/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/test/context1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:48:33,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:48:33,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:48:33,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:48:33,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:48:33,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:48:33,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:48:33,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:48:33,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:48:33,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:48:33,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:48:33,496 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:48:33,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:48:33,497 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:48:33,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:48:33,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:48:33,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:48:33,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:48:33,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:48:33,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:48:33,498 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:48:33,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:48:33,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:48:33,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:48:33,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:48:33,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:48:33,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:48:33,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:48:33,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:48:33,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:48:33,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:48:33,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:48:33,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:48:33,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:48:33,500 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:48:33,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:48:33,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:48:33,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:48:33,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:48:33,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:48:33,785 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:48:33,786 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:48:33,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl [2021-07-13 20:48:33,787 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl' [2021-07-13 20:48:33,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:48:33,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:48:33,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:48:33,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:48:33,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:48:33,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:48:33" (1/1) ... [2021-07-13 20:48:33,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:48:33" (1/1) ... [2021-07-13 20:48:33,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:48:33,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:48:33,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:48:33,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:48:33,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:48:33" (1/1) ... [2021-07-13 20:48:33,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:48:33" (1/1) ... [2021-07-13 20:48:33,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:48:33" (1/1) ... [2021-07-13 20:48:33,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:48:33" (1/1) ... [2021-07-13 20:48:33,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:48:33" (1/1) ... [2021-07-13 20:48:33,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:48:33" (1/1) ... [2021-07-13 20:48:33,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:48:33" (1/1) ... [2021-07-13 20:48:33,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:48:33,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:48:33,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:48:33,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:48:33,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:48:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:48:33,909 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:48:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:48:33,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:48:33,910 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:48:33,910 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:48:33,910 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:48:33,910 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:48:33,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:48:33,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:48:33,911 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:48:34,081 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:48:34,081 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 20:48:34,082 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-13 20:48:34,082 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-13 20:48:34,083 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:48:34 BoogieIcfgContainer [2021-07-13 20:48:34,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:48:34,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:48:34,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:48:34,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:48:34,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:48:33" (1/2) ... [2021-07-13 20:48:34,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eeb1c53 and model type context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:48:34, skipping insertion in model container [2021-07-13 20:48:34,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:48:34" (2/2) ... [2021-07-13 20:48:34,088 INFO L111 eAbstractionObserver]: Analyzing ICFG context1.wvr.bpl [2021-07-13 20:48:34,092 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:48:34,092 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:48:34,092 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:48:34,096 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:48:34,153 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 20:48:34,184 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 20:48:34,195 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:48:34,196 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:48:34,196 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:48:34,196 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:48:34,196 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:48:34,196 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:48:34,196 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:48:34,204 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:48:34,209 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-07-13 20:48:34,218 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-07-13 20:48:34,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:34,223 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:34,224 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1225879624, now seen corresponding path program 1 times [2021-07-13 20:48:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:34,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469435430] [2021-07-13 20:48:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:34,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:34,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469435430] [2021-07-13 20:48:34,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469435430] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:48:34,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:48:34,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:48:34,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788900501] [2021-07-13 20:48:34,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:48:34,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:34,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:48:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:48:34,366 INFO L87 Difference]: Start difference. First operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:34,385 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-07-13 20:48:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:48:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-07-13 20:48:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:34,392 INFO L225 Difference]: With dead ends: 20 [2021-07-13 20:48:34,392 INFO L226 Difference]: Without dead ends: 16 [2021-07-13 20:48:34,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:48:34,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-07-13 20:48:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-07-13 20:48:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-07-13 20:48:34,413 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-07-13 20:48:34,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:34,413 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-07-13 20:48:34,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-07-13 20:48:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-07-13 20:48:34,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:34,414 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:34,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:48:34,415 