:11,766 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:11,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-13 20:01:11,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:11,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:01:11,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:12,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587611941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:12,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:12,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-07-13 20:01:12,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491954883] [2021-07-13 20:01:12,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-13 20:01:12,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:12,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-13 20:01:12,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:01:12,717 INFO L87 Difference]: Start difference. First operand 335 states and 686 transitions. Second operand has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:20,952 INFO L93 Difference]: Finished difference Result 2682 states and 5338 transitions. [2021-07-13 20:01:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-07-13 20:01:20,952 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 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 69 [2021-07-13 20:01:20,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:20,956 INFO L225 Difference]: With dead ends: 2682 [2021-07-13 20:01:20,956 INFO L226 Difference]: Without dead ends: 2678 [2021-07-13 20:01:20,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40450 ImplicationChecksByTransitivity, 7801.6ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-07-13 20:01:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-07-13 20:01:20,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 283. [2021-07-13 20:01:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.0673758865248226) internal successors, (583), 282 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:20,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 583 transitions. [2021-07-13 20:01:20,973 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 583 transitions. Word has length 69 [2021-07-13 20:01:20,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:20,973 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 583 transitions. [2021-07-13 20:01:20,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:20,973 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 583 transitions. [2021-07-13 20:01:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-13 20:01:20,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:20,974 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:21,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:21,193 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:21,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:21,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1888499335, now seen corresponding path program 40 times [2021-07-13 20:01:21,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:21,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089019923] [2021-07-13 20:01:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:21,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:21,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:21,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089019923] [2021-07-13 20:01:21,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089019923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:21,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673312152] [2021-07-13 20:01:21,427 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:21,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:01:21,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:21,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-13 20:01:21,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:21,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673312152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:21,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:21,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-13 20:01:21,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880799235] [2021-07-13 20:01:21,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:01:21,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:21,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:01:21,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:01:21,572 INFO L87 Difference]: Start difference. First operand 283 states and 583 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:21,847 INFO L93 Difference]: Finished difference Result 871 states and 1714 transitions. [2021-07-13 20:01:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:01:21,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-07-13 20:01:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:21,849 INFO L225 Difference]: With dead ends: 871 [2021-07-13 20:01:21,849 INFO L226 Difference]: Without dead ends: 772 [2021-07-13 20:01:21,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:01:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-07-13 20:01:21,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 586. [2021-07-13 20:01:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.1504273504273503) internal successors, (1258), 585 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1258 transitions. [2021-07-13 20:01:21,856 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1258 transitions. Word has length 71 [2021-07-13 20:01:21,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:21,856 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1258 transitions. [2021-07-13 20:01:21,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:21,856 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1258 transitions. [2021-07-13 20:01:21,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-07-13 20:01:21,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:21,857 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:22,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:01:22,081 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:22,081 INFO L82 PathProgramCache]: Analyzing trace with hash -808038533, now seen corresponding path program 41 times [2021-07-13 20:01:22,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:22,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480500282] [2021-07-13 20:01:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:22,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:22,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480500282] [2021-07-13 20:01:22,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480500282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:22,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184927957] [2021-07-13 20:01:22,515 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:22,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-13 20:01:22,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:22,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:22,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:23,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184927957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:23,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:23,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-07-13 20:01:23,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266310437] [2021-07-13 20:01:23,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-07-13 20:01:23,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:23,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-07-13 20:01:23,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:01:23,625 INFO L87 Difference]: Start difference. First operand 586 states and 1258 transitions. Second operand has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:35,723 INFO L93 Difference]: Finished difference Result 4577 states and 9020 transitions. [2021-07-13 20:01:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-07-13 20:01:35,725 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 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 73 [2021-07-13 20:01:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:35,730 INFO L225 Difference]: With dead ends: 4577 [2021-07-13 20:01:35,731 INFO L226 Difference]: Without dead ends: 3719 [2021-07-13 20:01:35,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52751 ImplicationChecksByTransitivity, 10298.0ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-07-13 20:01:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-07-13 20:01:35,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 357. [2021-07-13 20:01:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.056179775280899) internal successors, (732), 356 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 732 transitions. [2021-07-13 20:01:35,763 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 732 transitions. Word has length 73 [2021-07-13 20:01:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:35,763 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 732 transitions. [2021-07-13 20:01:35,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 732 transitions. [2021-07-13 20:01:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-07-13 20:01:35,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:35,764 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:35,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:35,977 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1893443353, now seen corresponding path program 42 times [2021-07-13 20:01:35,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:35,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631366439] [2021-07-13 20:01:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:36,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:36,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631366439] [2021-07-13 20:01:36,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631366439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:36,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194523328] [2021-07-13 20:01:36,154 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:36,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-07-13 20:01:36,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:01:36,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:37,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194523328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:37,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:37,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-07-13 20:01:37,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227319948] [2021-07-13 20:01:37,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-13 20:01:37,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:37,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-13 20:01:37,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:01:37,057 INFO L87 Difference]: Start difference. First operand 357 states and 732 transitions. Second operand has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:47,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:47,473 INFO L93 Difference]: Finished difference Result 3036 states and 6046 transitions. [2021-07-13 20:01:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-07-13 20:01:47,473 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 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 73 [2021-07-13 20:01:47,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:47,477 INFO L225 Difference]: With dead ends: 3036 [2021-07-13 20:01:47,477 INFO L226 Difference]: Without dead ends: 3032 [2021-07-13 20:01:47,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51850 ImplicationChecksByTransitivity, 9750.9ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-07-13 20:01:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-07-13 20:01:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 301. [2021-07-13 20:01:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.07) internal successors, (621), 300 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 621 transitions. [2021-07-13 20:01:47,521 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 621 transitions. Word has length 73 [2021-07-13 20:01:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:47,522 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 621 transitions. [2021-07-13 20:01:47,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 621 transitions. [2021-07-13 20:01:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-07-13 20:01:47,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:47,523 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:47,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:47,749 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:47,749 INFO L82 PathProgramCache]: Analyzing trace with hash -58761159, now seen corresponding path program 43 times [2021-07-13 20:01:47,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:47,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615211244] [2021-07-13 20:01:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:48,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:48,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615211244] [2021-07-13 20:01:48,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615211244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:48,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836790353] [2021-07-13 20:01:48,110 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:48,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 63 conjunts are in the unsatisfiable core [2021-07-13 20:01:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:48,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836790353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:48,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:48,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-07-13 20:01:48,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722767460] [2021-07-13 20:01:48,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:01:48,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:48,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:01:48,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:01:48,340 INFO L87 Difference]: Start difference. First operand 301 states and 621 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 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) [2021-07-13 20:01:48,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:01:48,687 INFO L93 Difference]: Finished difference Result 930 states and 1831 transitions. [2021-07-13 20:01:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:01:48,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 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) Word has length 75 [2021-07-13 20:01:48,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:01:48,688 INFO L225 Difference]: With dead ends: 930 [2021-07-13 20:01:48,689 INFO L226 Difference]: Without dead ends: 825 [2021-07-13 20:01:48,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:01:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-07-13 20:01:48,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 626. [2021-07-13 20:01:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.152) internal successors, (1345), 625 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:01:48,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1345 transitions. [2021-07-13 20:01:48,699 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1345 transitions. Word has length 75 [2021-07-13 20:01:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:01:48,699 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1345 transitions. [2021-07-13 20:01:48,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 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) [2021-07-13 20:01:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1345 transitions. [2021-07-13 20:01:48,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-07-13 20:01:48,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:01:48,700 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:01:48,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 20:01:48,925 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:01:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:01:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash -95480517, now seen corresponding path program 44 times [2021-07-13 20:01:48,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:01:48,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841997253] [2021-07-13 