/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 19:50:50,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 19:50:50,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 19:50:50,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 19:50:50,533 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 [2021-05-21 19:50:50,562 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 19:50:50,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 19:50:50,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 19:50:50,563 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 19:50:50,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 19:50:50,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 19:50:50,564 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 19:50:50,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 19:50:50,564 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 19:50:50,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 19:50:50,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 19:50:50,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 19:50:50,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 19:50:50,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 19:50:50,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 19:50:50,565 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 19:50:50,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 19:50:50,565 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 19:50:50,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 19:50:50,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 19:50:50,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 19:50:50,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 19:50:50,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 19:50:50,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 19:50:50,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 19:50:50,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 19:50:50,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 19:50:50,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 19:50:50,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 19:50:50,567 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 19:50:50,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 19:50:50,567 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 19:50:50,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 19:50:50,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 19:50:50,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 19:50:50,772 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 19:50:50,773 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 19:50:50,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl [2021-05-21 19:50:50,773 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl' [2021-05-21 19:50:50,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 19:50:50,800 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 19:50:50,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 19:50:50,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 19:50:50,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 19:50:50,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:50:50" (1/1) ... [2021-05-21 19:50:50,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:50:50" (1/1) ... [2021-05-21 19:50:50,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 19:50:50,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 19:50:50,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 19:50:50,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 19:50:50,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:50:50" (1/1) ... [2021-05-21 19:50:50,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:50:50" (1/1) ... [2021-05-21 19:50:50,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:50:50" (1/1) ... [2021-05-21 19:50:50,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:50:50" (1/1) ... [2021-05-21 19:50:50,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:50:50" (1/1) ... [2021-05-21 19:50:50,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:50:50" (1/1) ... [2021-05-21 19:50:50,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:50:50" (1/1) ... [2021-05-21 19:50:50,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 19:50:50,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 19:50:50,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 19:50:50,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 19:50:50,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:50:50" (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 [2021-05-21 19:50:50,884 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 19:50:50,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 19:50:50,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 19:50:50,884 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T1 given in one single declaration [2021-05-21 19:50:50,884 INFO L130 BoogieDeclarations]: Found specification of procedure T1 [2021-05-21 19:50:50,884 INFO L138 BoogieDeclarations]: Found implementation of procedure T1 [2021-05-21 19:50:50,884 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T2 given in one single declaration [2021-05-21 19:50:50,884 INFO L130 BoogieDeclarations]: Found specification of procedure T2 [2021-05-21 19:50:50,885 INFO L138 BoogieDeclarations]: Found implementation of procedure T2 [2021-05-21 19:50:50,885 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 19:50:51,027 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 19:50:51,027 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 19:50:51,028 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 07:50:51 BoogieIcfgContainer [2021-05-21 19:50:51,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 19:50:51,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 19:50:51,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 19:50:51,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 19:50:51,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 07:50:50" (1/2) ... [2021-05-21 19:50:51,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2846017d and model type MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 07:50:51, skipping insertion in model container [2021-05-21 19:50:51,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 07:50:51" (2/2) ... [2021-05-21 19:50:51,033 INFO L111 eAbstractionObserver]: Analyzing ICFG MirabelleConcurrentIncrement.bpl [2021-05-21 19:50:51,037 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 19:50:51,037 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 19:50:51,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 19:50:51,037 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 19:50:51,060 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-21 19:50:51,074 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 19:50:51,087 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 19:50:51,087 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 19:50:51,087 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 19:50:51,087 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 19:50:51,087 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 19:50:51,087 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 19:50:51,088 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 19:50:51,088 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 19:50:51,094 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 62 flow [2021-05-21 19:50:51,103 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.96875) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.96875) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-21 19:50:51,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:51,110 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:51,110 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1474916704, now seen corresponding path program 1 times [2021-05-21 19:50:51,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:51,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200258980] [2021-05-21 19:50:51,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:51,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:51,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200258980] [2021-05-21 19:50:51,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200258980] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:50:51,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:50:51,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-05-21 19:50:51,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059870899] [2021-05-21 19:50:51,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 19:50:51,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:51,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 19:50:51,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 19:50:51,240 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.96875) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 5.0) 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) [2021-05-21 19:50:51,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:51,305 INFO L93 Difference]: Finished difference Result 63 states and 122 transitions. [2021-05-21 19:50:51,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 19:50:51,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) 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 [2021-05-21 19:50:51,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:51,316 INFO L225 Difference]: With dead ends: 63 [2021-05-21 19:50:51,317 INFO L226 Difference]: Without dead ends: 52 [2021-05-21 19:50:51,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 19:50:51,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-21 19:50:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-21 19:50:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-05-21 19:50:51,351 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 10 [2021-05-21 19:50:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:51,352 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-05-21 19:50:51,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.0) 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) [2021-05-21 19:50:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-05-21 19:50:51,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-21 19:50:51,353 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:51,353 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:51,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 19:50:51,353 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:51,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2103181474, now seen corresponding path program 1 times [2021-05-21 19:50:51,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:51,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475186252] [2021-05-21 19:50:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:51,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:51,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475186252] [2021-05-21 19:50:51,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475186252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:51,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898650695] [2021-05-21 19:50:51,429 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 [2021-05-21 19:50:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:51,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-21 19:50:51,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:51,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898650695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:51,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:51,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-21 19:50:51,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75526313] [2021-05-21 19:50:51,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:50:51,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:51,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:50:51,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:50:51,517 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:51,559 INFO L93 Difference]: Finished difference Result 78 states and 145 transitions. [2021-05-21 19:50:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 19:50:51,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-21 19:50:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:51,560 INFO L225 Difference]: With dead ends: 78 [2021-05-21 19:50:51,560 INFO L226 Difference]: Without dead ends: 78 [2021-05-21 19:50:51,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:50:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-21 19:50:51,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2021-05-21 19:50:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:51,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-05-21 19:50:51,566 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2021-05-21 19:50:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:51,566 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-05-21 19:50:51,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-05-21 19:50:51,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-21 19:50:51,566 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:51,567 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:51,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-21 19:50:51,777 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:51,777 INFO L82 PathProgramCache]: Analyzing trace with hash -85551518, now seen corresponding path program 1 times [2021-05-21 19:50:51,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:51,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387356582] [2021-05-21 19:50:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:51,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:51,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387356582] [2021-05-21 19:50:51,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387356582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:50:51,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:50:51,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 19:50:51,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943079594] [2021-05-21 19:50:51,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 19:50:51,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:51,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 19:50:51,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:50:51,806 INFO L87 Difference]: Start difference. First operand 43 states and 85 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) [2021-05-21 19:50:51,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:51,822 INFO L93 Difference]: Finished difference Result 51 states and 93 transitions. [2021-05-21 19:50:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 19:50:51,822 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 [2021-05-21 19:50:51,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:51,823 INFO L225 Difference]: With dead ends: 51 [2021-05-21 19:50:51,823 INFO L226 Difference]: Without dead ends: 43 [2021-05-21 19:50:51,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:50:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-21 19:50:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-21 19:50:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-05-21 19:50:51,827 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 12 [2021-05-21 