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:34,418 INFO L82 PathProgramCache]: Analyzing trace with hash 653163243, now seen corresponding path program 1 times [2021-07-13 20:48:34,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:34,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050512341] [2021-07-13 20:48:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:34,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:34,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050512341] [2021-07-13 20:48:34,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050512341] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:48:34,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:48:34,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:48:34,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692524480] [2021-07-13 20:48:34,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:48:34,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:34,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:48:34,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:48:34,460 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:34,469 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-07-13 20:48:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:48:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-07-13 20:48:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:34,471 INFO L225 Difference]: With dead ends: 21 [2021-07-13 20:48:34,471 INFO L226 Difference]: Without dead ends: 18 [2021-07-13 20:48:34,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:48:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-07-13 20:48:34,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-07-13 20:48:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-07-13 20:48:34,480 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-07-13 20:48:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:34,480 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-07-13 20:48:34,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-07-13 20:48:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 20:48:34,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:34,481 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:34,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:48:34,481 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:34,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1382019562, now seen corresponding path program 1 times [2021-07-13 20:48:34,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:34,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519085787] [2021-07-13 20:48:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:34,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:34,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519085787] [2021-07-13 20:48:34,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519085787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:34,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291625552] [2021-07-13 20:48:34,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:34,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:48:34,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:34,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:48:34,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:34,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:34,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:34,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:48:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:34,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291625552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:34,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:34,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:48:34,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769802745] [2021-07-13 20:48:34,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:48:34,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:48:34,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:48:34,701 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:34,722 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-07-13 20:48:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:48:34,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-07-13 20:48:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:34,723 INFO L225 Difference]: With dead ends: 25 [2021-07-13 20:48:34,723 INFO L226 Difference]: Without dead ends: 21 [2021-07-13 20:48:34,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:48:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-07-13 20:48:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-07-13 20:48:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 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 20:48:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-07-13 20:48:34,725 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-07-13 20:48:34,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:34,726 INFO L482 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-07-13 20:48:34,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-07-13 20:48:34,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-13 20:48:34,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:34,726 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:34,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 20:48:34,944 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:34,944 INFO L82 PathProgramCache]: Analyzing trace with hash 107792461, now seen corresponding path program 2 times [2021-07-13 20:48:34,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:34,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586305813] [2021-07-13 20:48:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:34,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:34,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586305813] [2021-07-13 20:48:34,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586305813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:34,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344819207] [2021-07-13 20:48:34,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:34,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:34,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:34,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:48:34,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:35,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344819207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:35,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:35,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 20:48:35,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136872774] [2021-07-13 20:48:35,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:48:35,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:35,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:48:35,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:48:35,017 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:35,025 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-07-13 20:48:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:48:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-13 20:48:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:35,026 INFO L225 Difference]: With dead ends: 50 [2021-07-13 20:48:35,027 INFO L226 Difference]: Without dead ends: 45 [2021-07-13 20:48:35,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:48:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-07-13 20:48:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-07-13 20:48:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-07-13 20:48:35,030 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-07-13 20:48:35,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:35,030 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-07-13 20:48:35,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-07-13 20:48:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 20:48:35,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:35,031 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:35,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:35,250 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:35,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1492763464, now seen corresponding path program 3 times [2021-07-13 20:48:35,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:35,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966601677] [2021-07-13 20:48:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:35,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:35,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966601677] [2021-07-13 20:48:35,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966601677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:35,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054626012] [2021-07-13 20:48:35,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:35,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:48:35,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:35,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 20:48:35,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:35,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:48:35,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:35,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:35,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:35,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:48:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:35,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054626012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:35,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:35,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:48:35,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709326063] [2021-07-13 