20:01:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:01:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:01:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:49,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:01:49,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841997253] [2021-07-13 20:01:49,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841997253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:49,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869077555] [2021-07-13 20:01:49,585 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:01:49,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:01:49,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:01:49,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:01:49,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:01:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:01:50,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869077555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:01:50,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:01:50,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-07-13 20:01:50,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247667130] [2021-07-13 20:01:50,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-13 20:01:50,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:01:50,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-13 20:01:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:01:50,837 INFO L87 Difference]: Start difference. First operand 626 states and 1345 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:06,170 INFO L93 Difference]: Finished difference Result 5110 states and 10078 transitions. [2021-07-13 20:02:06,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-07-13 20:02:06,170 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 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 77 [2021-07-13 20:02:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:06,175 INFO L225 Difference]: With dead ends: 5110 [2021-07-13 20:02:06,175 INFO L226 Difference]: Without dead ends: 4144 [2021-07-13 20:02:06,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66790 ImplicationChecksByTransitivity, 13459.7ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-07-13 20:02:06,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-07-13 20:02:06,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 379. [2021-07-13 20:02:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.058201058201058) internal successors, (778), 378 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 778 transitions. [2021-07-13 20:02:06,199 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 778 transitions. Word has length 77 [2021-07-13 20:02:06,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:06,199 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 778 transitions. [2021-07-13 20:02:06,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:06,199 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 778 transitions. [2021-07-13 20:02:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-07-13 20:02:06,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:06,200 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:06,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 20:02:06,410 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:06,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1341912547, now seen corresponding path program 45 times [2021-07-13 20:02:06,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:06,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409617374] [2021-07-13 20:02:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:06,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:06,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409617374] [2021-07-13 20:02:06,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409617374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:06,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675348414] [2021-07-13 20:02:06,654 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:06,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-07-13 20:02:06,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:02:06,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:07,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675348414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:07,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:07,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-07-13 20:02:07,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397658008] [2021-07-13 20:02:07,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-13 20:02:07,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:07,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-13 20:02:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:02:07,741 INFO L87 Difference]: Start difference. First operand 379 states and 778 transitions. Second operand has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:20,046 INFO L93 Difference]: Finished difference Result 3412 states and 6798 transitions. [2021-07-13 20:02:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-07-13 20:02:20,046 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 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 77 [2021-07-13 20:02:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:20,050 INFO L225 Difference]: With dead ends: 3412 [2021-07-13 20:02:20,050 INFO L226 Difference]: Without dead ends: 3408 [2021-07-13 20:02:20,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65508 ImplicationChecksByTransitivity, 11379.3ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-07-13 20:02:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-07-13 20:02:20,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 319. [2021-07-13 20:02:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.0723270440251573) internal successors, (659), 318 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 659 transitions. [2021-07-13 20:02:20,068 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 659 transitions. Word has length 77 [2021-07-13 20:02:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:20,068 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 659 transitions. [2021-07-13 20:02:20,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 659 transitions. [2021-07-13 20:02:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-07-13 20:02:20,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:20,069 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:20,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:02:20,286 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:20,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1809692153, now seen corresponding path program 46 times [2021-07-13 20:02:20,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:20,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480985790] [2021-07-13 20:02:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:20,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:20,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480985790] [2021-07-13 20:02:20,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480985790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:20,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357330253] [2021-07-13 20:02:20,578 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:20,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:20,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:20,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-13 20:02:20,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:20,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357330253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:20,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:20,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-07-13 20:02:20,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539266211] [2021-07-13 20:02:20,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:02:20,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:02:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:02:20,754 INFO L87 Difference]: Start difference. First operand 319 states and 659 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:21,126 INFO L93 Difference]: Finished difference Result 989 states and 1948 transitions. [2021-07-13 20:02:21,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:02:21,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-07-13 20:02:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:21,128 INFO L225 Difference]: With dead ends: 989 [2021-07-13 20:02:21,128 INFO L226 Difference]: Without dead ends: 878 [2021-07-13 20:02:21,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:02:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-13 20:02:21,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 666. [2021-07-13 20:02:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.1533834586466165) internal successors, (1432), 665 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1432 transitions. [2021-07-13 20:02:21,135 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1432 transitions. Word has length 79 [2021-07-13 20:02:21,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:21,135 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 1432 transitions. [2021-07-13 20:02:21,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1432 transitions. [2021-07-13 20:02:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-07-13 20:02:21,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:21,136 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:21,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:21,352 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash -521725445, now seen corresponding path program 47 times [2021-07-13 20:02:21,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:21,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545241955] [2021-07-13 20:02:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:22,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:22,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545241955] [2021-07-13 20:02:22,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545241955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:22,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064893424] [2021-07-13 20:02:22,008 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:22,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-07-13 20:02:22,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:22,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:02:22,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:23,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064893424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:23,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:23,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-07-13 20:02:23,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346735024] [2021-07-13 20:02:23,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-07-13 20:02:23,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:23,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-07-13 20:02:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:02:23,251 INFO L87 Difference]: Start difference. First operand 666 states and 1432 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:40,522 INFO L93 Difference]: Finished difference Result 5671 states and 11192 transitions. [2021-07-13 20:02:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-07-13 20:02:40,522 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 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 81 [2021-07-13 20:02:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:40,528 INFO L225 Difference]: With dead ends: 5671 [2021-07-13 20:02:40,528 INFO L226 Difference]: Without dead ends: 4591 [2021-07-13 20:02:40,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83479 ImplicationChecksByTransitivity, 14663.2ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-07-13 20:02:40,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-07-13 20:02:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 401. [2021-07-13 20:02:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.06) internal successors, (824), 400 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 824 transitions. [2021-07-13 20:02:40,563 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 824 transitions. Word has length 81 [2021-07-13 20:02:40,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:40,563 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 824 transitions. [2021-07-13 20:02:40,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 824 transitions. [2021-07-13 20:02:40,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-07-13 20:02:40,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:40,564 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:40,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 20:02:40,779 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:40,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1037658913, now seen corresponding path program 48 times [2021-07-13 20:02:40,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:40,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636993114] [2021-07-13 20:02:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:41,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:41,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636993114] [2021-07-13 20:02:41,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636993114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:41,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601668445] [2021-07-13 20:02:41,068 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:41,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-07-13 20:02:41,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:41,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:02:41,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:42,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601668445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:42,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:42,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-07-13 20:02:42,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748482062] [2021-07-13 20:02:42,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-13 20:02:42,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:42,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-13 20:02:42,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:02:42,079 INFO L87 Difference]: Start difference. First operand 401 states and 824 transitions. Second operand has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:54,452 INFO L93 Difference]: Finished difference Result 3810 states and 7594 transitions. [2021-07-13 20:02:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-07-13 20:02:54,452 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 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 81 [2021-07-13 20:02:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:54,457 INFO L225 Difference]: With dead ends: 3810 [2021-07-13 20:02:54,457 INFO L226 Difference]: Without dead ends: 3806 [2021-07-13 20:02:54,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81705 ImplicationChecksByTransitivity, 11444.5ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-07-13 20:02:54,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-07-13 20:02:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 337. [2021-07-13 20:02:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.074404761904762) internal successors, (697), 336 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:54,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 697 transitions. [2021-07-13 20:02:54,479 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 697 transitions. Word has length 81 [2021-07-13 20:02:54,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:54,479 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 697 transitions. [2021-07-13 20:02:54,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 697 transitions. [2021-07-13 20:02:54,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-07-13 20:02:54,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:54,480 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:54,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:54,697 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:54,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:54,698 INFO L82 PathProgramCache]: Analyzing trace with hash 210209465, now seen