19:50:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:51,827 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-05-21 19:50:51,827 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) [2021-05-21 19:50:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-05-21 19:50:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-21 19:50:51,827 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:51,827 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:51,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 19:50:51,828 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:51,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:51,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1933209310, now seen corresponding path program 2 times [2021-05-21 19:50:51,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:51,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165693780] [2021-05-21 19:50:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:51,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:51,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165693780] [2021-05-21 19:50:51,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165693780] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:50:51,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:50:51,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 19:50:51,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766371528] [2021-05-21 19:50:51,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 19:50:51,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:51,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 19:50:51,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 19:50:51,854 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2021-05-21 19:50:51,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:51,874 INFO L93 Difference]: Finished difference Result 48 states and 93 transitions. [2021-05-21 19:50:51,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 19:50:51,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 [2021-05-21 19:50:51,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:51,875 INFO L225 Difference]: With dead ends: 48 [2021-05-21 19:50:51,875 INFO L226 Difference]: Without dead ends: 48 [2021-05-21 19:50:51,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 19:50:51,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-21 19:50:51,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-05-21 19:50:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 85 transitions. [2021-05-21 19:50:51,878 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 85 transitions. Word has length 12 [2021-05-21 19:50:51,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:51,879 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 85 transitions. [2021-05-21 19:50:51,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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) [2021-05-21 19:50:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 85 transitions. [2021-05-21 19:50:51,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 19:50:51,879 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:51,879 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:51,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 19:50:51,879 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:51,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:51,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1742393248, now seen corresponding path program 1 times [2021-05-21 19:50:51,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:51,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197635950] [2021-05-21 19:50:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:51,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:51,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197635950] [2021-05-21 19:50:51,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197635950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:51,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677277851] [2021-05-21 19:50:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:51,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:50:51,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:52,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677277851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:52,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:52,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-05-21 19:50:52,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503703177] [2021-05-21 19:50:52,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 19:50:52,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:52,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 19:50:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:50:52,034 INFO L87 Difference]: Start difference. First operand 44 states and 85 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-05-21 19:50:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:52,064 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2021-05-21 19:50:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 19:50:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 [2021-05-21 19:50:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:52,066 INFO L225 Difference]: With dead ends: 107 [2021-05-21 19:50:52,066 INFO L226 Difference]: Without dead ends: 98 [2021-05-21 19:50:52,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:50:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-21 19:50:52,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2021-05-21 19:50:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 146 transitions. [2021-05-21 19:50:52,082 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 146 transitions. Word has length 14 [2021-05-21 19:50:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:52,082 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 146 transitions. [2021-05-21 19:50:52,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-05-21 19:50:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 146 transitions. [2021-05-21 19:50:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 19:50:52,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:52,084 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:52,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:52,289 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:52,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:52,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1371911392, now seen corresponding path program 2 times [2021-05-21 19:50:52,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:52,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320217021] [2021-05-21 19:50:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 19:50:52,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:52,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320217021] [2021-05-21 19:50:52,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320217021] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:50:52,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 19:50:52,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-21 19:50:52,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382812859] [2021-05-21 19:50:52,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 19:50:52,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:52,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 19:50:52,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:50:52,348 INFO L87 Difference]: Start difference. First operand 70 states and 146 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-05-21 19:50:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:52,382 INFO L93 Difference]: Finished difference Result 127 states and 259 transitions. [2021-05-21 19:50:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 19:50:52,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 [2021-05-21 19:50:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:52,383 INFO L225 Difference]: With dead ends: 127 [2021-05-21 19:50:52,383 INFO L226 Difference]: Without dead ends: 118 [2021-05-21 19:50:52,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 19:50:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-21 19:50:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2021-05-21 19:50:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.191011235955056) internal successors, (195), 89 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2021-05-21 19:50:52,392 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 14 [2021-05-21 19:50:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:52,392 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2021-05-21 19:50:52,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-05-21 19:50:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2021-05-21 19:50:52,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 19:50:52,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:52,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:52,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 19:50:52,393 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:52,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:52,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1755689310, now seen corresponding path program 3 times [2021-05-21 19:50:52,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:52,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064646290] [2021-05-21 19:50:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:52,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:52,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064646290] [2021-05-21 19:50:52,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064646290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:52,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321040907] [2021-05-21 19:50:52,423 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 [2021-05-21 19:50:52,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 19:50:52,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:52,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 19:50:52,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:52,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321040907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:52,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:52,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 19:50:52,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863023145] [2021-05-21 19:50:52,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:50:52,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:52,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:50:52,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:50:52,499 INFO L87 Difference]: Start difference. First operand 90 states and 195 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:52,626 INFO L93 Difference]: Finished difference Result 176 states and 345 transitions. [2021-05-21 19:50:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 19:50:52,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 19:50:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:52,633 INFO L225 Difference]: With dead ends: 176 [2021-05-21 19:50:52,633 INFO L226 Difference]: Without dead ends: 176 [2021-05-21 19:50:52,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 19:50:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-21 19:50:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 92. [2021-05-21 19:50:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.208791208791209) internal successors, (201), 91 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 201 transitions. [2021-05-21 19:50:52,652 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 201 transitions. Word has length 16 [2021-05-21 19:50:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:52,652 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 201 transitions. [2021-05-21 19:50:52,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 201 transitions. [2021-05-21 19:50:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 19:50:52,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:52,652 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:52,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:52,853 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:52,854 INFO L82 PathProgramCache]: Analyzing trace with hash -627140766, now seen corresponding path program 4 times [2021-05-21 19:50:52,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:52,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518284186] [2021-05-21 19:50:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:52,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:52,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518284186] [2021-05-21 19:50:52,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518284186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:52,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706762418] [2021-05-21 19:50:52,890 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 [2021-05-21 19:50:52,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 19:50:52,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:52,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 19:50:52,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:52,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706762418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:52,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:52,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 19:50:52,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616712898] [2021-05-21 19:50:52,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:50:52,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:52,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:50:52,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:50:52,952 INFO L87 Difference]: Start difference. First operand 92 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:53,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:53,017 INFO L93 Difference]: Finished difference Result 161 states and 325 transitions. [2021-05-21 19:50:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 19:50:53,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-21 19:50:53,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:53,018 INFO L225 Difference]: With dead ends: 161 [2021-05-21 19:50:53,018 INFO L226 Difference]: Without dead ends: 150 [2021-05-21 19:50:53,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 19:50:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-21 19:50:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2021-05-21 19:50:53,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1981981981981984) internal successors, (244), 111 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2021-05-21 19:50:53,022 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 16 [2021-05-21 19:50:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:53,022 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2021-05-21 19:50:53,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:53,022 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2021-05-21 19:50:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 19:50:53,022 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:53,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:53,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:53,237 