20:48:35,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:48:35,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:35,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:48:35,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:48:35,442 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:35,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:35,519 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-07-13 20:48:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:48:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 20:48:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:35,520 INFO L225 Difference]: With dead ends: 65 [2021-07-13 20:48:35,520 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 20:48:35,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:48:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 20:48:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-07-13 20:48:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-07-13 20:48:35,523 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-07-13 20:48:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:35,523 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-07-13 20:48:35,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-07-13 20:48:35,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 20:48:35,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:35,523 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:35,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:35,741 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:35,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:35,741 INFO L82 PathProgramCache]: Analyzing trace with hash 969698795, now seen corresponding path program 4 times [2021-07-13 20:48:35,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:35,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360845260] [2021-07-13 20:48:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:35,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:35,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360845260] [2021-07-13 20:48:35,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360845260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:35,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043308664] [2021-07-13 20:48:35,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:35,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:35,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:35,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:48:35,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:35,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043308664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:35,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:35,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 20:48:35,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788629239] [2021-07-13 20:48:35,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:48:35,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:35,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:48:35,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:48:35,816 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:35,825 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-07-13 20:48:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:48:35,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 20:48:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:35,826 INFO L225 Difference]: With dead ends: 73 [2021-07-13 20:48:35,826 INFO L226 Difference]: Without dead ends: 66 [2021-07-13 20:48:35,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:48:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-13 20:48:35,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-07-13 20:48:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 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 20:48:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-07-13 20:48:35,830 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-07-13 20:48:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:35,830 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-07-13 20:48:35,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-07-13 20:48:35,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 20:48:35,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:35,831 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:36,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:36,050 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:36,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:36,050 INFO L82 PathProgramCache]: Analyzing trace with hash 433746838, now seen corresponding path program 5 times [2021-07-13 20:48:36,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:36,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814674534] [2021-07-13 20:48:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:36,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:36,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814674534] [2021-07-13 20:48:36,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814674534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:36,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103462012] [2021-07-13 20:48:36,106 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:36,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:48:36,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:48:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:40,421 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-07-13 20:48:40,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2021-07-13 20:48:40,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:40,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:40,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:40,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-07-13 20:48:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:40,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103462012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:40,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:40,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 20:48:40,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576727180] [2021-07-13 20:48:40,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:48:40,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:40,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:48:40,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=168, Unknown=2, NotChecked=0, Total=210 [2021-07-13 20:48:40,452 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:42,904 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2021-07-13 20:48:47,035 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 25 [2021-07-13 20:48:51,281 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 24 [2021-07-13 20:48:59,374 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2021-07-13 20:48:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:59,395 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-07-13 20:48:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:48:59,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 20:48:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:59,396 INFO L225 Difference]: With dead ends: 229 [2021-07-13 20:48:59,396 INFO L226 Difference]: Without dead ends: 116 [2021-07-13 20:48:59,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 22925.3ms TimeCoverageRelationStatistics Valid=229, Invalid=821, Unknown=6, NotChecked=0, Total=1056 [2021-07-13 20:48:59,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-13 20:48:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-07-13 20:48:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:59,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-07-13 20:48:59,402 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-07-13 20:48:59,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:59,402 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-07-13 20:48:59,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-07-13 20:48:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 20:48:59,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:59,403 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:59,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 20:48:59,617 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:59,617 INFO L82 PathProgramCache]: Analyzing trace with hash 908220856, now seen corresponding path program 6 times [2021-07-13 20:48:59,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:59,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532844706] [2021-07-13 20:48:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:59,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:59,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532844706] [2021-07-13 20:48:59,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532844706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:59,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876102933] [2021-07-13 20:48:59,721 