corresponding path program 49 times [2021-07-13 20:02:54,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:54,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526726116] [2021-07-13 20:02:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:54,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:54,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526726116] [2021-07-13 20:02:54,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526726116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:54,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175293221] [2021-07-13 20:02:54,979 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjunts are in the unsatisfiable core [2021-07-13 20:02:55,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:55,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175293221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:55,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:55,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-07-13 20:02:55,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974599075] [2021-07-13 20:02:55,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:02:55,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:55,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:02:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:02:55,246 INFO L87 Difference]: Start difference. First operand 337 states and 697 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 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) [2021-07-13 20:02:55,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:55,687 INFO L93 Difference]: Finished difference Result 1048 states and 2065 transitions. [2021-07-13 20:02:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:02:55,688 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 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) Word has length 83 [2021-07-13 20:02:55,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:55,689 INFO L225 Difference]: With dead ends: 1048 [2021-07-13 20:02:55,689 INFO L226 Difference]: Without dead ends: 931 [2021-07-13 20:02:55,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:02:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-07-13 20:02:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 706. [2021-07-13 20:02:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.1546099290780143) internal successors, (1519), 705 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1519 transitions. [2021-07-13 20:02:55,697 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1519 transitions. Word has length 83 [2021-07-13 20:02:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:55,697 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 1519 transitions. [2021-07-13 20:02:55,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 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) [2021-07-13 20:02:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1519 transitions. [2021-07-13 20:02:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-07-13 20:02:55,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:55,698 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:55,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:55,913 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:02:55,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:55,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1448811963, now seen corresponding path program 50 times [2021-07-13 20:02:55,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:55,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570774319] [2021-07-13 20:02:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:56,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:56,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570774319] [2021-07-13 20:02:56,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570774319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:56,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55860842] [2021-07-13 20:02:56,614 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:56,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:56,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:56,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:02:56,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:58,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55860842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:58,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:58,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-07-13 20:02:58,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393719771] [2021-07-13 20:02:58,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-07-13 20:02:58,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:58,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-07-13 20:02:58,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:02:58,074 INFO L87 Difference]: Start difference. First operand 706 states and 1519 transitions. Second operand has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:17,049 INFO L93 Difference]: Finished difference Result 6260 states and 12362 transitions. [2021-07-13 20:03:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-07-13 20:03:17,050 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 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 85 [2021-07-13 20:03:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:17,055 INFO L225 Difference]: With dead ends: 6260 [2021-07-13 20:03:17,055 INFO L226 Difference]: Without dead ends: 5060 [2021-07-13 20:03:17,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103134 ImplicationChecksByTransitivity, 15845.9ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-07-13 20:03:17,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2021-07-13 20:03:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 423. [2021-07-13 20:03:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.061611374407583) internal successors, (870), 422 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 870 transitions. [2021-07-13 20:03:17,081 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 870 transitions. Word has length 85 [2021-07-13 20:03:17,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:17,082 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 870 transitions. [2021-07-13 20:03:17,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 870 transitions. [2021-07-13 20:03:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-07-13 20:03:17,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:17,082 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:17,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 20:03:17,299 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:17,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:17,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2136683995, now seen corresponding path program 51 times [2021-07-13 20:03:17,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:17,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166873278] [2021-07-13 20:03:17,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:17,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:17,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166873278] [2021-07-13 20:03:17,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166873278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:17,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064009805] [2021-07-13 20:03:17,546 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:17,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-07-13 20:03:17,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:17,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:03:17,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:18,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064009805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:18,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:18,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-07-13 20:03:18,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963352819] [2021-07-13 20:03:18,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-13 20:03:18,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:18,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-13 20:03:18,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:03:18,665 INFO L87 Difference]: Start difference. First operand 423 states and 870 transitions. Second operand has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:33,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:33,575 INFO L93 Difference]: Finished difference Result 4230 states and 8434 transitions. [2021-07-13 20:03:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-07-13 20:03:33,576 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 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 85 [2021-07-13 20:03:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:33,581 INFO L225 Difference]: With dead ends: 4230 [2021-07-13 20:03:33,581 INFO L226 Difference]: Without dead ends: 4226 [2021-07-13 20:03:33,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100738 ImplicationChecksByTransitivity, 13879.8ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-07-13 20:03:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-07-13 20:03:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 355. [2021-07-13 20:03:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0762711864406778) internal successors, (735), 354 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 735 transitions. [2021-07-13 20:03:33,609 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 735 transitions. Word has length 85 [2021-07-13 20:03:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:33,610 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 735 transitions. [2021-07-13 20:03:33,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 735 transitions. [2021-07-13 20:03:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-07-13 20:03:33,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:33,611 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:33,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:33,825 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash -183918983, now seen corresponding path program 52 times [2021-07-13 20:03:33,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:33,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166547882] [2021-07-13 20:03:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:34,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:34,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166547882] [2021-07-13 20:03:34,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166547882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:34,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483619572] [2021-07-13 20:03:34,328 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:34,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:34,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:34,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-13 20:03:34,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:34,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483619572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:34,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:34,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-07-13 20:03:34,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468453216] [2021-07-13 20:03:34,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:03:34,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:34,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:03:34,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:03:34,572 INFO L87 Difference]: Start difference. First operand 355 states and 735 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 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) [2021-07-13 20:03:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:35,034 INFO L93 Difference]: Finished difference Result 1107 states and 2182 transitions. [2021-07-13 20:03:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:03:35,035 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 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) Word has length 87 [2021-07-13 20:03:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:35,036 INFO L225 Difference]: With dead ends: 1107 [2021-07-13 20:03:35,036 INFO L226 Difference]: Without dead ends: 984 [2021-07-13 20:03:35,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:03:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-07-13 20:03:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 746. [2021-07-13 20:03:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.155704697986577) internal successors, (1606), 745 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1606 transitions. [2021-07-13 20:03:35,044 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1606 transitions. Word has length 87 [2021-07-13 20:03:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:35,044 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1606 transitions. [2021-07-13 20:03:35,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 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) [2021-07-13 20:03:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1606 transitions. [2021-07-13 20:03:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-07-13 20:03:35,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:35,045 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:35,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 20:03:35,253 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:35,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:35,253 INFO L82 PathProgramCache]: Analyzing trace with hash 888660091, now seen corresponding path program 53 times [2021-07-13 20:03:35,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:35,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007673822] [2021-07-13 20:03:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:35,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:35,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007673822] [2021-07-13 20:03:35,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007673822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:35,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13237737] [2021-07-13 20:03:35,941 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:35,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-07-13 20:03:35,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:35,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:35,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:37,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13237737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:37,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:37,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-07-13 20:03:37,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941824222] [2021-07-13 20:03:37,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-07-13 20:03:37,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:37,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-07-13 20:03:37,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:03:37,558 INFO L87 Difference]: Start difference. First operand 746 states and 1606 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:58,756 INFO L93 Difference]: Finished difference Result 6877 states and 13588 transitions. [2021-07-13 20:03:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-07-13 20:03:58,757 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 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 89 [2021-07-13 20:03:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:58,763 INFO L225 Difference]: With dead ends: 6877 [2021-07-13 20:03:58,763 INFO L226 Difference]: Without dead ends: 5551 [2021-07-13 20:03:58,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126090 ImplicationChecksByTransitivity, 17807.1ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-07-13 20:03:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-07-13 20:03:58,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 445. [2021-07-13 20:03:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.063063063063063) internal successors, (916), 444 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 916 transitions. [2021-07-13 20:03:58,795 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 916 transitions. Word has length 89 [2021-07-13 20:03:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:58,795 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 916 transitions. [2021-07-13 