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:53,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2026275120, now seen corresponding path program 5 times [2021-05-21 19:50:53,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:53,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063410051] [2021-05-21 19:50:53,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:53,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:53,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063410051] [2021-05-21 19:50:53,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063410051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:53,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368852698] [2021-05-21 19:50:53,265 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 [2021-05-21 19:50:53,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 19:50:53,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:53,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 19:50:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:53,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368852698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:53,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:53,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 19:50:53,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644314530] [2021-05-21 19:50:53,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:50:53,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:53,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:50:53,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:50:53,316 INFO L87 Difference]: Start difference. First operand 112 states and 244 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-05-21 19:50:53,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:53,380 INFO L93 Difference]: Finished difference Result 154 states and 311 transitions. [2021-05-21 19:50:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 19:50:53,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 16 [2021-05-21 19:50:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:53,381 INFO L225 Difference]: With dead ends: 154 [2021-05-21 19:50:53,381 INFO L226 Difference]: Without dead ends: 154 [2021-05-21 19:50:53,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-21 19:50:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-21 19:50:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2021-05-21 19:50:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1743119266055047) internal successors, (237), 109 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 237 transitions. [2021-05-21 19:50:53,387 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 237 transitions. Word has length 16 [2021-05-21 19:50:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:53,387 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 237 transitions. [2021-05-21 19:50:53,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-05-21 19:50:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 237 transitions. [2021-05-21 19:50:53,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 19:50:53,389 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:53,389 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:53,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:53,605 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:53,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1537391890, now seen corresponding path program 6 times [2021-05-21 19:50:53,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:53,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063334217] [2021-05-21 19:50:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:53,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:53,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063334217] [2021-05-21 19:50:53,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063334217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:53,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610661414] [2021-05-21 19:50:53,646 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 [2021-05-21 19:50:53,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 19:50:53,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 19:50:53,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:53,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610661414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:53,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:53,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 19:50:53,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23722649] [2021-05-21 19:50:53,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:50:53,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:53,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:50:53,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:50:53,696 INFO L87 Difference]: Start difference. First operand 110 states and 237 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-05-21 19:50:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:53,745 INFO L93 Difference]: Finished difference Result 144 states and 290 transitions. [2021-05-21 19:50:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 19:50:53,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 16 [2021-05-21 19:50:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:53,746 INFO L225 Difference]: With dead ends: 144 [2021-05-21 19:50:53,746 INFO L226 Difference]: Without dead ends: 141 [2021-05-21 19:50:53,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:50:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-21 19:50:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-05-21 19:50:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-05-21 19:50:53,750 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 16 [2021-05-21 19:50:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:53,751 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-05-21 19:50:53,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-05-21 19:50:53,751 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-05-21 19:50:53,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 19:50:53,751 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:53,751 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:53,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:53,965 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2099418526, now seen corresponding path program 7 times [2021-05-21 19:50:53,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:53,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848211365] [2021-05-21 19:50:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:53,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:53,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848211365] [2021-05-21 19:50:53,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848211365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:53,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863681388] [2021-05-21 19:50:53,992 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 [2021-05-21 19:50:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:54,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 19:50:54,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:50:54,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863681388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:54,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:54,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 19:50:54,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630527025] [2021-05-21 19:50:54,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:50:54,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:54,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:50:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:50:54,047 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-05-21 19:50:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:54,106 INFO L93 Difference]: Finished difference Result 195 states and 392 transitions. [2021-05-21 19:50:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 19:50:54,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 16 [2021-05-21 19:50:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:54,107 INFO L225 Difference]: With dead ends: 195 [2021-05-21 19:50:54,107 INFO L226 Difference]: Without dead ends: 195 [2021-05-21 19:50:54,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-21 19:50:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-21 19:50:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 122. [2021-05-21 19:50:54,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1983471074380163) internal successors, (266), 121 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 266 transitions. [2021-05-21 19:50:54,111 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 266 transitions. Word has length 16 [2021-05-21 19:50:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:54,113 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 266 transitions. [2021-05-21 19:50:54,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-05-21 19:50:54,113 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 266 transitions. [2021-05-21 19:50:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 19:50:54,113 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:54,113 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:54,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:54,332 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:54,332 INFO L82 PathProgramCache]: Analyzing trace with hash -177918814, now seen corresponding path program 8 times [2021-05-21 19:50:54,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:54,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549976538] [2021-05-21 19:50:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:54,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:54,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549976538] [2021-05-21 19:50:54,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549976538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:54,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410302203] [2021-05-21 19:50:54,367 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 [2021-05-21 19:50:54,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 19:50:54,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:54,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 19:50:54,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:50:54,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410302203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:54,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:54,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 19:50:54,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107561064] [2021-05-21 19:50:54,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:50:54,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:54,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:50:54,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:50:54,427 INFO L87 Difference]: Start difference. First operand 122 states and 266 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-05-21 19:50:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:54,487 INFO L93 Difference]: Finished difference Result 177 states and 366 transitions. [2021-05-21 19:50:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 19:50:54,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 16 [2021-05-21 19:50:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:54,488 INFO L225 Difference]: With dead ends: 177 [2021-05-21 19:50:54,489 INFO L226 Difference]: Without dead ends: 174 [2021-05-21 19:50:54,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:50:54,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-21 19:50:54,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2021-05-21 19:50:54,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.251968503937008) internal successors, (286), 127 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 286 transitions. [2021-05-21 19:50:54,492 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 286 transitions. Word has length 16 [2021-05-21 19:50:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:54,492 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 286 transitions. [2021-05-21 19:50:54,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-05-21 19:50:54,493 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 286 transitions. [2021-05-21 19:50:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 19:50:54,493 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:54,493 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:54,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-21 19:50:54,701 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:54,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:54,702 INFO L82 PathProgramCache]: Analyzing trace with hash -523408140, now seen corresponding path program 9 times [2021-05-21 19:50:54,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:54,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174843247] [2021-05-21 19:50:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:54,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:54,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174843247] [2021-05-21 19:50:54,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174843247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:54,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118071153] [2021-05-21 19:50:54,759 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 [2021-05-21 19:50:54,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 19:50:54,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:54,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 19:50:54,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:50:54,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118071153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:54,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:54,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 19:50:54,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987933254] [2021-05-21 19:50:54,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:50:54,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:54,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:50:54,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:50:54,827 INFO L87 Difference]: Start difference. First operand 128 states and 286 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-05-21 19:50:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:54,880 INFO L93 Difference]: Finished difference Result 184 states and 383 transitions. [2021-05-21 19:50:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 19:50:54,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 16 [2021-05-21 19:50:54,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:54,882 INFO L225 Difference]: With dead ends: 184 [2021-05-21 19:50:54,882 INFO L226 Difference]: Without dead ends: 184 [2021-05-21 19:50:54,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 19:50:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-21 19:50:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 130. [2021-05-21 19:50:54,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.248062015503876) internal successors, (290), 129 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 290 transitions. [2021-05-21 19:50:54,886 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 