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:59,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:48:59,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:59,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:48:59,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:59,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:48:59,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:59,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:59,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:59,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:48:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:59,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876102933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:59,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:59,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 20:48:59,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166191596] [2021-07-13 20:48:59,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:48:59,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:59,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:48:59,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:48:59,860 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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 20:49:00,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:00,000 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-07-13 20:49:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:49:00,000 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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 20:49:00,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:00,001 INFO L225 Difference]: With dead ends: 121 [2021-07-13 20:49:00,001 INFO L226 Difference]: Without dead ends: 77 [2021-07-13 20:49:00,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:49:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-13 20:49:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-07-13 20:49:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-07-13 20:49:00,004 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-07-13 20:49:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:00,004 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-07-13 20:49:00,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 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 20:49:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-07-13 20:49:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:49:00,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:00,005 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:00,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:00,222 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:00,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1909198613, now seen corresponding path program 7 times [2021-07-13 20:49:00,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:00,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666046713] [2021-07-13 20:49:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:00,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:00,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666046713] [2021-07-13 20:49:00,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666046713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:00,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236925727] [2021-07-13 20:49:00,269 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:00,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 20:49:00,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:00,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236925727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:00,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:00,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 20:49:00,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861467976] [2021-07-13 20:49:00,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:49:00,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:00,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:49:00,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:00,379 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:00,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:00,395 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-07-13 20:49:00,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:49:00,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 20:49:00,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:00,397 INFO L225 Difference]: With dead ends: 128 [2021-07-13 20:49:00,397 INFO L226 Difference]: Without dead ends: 117 [2021-07-13 20:49:00,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:49:00,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-13 20:49:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-07-13 20:49:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-07-13 20:49:00,403 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-07-13 20:49:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:00,403 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-07-13 20:49:00,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-07-13 20:49:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:49:00,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:00,405 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:00,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:00,628 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash 119613718, now seen corresponding path program 8 times [2021-07-13 20:49:00,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:00,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742144467] [2021-07-13 20:49:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:00,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:00,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742144467] [2021-07-13 20:49:00,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742144467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:00,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434174768] [2021-07-13 20:49:00,727 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:00,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:00,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:00,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:49:00,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:00,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:49:00,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:00,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:00,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:00,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:49:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:00,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434174768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:00,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:00,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 20:49:00,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802919630] [2021-07-13 20:49:00,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:00,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:00,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:00,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:00,804 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:00,974 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-07-13 20:49:00,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:49:00,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 20:49:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:00,975 INFO L225 Difference]: With dead ends: 179 [2021-07-13 20:49:00,975 INFO L226 Difference]: Without dead ends: 105 [2021-07-13 20:49:00,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:49:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-07-13 20:49:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-07-13 20:49:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 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 20:49:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-07-13 20:49:00,978 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-07-13 20:49:00,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:00,978 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-07-13 20:49:00,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:00,979 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-07-13 20:49:00,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:49:00,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:00,979 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:01,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:49:01,189 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:01,190 INFO L82 PathProgramCache]: Analyzing trace with hash -586216115, now seen corresponding path program 9 times [2021-07-13 20:49:01,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:01,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543310779] [2021-07-13 20:49:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:01,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:01,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543310779] [2021-07-13 20:49:01,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543310779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:01,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345654908] [2021-07-13 20:49:01,234 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:01,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:49:01,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:01,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:49:01,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:01,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345654908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:01,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:01,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 