20:03:58,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 916 transitions. [2021-07-13 20:03:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-07-13 20:03:58,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:58,796 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:58,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 20:03:58,996 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:03:58,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:58,996 INFO L82 PathProgramCache]: Analyzing trace with hash 875505449, now seen corresponding path program 54 times [2021-07-13 20:03:58,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:58,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846749040] [2021-07-13 20:03:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:03:59,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:59,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846749040] [2021-07-13 20:03:59,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846749040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:59,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152959420] [2021-07-13 20:03:59,246 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:59,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-07-13 20:03:59,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:03:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:00,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152959420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:00,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:00,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-07-13 20:04:00,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702269646] [2021-07-13 20:04:00,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-07-13 20:04:00,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:00,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-07-13 20:04:00,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:04:00,414 INFO L87 Difference]: Start difference. First operand 445 states and 916 transitions. Second operand has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:17,880 INFO L93 Difference]: Finished difference Result 4672 states and 9318 transitions. [2021-07-13 20:04:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-07-13 20:04:17,880 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 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 89 [2021-07-13 20:04:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:17,885 INFO L225 Difference]: With dead ends: 4672 [2021-07-13 20:04:17,885 INFO L226 Difference]: Without dead ends: 4668 [2021-07-13 20:04:17,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122921 ImplicationChecksByTransitivity, 15829.7ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-07-13 20:04:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-07-13 20:04:17,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 373. [2021-07-13 20:04:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.077956989247312) internal successors, (773), 372 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 773 transitions. [2021-07-13 20:04:17,913 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 773 transitions. Word has length 89 [2021-07-13 20:04:17,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:17,914 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 773 transitions. [2021-07-13 20:04:17,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 773 transitions. [2021-07-13 20:04:17,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-07-13 20:04:17,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:17,914 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:18,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:18,119 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:18,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1618955975, now seen corresponding path program 55 times [2021-07-13 20:04:18,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:18,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729265022] [2021-07-13 20:04:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:18,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:18,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729265022] [2021-07-13 20:04:18,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729265022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:18,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992534641] [2021-07-13 20:04:18,384 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:18,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjunts are in the unsatisfiable core [2021-07-13 20:04:18,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:18,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992534641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:18,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:18,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-07-13 20:04:18,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643723698] [2021-07-13 20:04:18,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:04:18,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:18,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:04:18,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:04:18,591 INFO L87 Difference]: Start difference. First operand 373 states and 773 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:19,033 INFO L93 Difference]: Finished difference Result 1166 states and 2299 transitions. [2021-07-13 20:04:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:04:19,033 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-07-13 20:04:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:19,035 INFO L225 Difference]: With dead ends: 1166 [2021-07-13 20:04:19,035 INFO L226 Difference]: Without dead ends: 1037 [2021-07-13 20:04:19,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:04:19,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-07-13 20:04:19,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 786. [2021-07-13 20:04:19,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.156687898089172) internal successors, (1693), 785 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1693 transitions. [2021-07-13 20:04:19,043 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1693 transitions. Word has length 91 [2021-07-13 20:04:19,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:19,043 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1693 transitions. [2021-07-13 20:04:19,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:19,043 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1693 transitions. [2021-07-13 20:04:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-07-13 20:04:19,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:19,044 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:19,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 20:04:19,246 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:19,247 INFO L82 PathProgramCache]: Analyzing trace with hash -627432901, now seen corresponding path program 56 times [2021-07-13 20:04:19,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:19,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766104877] [2021-07-13 20:04:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:19,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:19,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766104877] [2021-07-13 20:04:19,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766104877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:19,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100270543] [2021-07-13 20:04:19,884 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:19,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:04:19,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:19,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:04:19,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:21,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100270543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:21,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:21,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-07-13 20:04:21,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388715235] [2021-07-13 20:04:21,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-07-13 20:04:21,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:21,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-07-13 20:04:21,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:04:21,251 INFO L87 Difference]: Start difference. First operand 786 states and 1693 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:46,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:46,387 INFO L93 Difference]: Finished difference Result 7522 states and 14870 transitions. [2021-07-13 20:04:46,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-07-13 20:04:46,387 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 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 93 [2021-07-13 20:04:46,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:46,394 INFO L225 Difference]: With dead ends: 7522 [2021-07-13 20:04:46,394 INFO L226 Difference]: Without dead ends: 6064 [2021-07-13 20:04:46,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152699 ImplicationChecksByTransitivity, 20356.0ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-07-13 20:04:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2021-07-13 20:04:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 467. [2021-07-13 20:04:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.0643776824034337) internal successors, (962), 466 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 962 transitions. [2021-07-13 20:04:46,428 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 962 transitions. Word has length 93 [2021-07-13 20:04:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:46,428 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 962 transitions. [2021-07-13 20:04:46,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 962 transitions. [2021-07-13 20:04:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-07-13 20:04:46,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:46,429 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:46,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:46,649 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:04:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash 700547629, now seen corresponding path program 57 times [2021-07-13 20:04:46,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:46,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051537268] [2021-07-13 20:04:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:46,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:46,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051537268] [2021-07-13 20:04:46,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051537268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:46,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580445181] [2021-07-13 20:04:46,950 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:46,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-07-13 20:04:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:46,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:04:47,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:04:48,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580445181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:48,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:48,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-07-13 20:04:48,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166858259] [2021-07-13 20:04:48,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-07-13 20:04:48,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:48,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-07-13 20:04:48,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:04:48,207 INFO L87 Difference]: Start difference. First operand 467 states and 962 transitions. Second operand has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:05,053 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-07-13 20:05:08,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:08,750 INFO L93 Difference]: Finished difference Result 5136 states and 10246 transitions. [2021-07-13 20:05:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-07-13 20:05:08,750 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 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 93 [2021-07-13 20:05:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:08,756 INFO L225 Difference]: With dead ends: 5136 [2021-07-13 20:05:08,756 INFO L226 Difference]: Without dead ends: 5132 [2021-07-13 20:05:08,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148584 ImplicationChecksByTransitivity, 18875.2ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-07-13 20:05:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-07-13 20:05:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 391. [2021-07-13 20:05:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0794871794871796) internal successors, (811), 390 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 811 transitions. [2021-07-13 20:05:08,788 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 811 transitions. Word has length 93 [2021-07-13 20:05:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:08,788 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 811 transitions. [2021-07-13 20:05:08,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:08,788 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 811 transitions. [2021-07-13 20:05:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-07-13 20:05:08,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:08,789 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:09,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 20:05:09,003 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:09,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:09,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1704559353, now seen corresponding path program 58 times [2021-07-13 20:05:09,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:09,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770228949] [2021-07-13 20:05:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:09,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:09,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770228949] [2021-07-13 20:05:09,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770228949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:09,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289150851] [2021-07-13 20:05:09,330 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:09,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:05:09,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:09,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 83 conjunts are in the unsatisfiable core [2021-07-13 20:05:09,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:09,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289150851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:09,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:09,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-07-13 20:05:09,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169304477] [2021-07-13 20:05:09,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:05:09,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:09,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:05:09,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:09,529 INFO L87 Difference]: Start difference. First operand 391 states and 811 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:10,096 INFO L93 Difference]: Finished difference Result 1225 states and 2416 transitions. [2021-07-13 20:05:10,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:05:10,096 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-07-13 20:05:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:10,098 INFO L225 Difference]: With dead ends: 1225 [2021-07-13 20:05:10,098 INFO L226 Difference]: Without dead ends: 1090 [2021-07-13 20:05:10,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:05:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-07-13 20:05:10,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 826. [2021-07-13 20:05:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.1575757575757577) internal successors, (1780), 825 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1780 transitions. [2021-07-13 20:05:10,106 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1780 