290 transitions. Word has length 16 [2021-05-21 19:50:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:54,886 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 290 transitions. [2021-05-21 19:50:54,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-05-21 19:50:54,886 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 290 transitions. [2021-05-21 19:50:54,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 19:50:54,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:54,886 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:55,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:55,093 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1012291370, now seen corresponding path program 10 times [2021-05-21 19:50:55,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:55,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221851225] [2021-05-21 19:50:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:55,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:55,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221851225] [2021-05-21 19:50:55,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221851225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:55,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026571614] [2021-05-21 19:50:55,119 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 [2021-05-21 19:50:55,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 19:50:55,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:55,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 19:50:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:50:55,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026571614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:55,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:55,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 19:50:55,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752992276] [2021-05-21 19:50:55,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:50:55,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:55,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:50:55,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:50:55,185 INFO L87 Difference]: Start difference. First operand 130 states and 290 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-05-21 19:50:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:55,244 INFO L93 Difference]: Finished difference Result 192 states and 395 transitions. [2021-05-21 19:50:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 19:50:55,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 16 [2021-05-21 19:50:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:55,245 INFO L225 Difference]: With dead ends: 192 [2021-05-21 19:50:55,245 INFO L226 Difference]: Without dead ends: 189 [2021-05-21 19:50:55,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:50:55,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-21 19:50:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 130. [2021-05-21 19:50:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.24031007751938) internal successors, (289), 129 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 289 transitions. [2021-05-21 19:50:55,248 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 289 transitions. Word has length 16 [2021-05-21 19:50:55,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:55,249 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 289 transitions. [2021-05-21 19:50:55,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-05-21 19:50:55,249 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 289 transitions. [2021-05-21 19:50:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 19:50:55,249 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:55,249 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:55,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:55,465 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:55,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1596493520, now seen corresponding path program 11 times [2021-05-21 19:50:55,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:55,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617337805] [2021-05-21 19:50:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:55,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:55,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:55,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617337805] [2021-05-21 19:50:55,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617337805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025466279] [2021-05-21 19:50:55,488 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 [2021-05-21 19:50:55,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 19:50:55,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:55,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 19:50:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:55,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025466279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:55,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:55,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 19:50:55,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070439860] [2021-05-21 19:50:55,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:50:55,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:55,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:50:55,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:50:55,549 INFO L87 Difference]: Start difference. First operand 130 states and 289 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-05-21 19:50:55,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:55,647 INFO L93 Difference]: Finished difference Result 173 states and 357 transitions. [2021-05-21 19:50:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 19:50:55,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 16 [2021-05-21 19:50:55,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:55,648 INFO L225 Difference]: With dead ends: 173 [2021-05-21 19:50:55,648 INFO L226 Difference]: Without dead ends: 173 [2021-05-21 19:50:55,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 19:50:55,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-21 19:50:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-05-21 19:50:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.208) internal successors, (276), 125 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 276 transitions. [2021-05-21 19:50:55,651 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 276 transitions. Word has length 16 [2021-05-21 19:50:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:55,651 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 276 transitions. [2021-05-21 19:50:55,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-05-21 19:50:55,651 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 276 transitions. [2021-05-21 19:50:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-21 19:50:55,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:55,652 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:55,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 19:50:55,865 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:55,865 INFO L82 PathProgramCache]: Analyzing trace with hash -474435792, now seen corresponding path program 12 times [2021-05-21 19:50:55,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:55,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856606954] [2021-05-21 19:50:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:55,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:55,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856606954] [2021-05-21 19:50:55,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856606954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:55,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294768889] [2021-05-21 19:50:55,885 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 [2021-05-21 19:50:55,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 19:50:55,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:55,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 19:50:55,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:55,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294768889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:55,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:55,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 19:50:55,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246911033] [2021-05-21 19:50:55,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:50:55,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:55,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:50:55,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:50:55,943 INFO L87 Difference]: Start difference. First operand 126 states and 276 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-05-21 19:50:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:56,003 INFO L93 Difference]: Finished difference Result 188 states and 378 transitions. [2021-05-21 19:50:56,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 19:50:56,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 16 [2021-05-21 19:50:56,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:56,004 INFO L225 Difference]: With dead ends: 188 [2021-05-21 19:50:56,004 INFO L226 Difference]: Without dead ends: 179 [2021-05-21 19:50:56,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 19:50:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-21 19:50:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2021-05-21 19:50:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 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) [2021-05-21 19:50:56,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2021-05-21 19:50:56,007 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 16 [2021-05-21 19:50:56,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:56,008 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2021-05-21 19:50:56,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-05-21 19:50:56,008 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2021-05-21 19:50:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 19:50:56,008 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:56,008 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:56,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 19:50:56,209 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:56,209 INFO L82 PathProgramCache]: Analyzing trace with hash -734527072, now seen corresponding path program 13 times [2021-05-21 19:50:56,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:56,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91777654] [2021-05-21 19:50:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:56,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:56,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91777654] [2021-05-21 19:50:56,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91777654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:56,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714701680] [2021-05-21 19:50:56,242 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 [2021-05-21 19:50:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:56,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 19:50:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:56,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714701680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:56,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:56,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-05-21 19:50:56,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257268179] [2021-05-21 19:50:56,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 19:50:56,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:56,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 19:50:56,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 19:50:56,309 INFO L87 Difference]: Start difference. First operand 132 states and 287 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:56,352 INFO L93 Difference]: Finished difference Result 239 states and 502 transitions. [2021-05-21 19:50:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 19:50:56,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-21 19:50:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:56,353 INFO L225 Difference]: With dead ends: 239 [2021-05-21 19:50:56,354 INFO L226 Difference]: Without dead ends: 230 [2021-05-21 19:50:56,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 19:50:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-21 19:50:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2021-05-21 19:50:56,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2556818181818183) internal successors, (397), 176 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2021-05-21 19:50:56,357 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 18 [2021-05-21 19:50:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:56,357 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2021-05-21 19:50:56,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:56,358 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2021-05-21 19:50:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 19:50:56,358 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:56,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:56,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 19:50:56,559 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash -655786976, now seen corresponding path program 14 times [2021-05-21 19:50:56,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:56,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692965006] [2021-05-21 19:50:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 19:50:56,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:56,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692965006] [2021-05-21 19:50:56,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692965006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:56,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695182326] [2021-05-21 19:50:56,587 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 [2021-05-21 19:50:56,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 19:50:56,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:56,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 19:50:56,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:56,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695182326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:56,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:56,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6] total 7 [2021-05-21 19:50:56,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236858424] [2021-05-21 19:50:56,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 19:50:56,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:56,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 19:50:56,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-21 19:50:56,708 INFO L87 Difference]: Start difference. First operand 177 states and 397 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 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) [2021-05-21 19:50:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:56,801 INFO L93 Difference]: Finished difference Result 343 states and 728 transitions. [2021-05-21 19:50:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 