20:49:01,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740180829] [2021-07-13 20:49:01,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:49:01,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:01,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:49:01,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:49:01,308 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:01,322 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-07-13 20:49:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:49:01,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:49:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:01,323 INFO L225 Difference]: With dead ends: 160 [2021-07-13 20:49:01,323 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 20:49:01,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:49:01,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 20:49:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-07-13 20:49:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:01,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-07-13 20:49:01,327 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-07-13 20:49:01,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:01,327 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-07-13 20:49:01,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:01,327 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-07-13 20:49:01,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:49:01,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:01,328 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:01,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:01,544 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:01,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:01,544 INFO L82 PathProgramCache]: Analyzing trace with hash -812718408, now seen corresponding path program 10 times [2021-07-13 20:49:01,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:01,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30462430] [2021-07-13 20:49:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:01,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:01,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30462430] [2021-07-13 20:49:01,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30462430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:01,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662711102] [2021-07-13 20:49:01,671 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:01,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:01,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:49:01,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:01,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:49:01,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:01,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:01,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:01,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:49:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:01,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662711102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:01,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:01,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 20:49:01,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472061478] [2021-07-13 20:49:01,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:49:01,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:01,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:49:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:49:01,763 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:02,014 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-07-13 20:49:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:49:02,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:49:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:02,014 INFO L225 Difference]: With dead ends: 229 [2021-07-13 20:49:02,015 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 20:49:02,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:49:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 20:49:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-07-13 20:49:02,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-07-13 20:49:02,017 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-07-13 20:49:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:02,017 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-07-13 20:49:02,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-07-13 20:49:02,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:49:02,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:02,018 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:02,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:02,236 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:02,237 INFO L82 PathProgramCache]: Analyzing trace with hash 576259051, now seen corresponding path program 11 times [2021-07-13 20:49:02,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:02,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25145634] [2021-07-13 20:49:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:02,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:02,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25145634] [2021-07-13 20:49:02,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25145634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:02,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545812040] [2021-07-13 20:49:02,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:02,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:49:02,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:49:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:02,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545812040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:02,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:02,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 20:49:02,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671423158] [2021-07-13 20:49:02,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:49:02,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:02,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:49:02,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:02,380 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:02,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:02,397 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-07-13 20:49:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:49:02,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:49:02,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:02,398 INFO L225 Difference]: With dead ends: 195 [2021-07-13 20:49:02,398 INFO L226 Difference]: Without dead ends: 180 [2021-07-13 20:49:02,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:49:02,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-07-13 20:49:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-07-13 20:49:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-07-13 20:49:02,401 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-07-13 20:49:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:02,402 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-07-13 20:49:02,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:02,402 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-07-13 20:49:02,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 20:49:02,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:02,402 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:02,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 20:49:02,617 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:02,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:02,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1950887574, now seen corresponding path program 12 times [2021-07-13 20:49:02,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:02,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992445573] [2021-07-13 20:49:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:02,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:02,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992445573] [2021-07-13 20:49:02,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992445573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:02,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295003712] [2021-07-13 20:49:02,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:02,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:49:02,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:02,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:49:02,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:02,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:49:02,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:02,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:02,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:02,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:49:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:02,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295003712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:02,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:02,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-13 20:49:02,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410492087] [2021-07-13 20:49:02,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:02,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:02,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:02,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:02,904 