transitions. Word has length 95 [2021-07-13 20:05:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:10,106 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1780 transitions. [2021-07-13 20:05:10,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1780 transitions. [2021-07-13 20:05:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-07-13 20:05:10,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:10,107 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:10,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:10,325 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1532058885, now seen corresponding path program 59 times [2021-07-13 20:05:10,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:10,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610169835] [2021-07-13 20:05:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:11,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:11,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610169835] [2021-07-13 20:05:11,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610169835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:11,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520371853] [2021-07-13 20:05:11,180 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:11,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-07-13 20:05:11,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:11,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:05:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:12,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520371853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:12,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:12,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-07-13 20:05:12,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113883627] [2021-07-13 20:05:12,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-07-13 20:05:12,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:12,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-07-13 20:05:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:05:12,921 INFO L87 Difference]: Start difference. First operand 826 states and 1780 transitions. Second operand has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:05:44,887 INFO L93 Difference]: Finished difference Result 8195 states and 16208 transitions. [2021-07-13 20:05:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-07-13 20:05:44,888 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 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 97 [2021-07-13 20:05:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:05:44,895 INFO L225 Difference]: With dead ends: 8195 [2021-07-13 20:05:44,896 INFO L226 Difference]: Without dead ends: 6599 [2021-07-13 20:05:44,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183332 ImplicationChecksByTransitivity, 25534.3ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-07-13 20:05:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6599 states. [2021-07-13 20:05:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6599 to 489. [2021-07-13 20:05:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.0655737704918034) internal successors, (1008), 488 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1008 transitions. [2021-07-13 20:05:44,937 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1008 transitions. Word has length 97 [2021-07-13 20:05:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:05:44,937 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1008 transitions. [2021-07-13 20:05:44,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:05:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1008 transitions. [2021-07-13 20:05:44,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-07-13 20:05:44,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:05:44,938 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:05:45,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 20:05:45,156 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:05:45,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:05:45,156 INFO L82 PathProgramCache]: Analyzing trace with hash 136633137, now seen corresponding path program 60 times [2021-07-13 20:05:45,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:05:45,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410379136] [2021-07-13 20:05:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:05:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:05:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:45,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:05:45,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410379136] [2021-07-13 20:05:45,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410379136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:45,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400905019] [2021-07-13 20:05:45,610 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:05:45,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-07-13 20:05:45,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:05:45,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:05:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:05:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:05:47,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400905019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:05:47,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:05:47,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-07-13 20:05:47,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639900906] [2021-07-13 20:05:47,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-07-13 20:05:47,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:05:47,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-07-13 20:05:47,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:05:47,160 INFO L87 Difference]: Start difference. First operand 489 states and 1008 transitions. Second operand has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:10,902 INFO L93 Difference]: Finished difference Result 5622 states and 11218 transitions. [2021-07-13 20:06:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 530 states. [2021-07-13 20:06:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 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 97 [2021-07-13 20:06:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:10,909 INFO L225 Difference]: With dead ends: 5622 [2021-07-13 20:06:10,909 INFO L226 Difference]: Without dead ends: 5618 [2021-07-13 20:06:10,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178074 ImplicationChecksByTransitivity, 21688.0ms TimeCoverageRelationStatistics Valid=83624, Invalid=269806, Unknown=0, NotChecked=0, Total=353430 [2021-07-13 20:06:10,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2021-07-13 20:06:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 409. [2021-07-13 20:06:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0808823529411766) internal successors, (849), 408 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 849 transitions. [2021-07-13 20:06:10,975 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 849 transitions. Word has length 97 [2021-07-13 20:06:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:10,975 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 849 transitions. [2021-07-13 20:06:10,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 849 transitions. [2021-07-13 20:06:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-07-13 20:06:10,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:10,976 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:11,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:11,189 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:11,189 INFO L82 PathProgramCache]: Analyzing trace with hash -57617479, now seen corresponding path program 61 times [2021-07-13 20:06:11,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:11,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999101763] [2021-07-13 20:06:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:11,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:11,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999101763] [2021-07-13 20:06:11,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999101763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:11,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10846158] [2021-07-13 20:06:11,583 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:11,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 87 conjunts are in the unsatisfiable core [2021-07-13 20:06:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:11,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10846158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:11,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:11,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-07-13 20:06:11,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750927430] [2021-07-13 20:06:11,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:06:11,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:11,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:06:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:11,771 INFO L87 Difference]: Start difference. First operand 409 states and 849 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 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) [2021-07-13 20:06:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:12,427 INFO L93 Difference]: Finished difference Result 1284 states and 2533 transitions. [2021-07-13 20:06:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:06:12,427 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 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) Word has length 99 [2021-07-13 20:06:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:12,429 INFO L225 Difference]: With dead ends: 1284 [2021-07-13 20:06:12,429 INFO L226 Difference]: Without dead ends: 1143 [2021-07-13 20:06:12,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:06:12,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-07-13 20:06:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 866. [2021-07-13 20:06:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.1583815028901734) internal successors, (1867), 865 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1867 transitions. [2021-07-13 20:06:12,440 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1867 transitions. Word has length 99 [2021-07-13 20:06:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:12,440 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 1867 transitions. [2021-07-13 20:06:12,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 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) [2021-07-13 20:06:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1867 transitions. [2021-07-13 20:06:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-07-13 20:06:12,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:12,441 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:12,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 20:06:12,657 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:12,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1815225019, now seen corresponding path program 62 times [2021-07-13 20:06:12,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:12,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254220709] [2021-07-13 20:06:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:13,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:13,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254220709] [2021-07-13 20:06:13,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254220709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:13,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435220466] [2021-07-13 20:06:13,571 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:13,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:06:13,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:06:13,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:15,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435220466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:15,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:15,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 93 [2021-07-13 20:06:15,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925125025] [2021-07-13 20:06:15,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-07-13 20:06:15,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:15,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-07-13 20:06:15,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=7268, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:06:15,444 INFO L87 Difference]: Start difference. First operand 866 states and 1867 transitions. Second operand has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:49,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:06:49,827 INFO L93 Difference]: Finished difference Result 8896 states and 17602 transitions. [2021-07-13 20:06:49,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2021-07-13 20:06:49,828 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 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 101 [2021-07-13 20:06:49,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:06:49,836 INFO L225 Difference]: With dead ends: 8896 [2021-07-13 20:06:49,836 INFO L226 Difference]: Without dead ends: 7156 [2021-07-13 20:06:49,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218377 ImplicationChecksByTransitivity, 26910.2ms TimeCoverageRelationStatistics Valid=125365, Invalid=317525, Unknown=0, NotChecked=0, Total=442890 [2021-07-13 20:06:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7156 states. [2021-07-13 20:06:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7156 to 511. [2021-07-13 20:06:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.066666666666667) internal successors, (1054), 510 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1054 transitions. [2021-07-13 20:06:49,875 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1054 transitions. Word has length 101 [2021-07-13 20:06:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:06:49,875 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1054 transitions. [2021-07-13 20:06:49,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:06:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1054 transitions. [2021-07-13 20:06:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-07-13 20:06:49,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:06:49,876 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:06:50,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:50,077 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:06:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:06:50,077 INFO L82 PathProgramCache]: Analyzing trace with hash 195179061, now seen corresponding path program 63 times [2021-07-13 20:06:50,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:06:50,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097218826] [2021-07-13 20:06:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:06:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:06:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:50,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:06:50,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097218826] [2021-07-13 20:06:50,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097218826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:50,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881906167] [2021-07-13 20:06:50,393 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:06:50,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-07-13 20:06:50,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:06:50,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:06:50,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:06:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:06:51,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881906167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:06:51,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:06:51,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47] total 71 [2021-07-13 20:06:51,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256192633] [2021-07-13 20:06:51,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-07-13 20:06:51,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:06:51,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-07-13 20:06:51,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=4144, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:06:51,913 