19:50:56,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 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 18 [2021-05-21 19:50:56,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:56,802 INFO L225 Difference]: With dead ends: 343 [2021-05-21 19:50:56,802 INFO L226 Difference]: Without dead ends: 325 [2021-05-21 19:50:56,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 19:50:56,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-21 19:50:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 219. [2021-05-21 19:50:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.311926605504587) internal successors, (504), 218 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 504 transitions. [2021-05-21 19:50:56,808 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 504 transitions. Word has length 18 [2021-05-21 19:50:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:56,808 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 504 transitions. [2021-05-21 19:50:56,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 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) [2021-05-21 19:50:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 504 transitions. [2021-05-21 19:50:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-21 19:50:56,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:56,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:57,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:57,026 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:57,026 INFO L82 PathProgramCache]: Analyzing trace with hash -779503072, now seen corresponding path program 15 times [2021-05-21 19:50:57,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:57,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367966618] [2021-05-21 19:50:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 19:50:57,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:57,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367966618] [2021-05-21 19:50:57,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367966618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:57,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477458011] [2021-05-21 19:50:57,067 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 [2021-05-21 19:50:57,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 19:50:57,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:57,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 19:50:57,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 19:50:57,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477458011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:57,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:57,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-05-21 19:50:57,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572649340] [2021-05-21 19:50:57,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 19:50:57,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:57,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 19:50:57,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 19:50:57,129 INFO L87 Difference]: Start difference. First operand 219 states and 504 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:57,161 INFO L93 Difference]: Finished difference Result 322 states and 711 transitions. [2021-05-21 19:50:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 19:50:57,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-21 19:50:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:57,163 INFO L225 Difference]: With dead ends: 322 [2021-05-21 19:50:57,163 INFO L226 Difference]: Without dead ends: 313 [2021-05-21 19:50:57,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 19:50:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-21 19:50:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 257. [2021-05-21 19:50:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.3359375) internal successors, (598), 256 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 598 transitions. [2021-05-21 19:50:57,169 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 598 transitions. Word has length 18 [2021-05-21 19:50:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:57,169 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 598 transitions. [2021-05-21 19:50:57,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 598 transitions. [2021-05-21 19:50:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:50:57,170 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:57,170 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:57,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:57,385 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash -853552034, now seen corresponding path program 16 times [2021-05-21 19:50:57,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:57,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235523305] [2021-05-21 19:50:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:57,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:57,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235523305] [2021-05-21 19:50:57,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235523305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:57,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673140758] [2021-05-21 19:50:57,414 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 [2021-05-21 19:50:57,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 19:50:57,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:57,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:50:57,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:57,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673140758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:57,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:57,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 19:50:57,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486389720] [2021-05-21 19:50:57,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 19:50:57,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:57,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 19:50:57,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 19:50:57,491 INFO L87 Difference]: Start difference. First operand 257 states and 598 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-05-21 19:50:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:57,602 INFO L93 Difference]: Finished difference Result 402 states and 849 transitions. [2021-05-21 19:50:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:50:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20 [2021-05-21 19:50:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:57,604 INFO L225 Difference]: With dead ends: 402 [2021-05-21 19:50:57,604 INFO L226 Difference]: Without dead ends: 402 [2021-05-21 19:50:57,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-21 19:50:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-05-21 19:50:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 241. [2021-05-21 19:50:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.325) internal successors, (558), 240 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 558 transitions. [2021-05-21 19:50:57,611 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 558 transitions. Word has length 20 [2021-05-21 19:50:57,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:57,611 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 558 transitions. [2021-05-21 19:50:57,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-05-21 19:50:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 558 transitions. [2021-05-21 19:50:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:50:57,612 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:57,612 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:57,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:57,830 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:57,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:57,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1535686302, now seen corresponding path program 17 times [2021-05-21 19:50:57,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:57,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079283494] [2021-05-21 19:50:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:57,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:57,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079283494] [2021-05-21 19:50:57,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079283494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:57,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599820117] [2021-05-21 19:50:57,859 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 [2021-05-21 19:50:57,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 19:50:57,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:57,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:50:57,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:57,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599820117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:57,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:57,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 19:50:57,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954614466] [2021-05-21 19:50:57,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 19:50:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:57,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 19:50:57,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 19:50:57,934 INFO L87 Difference]: Start difference. First operand 241 states and 558 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-05-21 19:50:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:58,023 INFO L93 Difference]: Finished difference Result 375 states and 801 transitions. [2021-05-21 19:50:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:50:58,023 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20 [2021-05-21 19:50:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:58,025 INFO L225 Difference]: With dead ends: 375 [2021-05-21 19:50:58,025 INFO L226 Difference]: Without dead ends: 358 [2021-05-21 19:50:58,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-21 19:50:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-21 19:50:58,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 268. [2021-05-21 19:50:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.3071161048689137) internal successors, (616), 267 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 616 transitions. [2021-05-21 19:50:58,030 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 616 transitions. Word has length 20 [2021-05-21 19:50:58,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:58,031 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 616 transitions. [2021-05-21 19:50:58,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-05-21 19:50:58,031 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 616 transitions. [2021-05-21 19:50:58,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:50:58,032 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:58,032 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:58,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 19:50:58,247 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:58,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:58,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1142582700, now seen corresponding path program 18 times [2021-05-21 19:50:58,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:58,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949645110] [2021-05-21 19:50:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:58,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:58,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949645110] [2021-05-21 19:50:58,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949645110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:58,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224349275] [2021-05-21 19:50:58,270 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 [2021-05-21 19:50:58,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 19:50:58,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:58,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:50:58,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:58,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224349275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:58,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:58,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 19:50:58,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556384478] [2021-05-21 19:50:58,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:50:58,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:58,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:50:58,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:50:58,333 INFO L87 Difference]: Start difference. First operand 268 states and 616 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-21 19:50:58,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:58,396 INFO L93 Difference]: Finished difference Result 358 states and 767 transitions. [2021-05-21 19:50:58,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 19:50:58,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 20 [2021-05-21 19:50:58,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:58,398 INFO L225 Difference]: With dead ends: 358 [2021-05-21 19:50:58,398 INFO L226 Difference]: Without dead ends: 358 [2021-05-21 19:50:58,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-21 19:50:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-05-21 19:50:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 250. [2021-05-21 19:50:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.2610441767068274) internal successors, (563), 249 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:58,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 563 transitions. [2021-05-21 19:50:58,403 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 563 transitions. Word has length 20 [2021-05-21 19:50:58,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:58,403 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 563 transitions. [2021-05-21 19:50:58,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-21 19:50:58,403 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 563 transitions. [2021-05-21 19:50:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:50:58,403 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:58,403 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:58,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 19:50:58,620 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:58,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:58,620 INFO L82 PathProgramCache]: Analyzing trace with hash 653699470, now seen corresponding path program 19 times [2021-05-21 19:50:58,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:58,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030501279] [2021-05-21 19:50:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:58,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:58,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030501279] [2021-05-21 19:50:58,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030501279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:58,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361972674] [2021-05-21 