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:03,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:03,227 INFO L93 Difference]: Finished difference Result 285 states and 545 transitions. [2021-07-13 20:49:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:49:03,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 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 20:49:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:03,229 INFO L225 Difference]: With dead ends: 285 [2021-07-13 20:49:03,229 INFO L226 Difference]: Without dead ends: 169 [2021-07-13 20:49:03,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:49:03,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-13 20:49:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 51. [2021-07-13 20:49:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.92) internal successors, (96), 50 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 20:49:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 96 transitions. [2021-07-13 20:49:03,231 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 96 transitions. Word has length 23 [2021-07-13 20:49:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:03,231 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 96 transitions. [2021-07-13 20:49:03,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 96 transitions. [2021-07-13 20:49:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:49:03,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:03,232 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:03,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:49:03,435 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:03,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:03,435 INFO L82 PathProgramCache]: Analyzing trace with hash 348698573, now seen corresponding path program 13 times [2021-07-13 20:49:03,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:03,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18410431] [2021-07-13 20:49:03,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:03,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:03,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18410431] [2021-07-13 20:49:03,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18410431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:03,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973544031] [2021-07-13 20:49:03,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:03,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:49:03,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:03,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973544031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:03,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:03,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 20:49:03,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275218207] [2021-07-13 20:49:03,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:49:03,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:03,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:49:03,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:49:03,580 INFO L87 Difference]: Start difference. First operand 51 states and 96 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:03,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:03,613 INFO L93 Difference]: Finished difference Result 233 states and 430 transitions. [2021-07-13 20:49:03,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:49:03,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:49:03,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:03,614 INFO L225 Difference]: With dead ends: 233 [2021-07-13 20:49:03,614 INFO L226 Difference]: Without dead ends: 216 [2021-07-13 20:49:03,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:49:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-13 20:49:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 168. [2021-07-13 20:49:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.095808383233533) internal successors, (350), 167 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 350 transitions. [2021-07-13 20:49:03,618 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 350 transitions. Word has length 24 [2021-07-13 20:49:03,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:03,618 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 350 transitions. [2021-07-13 20:49:03,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:03,618 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 350 transitions. [2021-07-13 20:49:03,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 20:49:03,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:03,619 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:03,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:49:03,827 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:03,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1483217992, now seen corresponding path program 14 times [2021-07-13 20:49:03,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:03,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346993219] [2021-07-13 20:49:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:04,051 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 20:49:04,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:04,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346993219] [2021-07-13 20:49:04,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346993219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:04,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081874426] [2021-07-13 20:49:04,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:04,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:04,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:04,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:49:04,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:04,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:49:04,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:04,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:04,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:04,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:49:04,177 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 20:49:04,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081874426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:04,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:04,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-07-13 20:49:04,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415713933] [2021-07-13 20:49:04,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:49:04,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:04,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:49:04,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:49:04,179 INFO L87 Difference]: Start difference. First operand 168 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:04,618 INFO L93 Difference]: Finished difference Result 347 states and 667 transitions. [2021-07-13 20:49:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:49:04,618 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 20:49:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:04,619 INFO L225 Difference]: With dead ends: 347 [2021-07-13 20:49:04,619 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 20:49:04,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 481.6ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:49:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 20:49:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 56. [2021-07-13 20:49:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-07-13 20:49:04,622 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-07-13 20:49:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:04,622 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-07-13 20:49:04,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-07-13 20:49:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:49:04,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:04,622 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:04,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:04,841 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:04,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1265608427, now seen corresponding path program 15 times [2021-07-13 20:49:04,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:04,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080818174] [2021-07-13 20:49:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:04,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:04,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080818174] [2021-07-13 20:49:04,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080818174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:04,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085323050] [2021-07-13 20:49:04,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:04,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:49:04,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:04,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 20:49:04,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:05,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085323050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:05,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:05,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 20:49:05,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785633885] [2021-07-13 