INFO L87 Difference]: Start difference. First operand 511 states and 1054 transitions. Second operand has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:15,203 INFO L93 Difference]: Finished difference Result 6130 states and 12234 transitions. [2021-07-13 20:07:15,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 577 states. [2021-07-13 20:07:15,204 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 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 101 [2021-07-13 20:07:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:15,209 INFO L225 Difference]: With dead ends: 6130 [2021-07-13 20:07:15,209 INFO L226 Difference]: Without dead ends: 6126 [2021-07-13 20:07:15,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211754 ImplicationChecksByTransitivity, 21428.3ms TimeCoverageRelationStatistics Valid=98396, Invalid=316984, Unknown=0, NotChecked=0, Total=415380 [2021-07-13 20:07:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-07-13 20:07:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 427. [2021-07-13 20:07:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.0821596244131455) internal successors, (887), 426 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 887 transitions. [2021-07-13 20:07:15,248 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 887 transitions. Word has length 101 [2021-07-13 20:07:15,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:15,248 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 887 transitions. [2021-07-13 20:07:15,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:15,248 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 887 transitions. [2021-07-13 20:07:15,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-07-13 20:07:15,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:15,249 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:15,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:07:15,450 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:15,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:15,450 INFO L82 PathProgramCache]: Analyzing trace with hash -248290439, now seen corresponding path program 64 times [2021-07-13 20:07:15,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:15,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889096225] [2021-07-13 20:07:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:15,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:15,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889096225] [2021-07-13 20:07:15,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889096225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:15,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968866952] [2021-07-13 20:07:15,830 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:15,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:07:15,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:15,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 91 conjunts are in the unsatisfiable core [2021-07-13 20:07:15,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:15,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968866952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:15,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:15,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-07-13 20:07:15,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229282549] [2021-07-13 20:07:15,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:07:15,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:15,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:07:15,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:07:15,996 INFO L87 Difference]: Start difference. First operand 427 states and 887 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:16,574 INFO L93 Difference]: Finished difference Result 1343 states and 2650 transitions. [2021-07-13 20:07:16,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:07:16,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-07-13 20:07:16,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:16,576 INFO L225 Difference]: With dead ends: 1343 [2021-07-13 20:07:16,576 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 20:07:16,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:07:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 20:07:16,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 906. [2021-07-13 20:07:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.1591160220994476) internal successors, (1954), 905 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1954 transitions. [2021-07-13 20:07:16,585 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1954 transitions. Word has length 103 [2021-07-13 20:07:16,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:16,585 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 1954 transitions. [2021-07-13 20:07:16,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:16,585 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1954 transitions. [2021-07-13 20:07:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-07-13 20:07:16,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:16,586 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:16,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 20:07:16,787 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash 28402043, now seen corresponding path program 65 times [2021-07-13 20:07:16,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:16,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999482200] [2021-07-13 20:07:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:17,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:17,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999482200] [2021-07-13 20:07:17,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999482200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:17,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942373085] [2021-07-13 20:07:17,561 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:17,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-07-13 20:07:17,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:17,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:17,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:07:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:19,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942373085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:19,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:07:19,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2021-07-13 20:07:19,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853875639] [2021-07-13 20:07:19,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-07-13 20:07:19,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:07:19,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-07-13 20:07:19,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=7908, Unknown=0, NotChecked=0, Total=9506 [2021-07-13 20:07:19,293 INFO L87 Difference]: Start difference. First operand 906 states and 1954 transitions. Second operand has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:07:58,470 INFO L93 Difference]: Finished difference Result 9625 states and 19052 transitions. [2021-07-13 20:07:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2021-07-13 20:07:58,471 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 0 states have call successors, (0), 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 105 [2021-07-13 20:07:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:07:58,480 INFO L225 Difference]: With dead ends: 9625 [2021-07-13 20:07:58,480 INFO L226 Difference]: Without dead ends: 7735 [2021-07-13 20:07:58,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258241 ImplicationChecksByTransitivity, 29712.7ms TimeCoverageRelationStatistics Valid=146772, Invalid=369470, Unknown=0, NotChecked=0, Total=516242 [2021-07-13 20:07:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7735 states. [2021-07-13 20:07:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7735 to 533. [2021-07-13 20:07:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.0676691729323307) internal successors, (1100), 532 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1100 transitions. [2021-07-13 20:07:58,527 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1100 transitions. Word has length 105 [2021-07-13 20:07:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:07:58,527 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1100 transitions. [2021-07-13 20:07:58,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:07:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1100 transitions. [2021-07-13 20:07:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-07-13 20:07:58,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:07:58,528 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:07:58,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:07:58,734 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:07:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:07:58,735 INFO L82 PathProgramCache]: Analyzing trace with hash -972912839, now seen corresponding path program 66 times [2021-07-13 20:07:58,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:07:58,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752103030] [2021-07-13 20:07:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:07:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:07:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:07:59,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:07:59,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752103030] [2021-07-13 20:07:59,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752103030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:07:59,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812642768] [2021-07-13 20:07:59,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:07:59,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-07-13 20:07:59,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:07:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:07:59,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:01,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812642768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:01,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:01,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49] total 74 [2021-07-13 20:08:01,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823525596] [2021-07-13 20:08:01,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-07-13 20:08:01,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:01,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-07-13 20:08:01,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1046, Invalid=4504, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:08:01,080 INFO L87 Difference]: Start difference. First operand 533 states and 1100 transitions. Second operand has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:04,066 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-07-13 20:08:07,544 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-07-13 20:08:11,317 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-07-13 20:08:15,051 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-07-13 20:08:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:30,651 INFO L93 Difference]: Finished difference Result 6660 states and 13294 transitions. [2021-07-13 20:08:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 626 states. [2021-07-13 20:08:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 states have internal predecessors, (200), 0 states have call successors, (0), 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 105 [2021-07-13 20:08:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:30,660 INFO L225 Difference]: With dead ends: 6660 [2021-07-13 20:08:30,660 INFO L226 Difference]: Without dead ends: 6656 [2021-07-13 20:08:30,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250004 ImplicationChecksByTransitivity, 27161.2ms TimeCoverageRelationStatistics Valid=115046, Invalid=370066, Unknown=0, NotChecked=0, Total=485112 [2021-07-13 20:08:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2021-07-13 20:08:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 445. [2021-07-13 20:08:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.0833333333333335) internal successors, (925), 444 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:30,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 925 transitions. [2021-07-13 20:08:30,701 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 925 transitions. Word has length 105 [2021-07-13 20:08:30,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:30,701 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 925 transitions. [2021-07-13 20:08:30,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 925 transitions. [2021-07-13 20:08:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-07-13 20:08:30,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:30,702 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:30,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:30,910 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:30,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:30,910 INFO L82 PathProgramCache]: Analyzing trace with hash 601748025, now seen corresponding path program 67 times [2021-07-13 20:08:30,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:30,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48358331] [2021-07-13 20:08:30,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:31,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:31,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48358331] [2021-07-13 20:08:31,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48358331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:31,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761439714] [2021-07-13 20:08:31,414 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:31,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 95 conjunts are in the unsatisfiable core [2021-07-13 20:08:31,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:31,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761439714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:31,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:31,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-07-13 20:08:31,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194017211] [2021-07-13 20:08:31,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:08:31,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:31,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:08:31,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:08:31,597 INFO L87 Difference]: Start difference. First operand 445 states and 925 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 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) [2021-07-13 20:08:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:08:32,345 INFO L93 Difference]: Finished difference Result 1402 states and 2767 transitions. [2021-07-13 20:08:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:08:32,345 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 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) Word has length 107 [2021-07-13 20:08:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:08:32,347 INFO L225 Difference]: With dead ends: 1402 [2021-07-13 20:08:32,347 INFO L226 Difference]: Without dead ends: 1249 [2021-07-13 20:08:32,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 411.3ms TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:08:32,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-07-13 20:08:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 946. [2021-07-13 20:08:32,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.15978835978836) internal successors, (2041), 945 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:08:32,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2041 transitions. [2021-07-13 20:08:32,357 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2041 transitions. Word has length 107 [2021-07-13 20:08:32,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:08:32,357 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 2041 transitions. [2021-07-13 20:08:32,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 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) [2021-07-13 20:08:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2041 transitions. [2021-07-13 20:08:32,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-07-13 20:08:32,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:08:32,358 