19:50:58,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:58,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:50:58,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:58,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361972674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:58,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:58,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 19:50:58,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061380511] [2021-05-21 19:50:58,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:50:58,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:58,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:50:58,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:50:58,692 INFO L87 Difference]: Start difference. First operand 250 states and 563 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-21 19:50:58,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:58,756 INFO L93 Difference]: Finished difference Result 305 states and 654 transitions. [2021-05-21 19:50:58,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 19:50:58,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 20 [2021-05-21 19:50:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:58,757 INFO L225 Difference]: With dead ends: 305 [2021-05-21 19:50:58,757 INFO L226 Difference]: Without dead ends: 302 [2021-05-21 19:50:58,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 19:50:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-21 19:50:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 250. [2021-05-21 19:50:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.2570281124497993) internal successors, (562), 249 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 562 transitions. [2021-05-21 19:50:58,762 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 562 transitions. Word has length 20 [2021-05-21 19:50:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:58,762 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 562 transitions. [2021-05-21 19:50:58,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-21 19:50:58,762 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 562 transitions. [2021-05-21 19:50:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:50:58,764 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:58,764 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:58,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 19:50:58,983 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:58,983 INFO L82 PathProgramCache]: Analyzing trace with hash -898528034, now seen corresponding path program 20 times [2021-05-21 19:50:58,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:58,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873386077] [2021-05-21 19:50:58,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:59,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:59,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873386077] [2021-05-21 19:50:59,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873386077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:59,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539567017] [2021-05-21 19:50:59,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:59,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 19:50:59,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:59,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:50:59,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:50:59,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539567017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:59,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:59,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 19:50:59,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404718848] [2021-05-21 19:50:59,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:50:59,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:59,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:50:59,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:50:59,058 INFO L87 Difference]: Start difference. First operand 250 states and 562 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-21 19:50:59,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:59,129 INFO L93 Difference]: Finished difference Result 417 states and 879 transitions. [2021-05-21 19:50:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 19:50:59,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 20 [2021-05-21 19:50:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:59,131 INFO L225 Difference]: With dead ends: 417 [2021-05-21 19:50:59,131 INFO L226 Difference]: Without dead ends: 417 [2021-05-21 19:50:59,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-21 19:50:59,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-21 19:50:59,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 268. [2021-05-21 19:50:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.2883895131086143) internal successors, (611), 267 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:59,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 611 transitions. [2021-05-21 19:50:59,136 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 611 transitions. Word has length 20 [2021-05-21 19:50:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:59,136 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 611 transitions. [2021-05-21 19:50:59,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-21 19:50:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 611 transitions. [2021-05-21 19:50:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:50:59,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:59,137 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:59,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 19:50:59,355 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:59,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1119101922, now seen corresponding path program 21 times [2021-05-21 19:50:59,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:59,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783464869] [2021-05-21 19:50:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:50:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:50:59,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:50:59,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783464869] [2021-05-21 19:50:59,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783464869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:59,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899871291] [2021-05-21 19:50:59,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:50:59,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 19:50:59,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:50:59,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:50:59,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:50:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-21 19:50:59,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899871291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:50:59,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:50:59,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-05-21 19:50:59,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808419220] [2021-05-21 19:50:59,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 19:50:59,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:50:59,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 19:50:59,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:50:59,493 INFO L87 Difference]: Start difference. First operand 268 states and 611 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:59,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:50:59,749 INFO L93 Difference]: Finished difference Result 393 states and 847 transitions. [2021-05-21 19:50:59,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 19:50:59,750 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2021-05-21 19:50:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:50:59,751 INFO L225 Difference]: With dead ends: 393 [2021-05-21 19:50:59,751 INFO L226 Difference]: Without dead ends: 313 [2021-05-21 19:50:59,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-05-21 19:50:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-21 19:50:59,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 237. [2021-05-21 19:50:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.3220338983050848) internal successors, (548), 236 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 548 transitions. [2021-05-21 19:50:59,760 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 548 transitions. Word has length 20 [2021-05-21 19:50:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:50:59,761 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 548 transitions. [2021-05-21 19:50:59,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:50:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 548 transitions. [2021-05-21 19:50:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:50:59,762 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:50:59,762 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:50:59,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 19:50:59,977 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:50:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:50:59,977 INFO L82 PathProgramCache]: Analyzing trace with hash 284729366, now seen corresponding path program 22 times [2021-05-21 19:50:59,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:50:59,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980591746] [2021-05-21 19:50:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:50:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:00,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:00,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980591746] [2021-05-21 19:51:00,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980591746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:00,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799172072] [2021-05-21 19:51:00,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:00,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 19:51:00,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:00,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:00,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:00,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799172072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:00,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:00,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 19:51:00,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792670625] [2021-05-21 19:51:00,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:51:00,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:00,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:51:00,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:51:00,063 INFO L87 Difference]: Start difference. First operand 237 states and 548 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-21 19:51:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:00,131 INFO L93 Difference]: Finished difference Result 329 states and 695 transitions. [2021-05-21 19:51:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 19:51:00,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 20 [2021-05-21 19:51:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:00,132 INFO L225 Difference]: With dead ends: 329 [2021-05-21 19:51:00,132 INFO L226 Difference]: Without dead ends: 323 [2021-05-21 19:51:00,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-21 19:51:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-05-21 19:51:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 211. [2021-05-21 19:51:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.3047619047619046) internal successors, (484), 210 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:00,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 484 transitions. [2021-05-21 19:51:00,136 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 484 transitions. Word has length 20 [2021-05-21 19:51:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:00,136 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 484 transitions. [2021-05-21 19:51:00,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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) [2021-05-21 19:51:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 484 transitions. [2021-05-21 19:51:00,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:51:00,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:00,137 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:00,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:00,353 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:00,353 INFO L82 PathProgramCache]: Analyzing trace with hash -299472784, now seen corresponding path program 23 times [2021-05-21 19:51:00,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:00,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993249267] [2021-05-21 19:51:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:00,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:00,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993249267] [2021-05-21 19:51:00,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993249267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:00,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634766295] [2021-05-21 19:51:00,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:00,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 19:51:00,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:00,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:00,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:00,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634766295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:00,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:00,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 19:51:00,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009911660] [2021-05-21 19:51:00,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:51:00,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:00,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:51:00,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:51:00,437 INFO L87 Difference]: Start difference. First operand 211 states and 484 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-21 19:51:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:00,509 INFO L93 Difference]: Finished difference Result 303 states and 631 transitions. [2021-05-21 19:51:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:51:00,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 20 [2021-05-21 19:51:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:00,511 INFO L225 Difference]: With dead ends: 303 [2021-05-21 19:51:00,511 INFO L226 Difference]: Without dead ends: 303 [2021-05-21 19:51:00,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 19:51:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-21 19:51:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 186. [2021-05-21 19:51:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.2324324324324323) internal successors, (413), 185 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 413 transitions. [2021-05-21 19:51:00,517 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 413 transitions. Word has length 20 [2021-05-21 