20:49:05,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:49:05,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:05,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:49:05,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:05,004 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:05,028 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-07-13 20:49:05,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:49:05,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-07-13 20:49:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:05,029 INFO L225 Difference]: With dead ends: 274 [2021-07-13 20:49:05,029 INFO L226 Difference]: Without dead ends: 255 [2021-07-13 20:49:05,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-07-13 20:49:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-07-13 20:49:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-07-13 20:49:05,033 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-07-13 20:49:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:05,034 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-07-13 20:49:05,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:05,034 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-07-13 20:49:05,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:49:05,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:05,034 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:05,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:49:05,244 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:05,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1730380822, now seen corresponding path program 16 times [2021-07-13 20:49:05,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:05,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588193417] [2021-07-13 20:49:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:05,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:05,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588193417] [2021-07-13 20:49:05,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588193417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:05,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920379086] [2021-07-13 20:49:05,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:05,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:05,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:49:05,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:05,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:49:05,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:05,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:05,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:05,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-13 20:49:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:05,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920379086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:05,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:05,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-07-13 20:49:05,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862943726] [2021-07-13 20:49:05,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:49:05,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:05,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:49:05,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:49:05,655 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:06,194 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-07-13 20:49:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:49:06,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:49:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:06,195 INFO L225 Difference]: With dead ends: 415 [2021-07-13 20:49:06,195 INFO L226 Difference]: Without dead ends: 249 [2021-07-13 20:49:06,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 609.6ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:49:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-07-13 20:49:06,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-07-13 20:49:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 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 20:49:06,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-07-13 20:49:06,198 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-07-13 20:49:06,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:06,198 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-07-13 20:49:06,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:06,198 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-07-13 20:49:06,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:06,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:06,198 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:06,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:49:06,399 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:06,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:06,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2102923853, now seen corresponding path program 17 times [2021-07-13 20:49:06,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:06,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883153952] [2021-07-13 20:49:06,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:06,466 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:06,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:06,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883153952] [2021-07-13 20:49:06,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883153952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:06,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613012120] [2021-07-13 20:49:06,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:06,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 20:49:06,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:06,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 20:49:06,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:06,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613012120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:06,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:06,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 20:49:06,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955303555] [2021-07-13 20:49:06,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:49:06,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:06,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:49:06,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:49:06,566 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:06,589 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-07-13 20:49:06,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:49:06,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 28 [2021-07-13 20:49:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:06,590 INFO L225 Difference]: With dead ends: 318 [2021-07-13 20:49:06,590 INFO L226 Difference]: Without dead ends: 297 [2021-07-13 20:49:06,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:49:06,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-07-13 20:49:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-07-13 20:49:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-07-13 20:49:06,595 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-07-13 20:49:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:06,595 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-07-13 20:49:06,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-07-13 20:49:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:49:06,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:06,596 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:06,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:06,800 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:06,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:06,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2072596664, now seen corresponding path program 18 times [2021-07-13 20:49:06,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:06,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375999373] [2021-07-13 20:49:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:07,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:07,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375999373] [2021-07-13 20:49:07,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375999373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:07,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160511198] [2021-07-13 20:49:07,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:07,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:49:07,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:07,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:49:07,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:44,645 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-07-13 20:49:44,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2021-07-13 20:49:44,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:44,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:44,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:44,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-07-13 20:49:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 7 proven. 65 refuted. 