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:08:32,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 20:08:32,559 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:08:32,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:08:32,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1454825669, now seen corresponding path program 68 times [2021-07-13 20:08:32,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:08:32,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582294031] [2021-07-13 20:08:32,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:08:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:08:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:33,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:08:33,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582294031] [2021-07-13 20:08:33,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582294031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:33,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053873218] [2021-07-13 20:08:33,626 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:08:33,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:08:33,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:08:33,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:08:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:08:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:08:35,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053873218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:08:35,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:08:35,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 101 [2021-07-13 20:08:35,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071642671] [2021-07-13 20:08:35,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-07-13 20:08:35,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:08:35,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-07-13 20:08:35,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1727, Invalid=8575, Unknown=0, NotChecked=0, Total=10302 [2021-07-13 20:08:35,793 INFO L87 Difference]: Start difference. First operand 946 states and 2041 transitions. Second operand has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:19,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:19,631 INFO L93 Difference]: Finished difference Result 10382 states and 20558 transitions. [2021-07-13 20:09:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2021-07-13 20:09:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 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 109 [2021-07-13 20:09:19,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:19,641 INFO L225 Difference]: With dead ends: 10382 [2021-07-13 20:09:19,642 INFO L226 Difference]: Without dead ends: 8336 [2021-07-13 20:09:19,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303348 ImplicationChecksByTransitivity, 32964.5ms TimeCoverageRelationStatistics Valid=170817, Invalid=427485, Unknown=0, NotChecked=0, Total=598302 [2021-07-13 20:09:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-07-13 20:09:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 555. [2021-07-13 20:09:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.068592057761733) internal successors, (1146), 554 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:19,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1146 transitions. [2021-07-13 20:09:19,692 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1146 transitions. Word has length 109 [2021-07-13 20:09:19,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:19,692 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1146 transitions. [2021-07-13 20:09:19,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:19,692 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1146 transitions. [2021-07-13 20:09:19,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-07-13 20:09:19,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:19,693 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:19,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:19,895 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:19,895 INFO L82 PathProgramCache]: Analyzing trace with hash -561063363, now seen corresponding path program 69 times [2021-07-13 20:09:19,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:19,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107310559] [2021-07-13 20:09:19,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:20,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:20,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107310559] [2021-07-13 20:09:20,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107310559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:20,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805685279] [2021-07-13 20:09:20,471 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:20,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-07-13 20:09:20,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:20,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:09:20,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:22,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805685279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:22,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:22,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-07-13 20:09:22,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231482711] [2021-07-13 20:09:22,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-07-13 20:09:22,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:22,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-07-13 20:09:22,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:09:22,563 INFO L87 Difference]: Start difference. First operand 555 states and 1146 transitions. Second operand has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:45,172 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-07-13 20:09:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:55,071 INFO L93 Difference]: Finished difference Result 7212 states and 14398 transitions. [2021-07-13 20:09:55,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2021-07-13 20:09:55,072 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 states have internal predecessors, (208), 0 states have call successors, (0), 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 109 [2021-07-13 20:09:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:55,080 INFO L225 Difference]: With dead ends: 7212 [2021-07-13 20:09:55,080 INFO L226 Difference]: Without dead ends: 7208 [2021-07-13 20:09:55,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293220 ImplicationChecksByTransitivity, 29759.8ms TimeCoverageRelationStatistics Valid=133727, Invalid=429523, Unknown=0, NotChecked=0, Total=563250 [2021-07-13 20:09:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7208 states. [2021-07-13 20:09:55,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7208 to 463. [2021-07-13 20:09:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0844155844155843) internal successors, (963), 462 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 963 transitions. [2021-07-13 20:09:55,126 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 963 transitions. Word has length 109 [2021-07-13 20:09:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:55,126 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 963 transitions. [2021-07-13 20:09:55,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:55,127 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 963 transitions. [2021-07-13 20:09:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-07-13 20:09:55,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:55,127 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:55,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-13 20:09:55,328 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:55,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:55,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1149059065, now seen corresponding path program 70 times [2021-07-13 20:09:55,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:55,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609890871] [2021-07-13 20:09:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:55,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:55,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609890871] [2021-07-13 20:09:55,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609890871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:55,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086543640] [2021-07-13 20:09:55,690 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:55,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:09:55,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:55,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 99 conjunts are in the unsatisfiable core [2021-07-13 20:09:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:09:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:55,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086543640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:55,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:09:55,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-07-13 20:09:55,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412522878] [2021-07-13 20:09:55,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:09:55,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:09:55,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:09:55,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:09:55,879 INFO L87 Difference]: Start difference. First operand 463 states and 963 transitions. Second operand has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:09:56,606 INFO L93 Difference]: Finished difference Result 1461 states and 2884 transitions. [2021-07-13 20:09:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:09:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-07-13 20:09:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:09:56,608 INFO L225 Difference]: With dead ends: 1461 [2021-07-13 20:09:56,608 INFO L226 Difference]: Without dead ends: 1302 [2021-07-13 20:09:56,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 318.9ms TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:09:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-07-13 20:09:56,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 986. [2021-07-13 20:09:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 2.1604060913705583) internal successors, (2128), 985 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:56,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 2128 transitions. [2021-07-13 20:09:56,618 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 2128 transitions. Word has length 111 [2021-07-13 20:09:56,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:09:56,618 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 2128 transitions. [2021-07-13 20:09:56,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:09:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 2128 transitions. [2021-07-13 20:09:56,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-07-13 20:09:56,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:09:56,619 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:09:56,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:56,829 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:09:56,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:09:56,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1767498757, now seen corresponding path program 71 times [2021-07-13 20:09:56,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:09:56,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106607261] [2021-07-13 20:09:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:09:56,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:09:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:09:57,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:09:57,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106607261] [2021-07-13 20:09:57,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106607261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:09:57,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398331770] [2021-07-13 20:09:57,947 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:09:58,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-07-13 20:09:58,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:09:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:09:58,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:00,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398331770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:00,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:00,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 105 [2021-07-13 20:10:00,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902179790] [2021-07-13 20:10:00,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-07-13 20:10:00,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:00,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-07-13 20:10:00,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=9269, Unknown=0, NotChecked=0, Total=11130 [2021-07-13 20:10:00,115 INFO L87 Difference]: Start difference. First operand 986 states and 2128 transitions. Second operand has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:07,133 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:10:16,997 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-07-13 20:10:54,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:10:54,165 INFO L93 Difference]: Finished difference Result 11167 states and 22120 transitions. [2021-07-13 20:10:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2021-07-13 20:10:54,165 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 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 113 [2021-07-13 20:10:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:10:54,178 INFO L225 Difference]: With dead ends: 11167 [2021-07-13 20:10:54,178 INFO L226 Difference]: Without dead ends: 8959 [2021-07-13 20:10:54,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354141 ImplicationChecksByTransitivity, 39419.7ms TimeCoverageRelationStatistics Valid=197709, Invalid=492021, Unknown=0, NotChecked=0, Total=689730 [2021-07-13 20:10:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8959 states. [2021-07-13 20:10:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8959 to 577. [2021-07-13 20:10:54,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.0694444444444446) internal successors, (1192), 576 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1192 transitions. [2021-07-13 20:10:54,245 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1192 transitions. Word has length 113 [2021-07-13 20:10:54,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:10:54,245 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1192 transitions. [2021-07-13 20:10:54,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1192 transitions. [2021-07-13 20:10:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-07-13 20:10:54,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:10:54,246 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:10:54,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:54,461 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:10:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:10:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash -770692287, now seen corresponding path program 72 times [2021-07-13 20:10:54,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:10:54,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105736301] [2021-07-13 20:10:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:10:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:10:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:54,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:10:54,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105736301] [2021-07-13 20:10:54,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105736301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:54,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557529927] [2021-07-13 20:10:54,912 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:10:54,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-07-13 20:10:54,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:10:54,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 20:10:54,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:10:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:10:57,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557529927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:10:57,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:10:57,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53] total 