19:51:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:00,517 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 413 transitions. [2021-05-21 19:51:00,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-21 19:51:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 413 transitions. [2021-05-21 19:51:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:51:00,517 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:00,517 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:00,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 19:51:00,733 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 822584944, now seen corresponding path program 24 times [2021-05-21 19:51:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:00,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778213837] [2021-05-21 19:51:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:00,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:00,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778213837] [2021-05-21 19:51:00,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778213837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:00,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343423101] [2021-05-21 19:51:00,939 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:00,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 19:51:00,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:00,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:01,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343423101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:01,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:01,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 19:51:01,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174980426] [2021-05-21 19:51:01,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:51:01,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:01,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:51:01,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:51:01,003 INFO L87 Difference]: Start difference. First operand 186 states and 413 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-21 19:51:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:01,115 INFO L93 Difference]: Finished difference Result 257 states and 522 transitions. [2021-05-21 19:51:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 19:51:01,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 20 [2021-05-21 19:51:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:01,116 INFO L225 Difference]: With dead ends: 257 [2021-05-21 19:51:01,116 INFO L226 Difference]: Without dead ends: 248 [2021-05-21 19:51:01,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:51:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-21 19:51:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 189. [2021-05-21 19:51:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.228723404255319) internal successors, (419), 188 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) [2021-05-21 19:51:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 419 transitions. [2021-05-21 19:51:01,119 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 419 transitions. Word has length 20 [2021-05-21 19:51:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:01,119 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 419 transitions. [2021-05-21 19:51:01,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-21 19:51:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 419 transitions. [2021-05-21 19:51:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:51:01,120 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:01,120 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:01,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:01,333 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:01,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:01,333 INFO L82 PathProgramCache]: Analyzing trace with hash 618096624, now seen corresponding path program 25 times [2021-05-21 19:51:01,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:01,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445923569] [2021-05-21 19:51:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:01,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:01,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445923569] [2021-05-21 19:51:01,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445923569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:01,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172367234] [2021-05-21 19:51:01,377 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 19:51:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:01,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:01,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:01,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172367234] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:01,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:01,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-21 19:51:01,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379445454] [2021-05-21 19:51:01,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:51:01,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:01,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:51:01,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:51:01,453 INFO L87 Difference]: Start difference. First operand 189 states and 419 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-21 19:51:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:01,523 INFO L93 Difference]: Finished difference Result 233 states and 480 transitions. [2021-05-21 19:51:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:51:01,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 20 [2021-05-21 19:51:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:01,524 INFO L225 Difference]: With dead ends: 233 [2021-05-21 19:51:01,524 INFO L226 Difference]: Without dead ends: 224 [2021-05-21 19:51:01,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-21 19:51:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-21 19:51:01,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 188. [2021-05-21 19:51:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2032085561497325) internal successors, (412), 187 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 412 transitions. [2021-05-21 19:51:01,544 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 412 transitions. Word has length 20 [2021-05-21 19:51:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:01,544 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 412 transitions. [2021-05-21 19:51:01,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-05-21 19:51:01,544 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 412 transitions. [2021-05-21 19:51:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:51:01,545 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:01,545 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:01,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 19:51:01,760 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:01,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:01,761 INFO L82 PathProgramCache]: Analyzing trace with hash 469387998, now seen corresponding path program 26 times [2021-05-21 19:51:01,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:01,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75823011] [2021-05-21 19:51:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:01,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:01,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75823011] [2021-05-21 19:51:01,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75823011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:01,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942722119] [2021-05-21 19:51:01,781 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 19:51:01,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 19:51:01,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:01,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:01,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:01,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942722119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:01,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:01,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 19:51:01,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051152558] [2021-05-21 19:51:01,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:51:01,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:01,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:51:01,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:51:01,883 INFO L87 Difference]: Start difference. First operand 188 states and 412 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-05-21 19:51:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:01,957 INFO L93 Difference]: Finished difference Result 289 states and 591 transitions. [2021-05-21 19:51:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 19:51:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 20 [2021-05-21 19:51:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:01,958 INFO L225 Difference]: With dead ends: 289 [2021-05-21 19:51:01,958 INFO L226 Difference]: Without dead ends: 286 [2021-05-21 19:51:01,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-21 19:51:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-21 19:51:01,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 201. [2021-05-21 19:51:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.24) internal successors, (448), 200 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 448 transitions. [2021-05-21 19:51:01,978 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 448 transitions. Word has length 20 [2021-05-21 19:51:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:01,978 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 448 transitions. [2021-05-21 19:51:01,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-05-21 19:51:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 448 transitions. [2021-05-21 19:51:01,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:51:01,978 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:01,978 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:02,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:02,194 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:02,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2141528628, now seen corresponding path program 27 times [2021-05-21 19:51:02,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:02,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387527454] [2021-05-21 19:51:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:02,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:02,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387527454] [2021-05-21 19:51:02,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387527454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:02,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583762070] [2021-05-21 19:51:02,215 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:02,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 19:51:02,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:02,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583762070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:02,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:02,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 19:51:02,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166749041] [2021-05-21 19:51:02,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:51:02,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:02,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:51:02,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:51:02,306 INFO L87 Difference]: Start difference. First operand 201 states and 448 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-05-21 19:51:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:02,385 INFO L93 Difference]: Finished difference Result 308 states and 651 transitions. [2021-05-21 19:51:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 19:51:02,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 20 [2021-05-21 19:51:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:02,388 INFO L225 Difference]: With dead ends: 308 [2021-05-21 19:51:02,388 INFO L226 Difference]: Without dead ends: 308 [2021-05-21 19:51:02,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-21 19:51:02,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-21 19:51:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 218. [2021-05-21 19:51:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2764976958525347) internal successors, (494), 217 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) [2021-05-21 19:51:02,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 494 transitions. [2021-05-21 19:51:02,402 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 494 transitions. Word has length 20 [2021-05-21 19:51:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:02,402 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 494 transitions. [2021-05-21 19:51:02,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-05-21 19:51:02,402 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 494 transitions. [2021-05-21 19:51:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:51:02,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:02,417 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:02,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-21 19:51:02,617 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:02,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1652645398, now seen corresponding path program 28 times [2021-05-21 19:51:02,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:02,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624414468] [2021-05-21 19:51:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:02,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:02,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624414468] [2021-05-21 19:51:02,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624414468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:02,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241420792] [2021-05-21 19:51:02,644 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:02,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 19:51:02,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:02,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:02,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:02,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241420792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:02,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:02,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 19:51:02,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024114567] [2021-05-21 19:51:02,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 19:51:02,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:02,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 19:51:02,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-21 19:51:02,727 INFO L87 Difference]: Start difference. First operand 218 states and 494 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-05-21 19:51:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:02,791 INFO L93 Difference]: Finished difference Result 302 states and 