38 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:44,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160511198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:44,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:44,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-07-13 20:49:44,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451706669] [2021-07-13 20:49:44,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-13 20:49:44,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:44,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-13 20:49:44,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1531, Unknown=40, NotChecked=0, Total=1806 [2021-07-13 20:49:44,658 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 43 states, 43 states have (on average 1.255813953488372) internal successors, (54), 42 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:47,934 WARN L205 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-07-13 20:49:50,797 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2021-07-13 20:49:51,255 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-13 20:49:52,768 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-07-13 20:49:53,275 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2021-07-13 20:49:54,468 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-07-13 20:49:55,450 WARN L205 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:49:57,166 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-07-13 20:49:58,117 WARN L205 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-07-13 20:50:05,311 WARN L205 SmtUtils]: Spent 7.13 s on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-07-13 20:50:06,942 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-07-13 20:50:09,789 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-13 20:50:19,320 WARN L205 SmtUtils]: Spent 7.46 s on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-13 20:50:20,270 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2021-07-13 20:50:29,618 WARN L205 SmtUtils]: Spent 9.30 s on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2021-07-13 20:50:41,268 WARN L205 SmtUtils]: Spent 5.77 s on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-07-13 20:50:45,957 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-07-13 20:50:52,065 WARN L205 SmtUtils]: Spent 3.66 s on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-07-13 20:50:55,507 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-07-13 20:51:00,297 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-07-13 20:51:07,771 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 50 [2021-07-13 20:51:15,445 WARN L205 SmtUtils]: Spent 3.56 s on a formula simplification that was a NOOP. DAG size: 58 [2021-07-13 20:51:25,311 WARN L205 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-07-13 20:51:34,393 WARN L205 SmtUtils]: Spent 8.03 s on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-07-13 20:51:57,003 WARN L205 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-07-13 20:52:13,194 WARN L205 SmtUtils]: Spent 5.49 s on a formula simplification that was a NOOP. DAG size: 49 [2021-07-13 20:52:31,124 WARN L205 SmtUtils]: Spent 3.98 s on a formula simplification that was a NOOP. DAG size: 56 [2021-07-13 20:52:47,036 WARN L205 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-07-13 20:52:57,289 WARN L205 SmtUtils]: Spent 3.17 s on a formula simplification that was a NOOP. DAG size: 54 [2021-07-13 20:53:20,608 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-07-13 20:53:26,158 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-07-13 20:53:42,762 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 20:53:55,903 WARN L205 SmtUtils]: Spent 3.34 s on a formula simplification that was a NOOP. DAG size: 47 [2021-07-13 20:54:07,497 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-07-13 20:54:30,352 WARN L205 SmtUtils]: Spent 4.97 s on a formula simplification that was a NOOP. DAG size: 54 [2021-07-13 20:54:40,308 WARN L205 SmtUtils]: Spent 8.44 s on a formula simplification that was a NOOP. DAG size: 61 [2021-07-13 20:55:21,731 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-07-13 20:55:33,740 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-13 20:55:46,465 WARN L205 SmtUtils]: Spent 4.89 s on a formula simplification that was a NOOP. DAG size: 46 [2021-07-13 20:56:15,361 WARN L205 SmtUtils]: Spent 6.97 s on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-07-13 20:56:37,029 WARN L205 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-07-13 20:57:10,194 WARN L205 SmtUtils]: Spent 17.53 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-07-13 20:57:31,349 WARN L205 SmtUtils]: Spent 7.40 s on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-07-13 20:58:06,258 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-13 20:58:18,089 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-13 20:58:39,452 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-07-13 20:59:03,309 WARN L205 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-07-13 20:59:25,481 WARN L205 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 44 [2021-07-13 20:59:36,333 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-07-13 21:00:04,889 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-07-13 21:00:35,529 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 46 [2021-07-13 21:01:09,018 WARN L205 SmtUtils]: Spent 3.32 s on a formula simplification that was a NOOP. DAG size: 53 [2021-07-13 21:01:37,197 WARN L205 SmtUtils]: Spent 6.47 s on a formula simplification that was a NOOP. DAG size: 52 [2021-07-13 21:03:03,520 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 28 Received shutdown request... [2021-07-13 21:03:28,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-13 21:03:29,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 21:03:29,148 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 21:03:29,149 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 21:03:29,150 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 21:03:29,151 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 09:03:29 BasicIcfg [2021-07-13 21:03:29,151 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 21:03:29,151 INFO L168 Benchmark]: Toolchain (without parser) took 895331.13 ms. Allocated memory was 172.0 MB in the beginning and 222.3 MB in the end (delta: 50.3 MB). Free memory was 150.9 MB in the beginning and 194.4 MB in the end (delta: -43.5 MB). Peak memory consumption was 128.3 MB. Max. memory is 8.0 GB. [2021-07-13 21:03:29,151 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 172.0 MB. Free memory is still 152.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 21:03:29,151 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.42 ms. Allocated memory is still 172.0 MB. Free memory was 150.7 MB in the beginning and 149.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 21:03:29,151 INFO L168 Benchmark]: Boogie Preprocessor took 11.56 ms. Allocated memory is still 172.0 MB. Free memory was 149.3 MB in the beginning and 148.5 MB in the end (delta: 826.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 21:03:29,151 INFO L168 Benchmark]: RCFGBuilder took 229.56 ms. Allocated memory is still 172.0 MB. Free memory was 148.2 MB in the beginning and 136.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-13 21:03:29,151 INFO L168 Benchmark]: TraceAbstraction took 895066.12 ms. Allocated memory was 172.0 MB in the beginning and 222.3 MB in the end (delta: 50.3 MB). Free memory was 136.5 MB in the beginning and 194.4 MB in the end (delta: -57.9 MB). Peak memory consumption was 113.6 MB. Max. memory is 8.0 GB. [2021-07-13 21:03:29,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 172.0 MB. Free memory is still 152.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.42 ms. Allocated memory is still 172.0 MB. Free memory was 150.7 MB in the beginning and 149.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.56 ms. Allocated memory is still 172.0 MB. Free memory was 149.3 MB in the beginning and 148.5 MB in the end (delta: 826.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 229.56 ms. Allocated memory is still 172.0 MB. Free memory was 148.2 MB in the beginning and 136.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 895066.12 ms. Allocated memory was 172.0 MB in the beginning and 222.3 MB in the end (delta: 50.3 MB). Free memory was 136.5 MB in the beginning and 194.4 MB in the end (delta: -57.9 MB). Peak memory consumption was 113.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (237states) and FLOYD_HOARE automaton (currently 106 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 146 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 894954.1ms, OverallIterations: 20, TraceHistogramMax: 10, EmptinessCheckTime: 13.5ms, AutomataDifference: 845424.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 657 SDtfs, 2964 SDslu, 5092 SDs, 0 SdLazy, 1536 SolverSat, 856 SolverUnsat, 61 SolverUnknown, 0 SolverNotchecked, 34832.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 791 GetRequests, 368 SyntacticMatches, 19 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7337 ImplicationChecksByTransitivity, 828380.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=237occurred in iteration=19, InterpolantAutomatonStates: 202, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 74.9ms AutomataMinimizationTime, 19 MinimizatonAttempts, 1024 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 92.3ms SsaConstructionTime, 382.1ms SatisfiabilityAnalysisTime, 44536.9ms InterpolantComputationTime, 747 NumberOfCodeBlocks, 747 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 709 ConstructedInterpolants, 19 QuantifiedInterpolants, 3222 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1519 ConjunctsInSsa, 352 ConjunctsInUnsatCore, 38 InterpolantComputations, 2 PerfectInterpolantSequences, 427/1617 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