80 [2021-07-13 20:10:57,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329255850] [2021-07-13 20:10:57,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-07-13 20:10:57,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:10:57,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-07-13 20:10:57,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=5269, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 20:10:57,074 INFO L87 Difference]: Start difference. First operand 577 states and 1192 transitions. Second operand has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:10:58,373 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2021-07-13 20:11:03,064 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-07-13 20:11:23,468 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-07-13 20:11:29,521 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-07-13 20:11:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:34,790 INFO L93 Difference]: Finished difference Result 7786 states and 15546 transitions. [2021-07-13 20:11:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 730 states. [2021-07-13 20:11:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 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 113 [2021-07-13 20:11:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:34,800 INFO L225 Difference]: With dead ends: 7786 [2021-07-13 20:11:34,800 INFO L226 Difference]: Without dead ends: 7782 [2021-07-13 20:11:34,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341815 ImplicationChecksByTransitivity, 34046.6ms TimeCoverageRelationStatistics Valid=154598, Invalid=495844, Unknown=0, NotChecked=0, Total=650442 [2021-07-13 20:11:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2021-07-13 20:11:34,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 481. [2021-07-13 20:11:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.0854166666666667) internal successors, (1001), 480 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1001 transitions. [2021-07-13 20:11:34,860 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1001 transitions. Word has length 113 [2021-07-13 20:11:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:34,860 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1001 transitions. [2021-07-13 20:11:34,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:34,860 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1001 transitions. [2021-07-13 20:11:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-07-13 20:11:34,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:34,861 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:35,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:35,073 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1317932217, now seen corresponding path program 73 times [2021-07-13 20:11:35,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:35,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257950854] [2021-07-13 20:11:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:35,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:35,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257950854] [2021-07-13 20:11:35,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257950854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:35,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858163161] [2021-07-13 20:11:35,529 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:35,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 103 conjunts are in the unsatisfiable core [2021-07-13 20:11:35,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:35,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858163161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:35,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:35,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-07-13 20:11:35,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905465222] [2021-07-13 20:11:35,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:11:35,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:35,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:11:35,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:11:35,734 INFO L87 Difference]: Start difference. First operand 481 states and 1001 transitions. Second operand has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:11:36,615 INFO L93 Difference]: Finished difference Result 1520 states and 3001 transitions. [2021-07-13 20:11:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:11:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-07-13 20:11:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:11:36,617 INFO L225 Difference]: With dead ends: 1520 [2021-07-13 20:11:36,617 INFO L226 Difference]: Without dead ends: 1355 [2021-07-13 20:11:36,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:11:36,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-07-13 20:11:36,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1026. [2021-07-13 20:11:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 2.1609756097560977) internal successors, (2215), 1025 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:36,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 2215 transitions. [2021-07-13 20:11:36,627 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 2215 transitions. Word has length 115 [2021-07-13 20:11:36,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:11:36,627 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 2215 transitions. [2021-07-13 20:11:36,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:36,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 2215 transitions. [2021-07-13 20:11:36,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-07-13 20:11:36,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:11:36,628 INFO L508 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:11:36,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-07-13 20:11:36,846 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:11:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:11:36,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1761941435, now seen corresponding path program 74 times [2021-07-13 20:11:36,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:11:36,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58233722] [2021-07-13 20:11:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:11:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:11:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:38,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:11:38,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58233722] [2021-07-13 20:11:38,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58233722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:38,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233912630] [2021-07-13 20:11:38,138 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:11:38,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:11:38,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:11:38,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:11:38,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:11:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:11:40,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233912630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:11:40,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:11:40,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2021-07-13 20:11:40,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202381487] [2021-07-13 20:11:40,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-07-13 20:11:40,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:11:40,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-07-13 20:11:40,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2000, Invalid=9990, Unknown=0, NotChecked=0, Total=11990 [2021-07-13 20:11:40,489 INFO L87 Difference]: Start difference. First operand 1026 states and 2215 transitions. Second operand has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:11:55,303 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:12:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:12:40,919 INFO L93 Difference]: Finished difference Result 11980 states and 23738 transitions. [2021-07-13 20:12:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 784 states. [2021-07-13 20:12:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 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 117 [2021-07-13 20:12:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:12:40,935 INFO L225 Difference]: With dead ends: 11980 [2021-07-13 20:12:40,935 INFO L226 Difference]: Without dead ends: 9604 [2021-07-13 20:12:40,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 888 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411080 ImplicationChecksByTransitivity, 42447.5ms TimeCoverageRelationStatistics Valid=227665, Invalid=563545, Unknown=0, NotChecked=0, Total=791210 [2021-07-13 20:12:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9604 states. [2021-07-13 20:12:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9604 to 599. [2021-07-13 20:12:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.0702341137123748) internal successors, (1238), 598 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1238 transitions. [2021-07-13 20:12:41,025 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1238 transitions. Word has length 117 [2021-07-13 20:12:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:12:41,025 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1238 transitions. [2021-07-13 20:12:41,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1238 transitions. [2021-07-13 20:12:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-07-13 20:12:41,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:12:41,026 INFO L508 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:12:41,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:41,241 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:12:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:12:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1295025595, now seen corresponding path program 75 times [2021-07-13 20:12:41,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:12:41,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930577193] [2021-07-13 20:12:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:12:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:12:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 651 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:41,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:12:41,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930577193] [2021-07-13 20:12:41,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930577193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789696150] [2021-07-13 20:12:41,719 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:12:41,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-07-13 20:12:41,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:12:41,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-13 20:12:41,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:12:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 651 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:12:44,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789696150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:12:44,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:12:44,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 55] total 83 [2021-07-13 20:12:44,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79688551] [2021-07-13 20:12:44,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-07-13 20:12:44,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:12:44,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-07-13 20:12:44,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=5674, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:12:44,052 INFO L87 Difference]: Start difference. First operand 599 states and 1238 transitions. Second operand has 84 states, 84 states have (on average 2.6666666666666665) internal successors, (224), 83 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:12:59,521 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 Received shutdown request... [2021-07-13 20:13:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 745 states. [2021-07-13 20:13:21,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:13:21,122 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:13:21,124 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:13:21,125 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:13:21,125 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:13:21 BasicIcfg [2021-07-13 20:13:21,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:13:21,125 INFO L168 Benchmark]: Toolchain (without parser) took 844428.46 ms. Allocated memory was 184.5 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 164.6 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 949.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:13:21,126 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 184.5 MB. Free memory is still 165.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:13:21,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.85 ms. Allocated memory is still 184.5 MB. Free memory was 164.5 MB in the beginning and 163.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:13:21,126 INFO L168 Benchmark]: Boogie Preprocessor took 11.05 ms. Allocated memory is still 184.5 MB. Free memory was 163.1 MB in the beginning and 162.1 MB in the end (delta: 990.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 20:13:21,126 INFO L168 Benchmark]: RCFGBuilder took 204.12 ms. Allocated memory is still 184.5 MB. Free memory was 162.1 MB in the beginning and 150.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:13:21,126 INFO L168 Benchmark]: TraceAbstraction took 844182.18 ms. Allocated memory was 184.5 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 149.9 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 934.4 MB. Max. memory is 8.0 GB. [2021-07-13 20:13:21,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 184.5 MB. Free memory is still 165.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.85 ms. Allocated memory is still 184.5 MB. Free memory was 164.5 MB in the beginning and 163.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.05 ms. Allocated memory is still 184.5 MB. Free memory was 163.1 MB in the beginning and 162.1 MB in the end (delta: 990.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 204.12 ms. Allocated memory is still 184.5 MB. Free memory was 162.1 MB in the beginning and 150.4 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 844182.18 ms. Allocated memory was 184.5 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 149.9 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 934.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (599states) and FLOYD_HOARE automaton (currently 745 states, 84 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 825 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 844063.3ms, OverallIterations: 78, TraceHistogramMax: 26, EmptinessCheckTime: 59.3ms, AutomataDifference: 746222.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7048 SDtfs, 43920 SDslu, 116429 SDs, 0 SdLazy, 125859 SolverSat, 7215 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64250.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22574 GetRequests, 4317 SyntacticMatches, 50 SemanticMatches, 18206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4820052 ImplicationChecksByTransitivity, 626593.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1026occurred in iteration=76, InterpolantAutomatonStates: 15058, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1173.3ms AutomataMinimizationTime, 77 MinimizatonAttempts, 159442 StatesRemovedByMinimization, 77 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 465.4ms SsaConstructionTime, 2112.2ms SatisfiabilityAnalysisTime, 75400.4ms InterpolantComputationTime, 10316 NumberOfCodeBlocks, 10316 NumberOfCodeBlocksAsserted, 734 NumberOfCheckSat, 10162 ConstructedInterpolants, 0 QuantifiedInterpolants, 84294 SizeOfPredicates, 229 NumberOfNonLiveVariables, 13184 ConjunctsInSsa, 2930 ConjunctsInUnsatCore, 154 InterpolantComputations, 2 PerfectInterpolantSequences, 22801/69003 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 could not prove your program: Timeout Completed graceful shutdown