629 transitions. [2021-05-21 19:51:02,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 19:51:02,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 20 [2021-05-21 19:51:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:02,793 INFO L225 Difference]: With dead ends: 302 [2021-05-21 19:51:02,793 INFO L226 Difference]: Without dead ends: 299 [2021-05-21 19:51:02,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-21 19:51:02,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-21 19:51:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 218. [2021-05-21 19:51:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.271889400921659) internal successors, (493), 217 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 493 transitions. [2021-05-21 19:51:02,797 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 493 transitions. Word has length 20 [2021-05-21 19:51:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:02,797 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 493 transitions. [2021-05-21 19:51:02,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-05-21 19:51:02,797 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 493 transitions. [2021-05-21 19:51:02,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:51:02,797 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:02,797 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:03,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:03,018 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:03,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:03,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1068443248, now seen corresponding path program 29 times [2021-05-21 19:51:03,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:03,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851967852] [2021-05-21 19:51:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:03,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:03,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851967852] [2021-05-21 19:51:03,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851967852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:03,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258168913] [2021-05-21 19:51:03,047 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:03,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 19:51:03,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:03,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:03,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258168913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:03,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:03,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-21 19:51:03,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177067871] [2021-05-21 19:51:03,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:51:03,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:03,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:51:03,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:51:03,127 INFO L87 Difference]: Start difference. First operand 218 states and 493 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-05-21 19:51:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:03,245 INFO L93 Difference]: Finished difference Result 318 states and 670 transitions. [2021-05-21 19:51:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:51:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 20 [2021-05-21 19:51:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:03,246 INFO L225 Difference]: With dead ends: 318 [2021-05-21 19:51:03,246 INFO L226 Difference]: Without dead ends: 318 [2021-05-21 19:51:03,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-21 19:51:03,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-21 19:51:03,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 222. [2021-05-21 19:51:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.266968325791855) internal successors, (501), 221 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:03,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 501 transitions. [2021-05-21 19:51:03,250 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 501 transitions. Word has length 20 [2021-05-21 19:51:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:03,250 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 501 transitions. [2021-05-21 19:51:03,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-05-21 19:51:03,250 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 501 transitions. [2021-05-21 19:51:03,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:51:03,251 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:03,251 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:03,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 19:51:03,466 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2104466320, now seen corresponding path program 30 times [2021-05-21 19:51:03,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:03,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873411177] [2021-05-21 19:51:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:03,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:03,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873411177] [2021-05-21 19:51:03,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873411177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:03,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376745208] [2021-05-21 19:51:03,493 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:03,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 19:51:03,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:03,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:03,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:03,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376745208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:03,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:03,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-21 19:51:03,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494530897] [2021-05-21 19:51:03,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:51:03,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:03,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:51:03,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-21 19:51:03,563 INFO L87 Difference]: Start difference. First operand 222 states and 501 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-05-21 19:51:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:03,662 INFO L93 Difference]: Finished difference Result 327 states and 677 transitions. [2021-05-21 19:51:03,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 19:51:03,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 20 [2021-05-21 19:51:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:03,664 INFO L225 Difference]: With dead ends: 327 [2021-05-21 19:51:03,664 INFO L226 Difference]: Without dead ends: 318 [2021-05-21 19:51:03,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-21 19:51:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-21 19:51:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 222. [2021-05-21 19:51:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.257918552036199) internal successors, (499), 221 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 499 transitions. [2021-05-21 19:51:03,667 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 499 transitions. Word has length 20 [2021-05-21 19:51:03,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:03,667 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 499 transitions. [2021-05-21 19:51:03,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-05-21 19:51:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 499 transitions. [2021-05-21 19:51:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:51:03,668 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:03,668 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:03,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:03,883 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:03,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:03,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1481240012, now seen corresponding path program 31 times [2021-05-21 19:51:03,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:03,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867453294] [2021-05-21 19:51:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:03,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:03,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867453294] [2021-05-21 19:51:03,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867453294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:03,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975256637] [2021-05-21 19:51:03,916 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 19:51:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:03,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:03,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:04,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:04,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975256637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:04,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:04,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 19:51:04,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059446476] [2021-05-21 19:51:04,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 19:51:04,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:04,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 19:51:04,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-21 19:51:04,019 INFO L87 Difference]: Start difference. First operand 222 states and 499 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-05-21 19:51:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:04,133 INFO L93 Difference]: Finished difference Result 300 states and 625 transitions. [2021-05-21 19:51:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:51:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 20 [2021-05-21 19:51:04,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:04,134 INFO L225 Difference]: With dead ends: 300 [2021-05-21 19:51:04,134 INFO L226 Difference]: Without dead ends: 297 [2021-05-21 19:51:04,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-21 19:51:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-21 19:51:04,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 206. [2021-05-21 19:51:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2536585365853656) internal successors, (462), 205 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 462 transitions. [2021-05-21 19:51:04,137 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 462 transitions. Word has length 20 [2021-05-21 19:51:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:04,138 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 462 transitions. [2021-05-21 19:51:04,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-05-21 19:51:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 462 transitions. [2021-05-21 19:51:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-21 19:51:04,138 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:04,138 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:04,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 19:51:04,353 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:04,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:04,354 INFO L82 PathProgramCache]: Analyzing trace with hash -33586060, now seen corresponding path program 32 times [2021-05-21 19:51:04,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:04,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596552451] [2021-05-21 19:51:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:04,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:04,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596552451] [2021-05-21 19:51:04,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596552451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:04,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402449219] [2021-05-21 19:51:04,394 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:04,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 19:51:04,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:04,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:04,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:04,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402449219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:04,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:04,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-21 19:51:04,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843503021] [2021-05-21 19:51:04,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 19:51:04,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:04,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 19:51:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-21 19:51:04,478 INFO L87 Difference]: Start difference. First operand 206 states and 462 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-05-21 19:51:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:04,551 INFO L93 Difference]: Finished difference Result 296 states and 607 transitions. [2021-05-21 19:51:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 19:51:04,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 20 [2021-05-21 19:51:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:04,552 INFO L225 Difference]: With dead ends: 296 [2021-05-21 19:51:04,552 INFO L226 Difference]: Without dead ends: 281 [2021-05-21 19:51:04,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-21 19:51:04,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-21 19:51:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 212. [2021-05-21 19:51:04,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.241706161137441) internal successors, (473), 211 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 473 transitions. [2021-05-21 19:51:04,555 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 473 transitions. Word has length 20 [2021-05-21 19:51:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:04,555 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 473 transitions. [2021-05-21 19:51:04,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-05-21 19:51:04,555 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 473 transitions. [2021-05-21 19:51:04,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 19:51:04,556 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:04,556 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:04,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 19:51:04,771 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:04,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1571256086, now seen corresponding path program 33 times [2021-05-21 19:51:04,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:04,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441946240] [2021-05-21 19:51:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:04,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:04,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441946240] [2021-05-21 19:51:04,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441946240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:04,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178714331] [2021-05-21 19:51:04,802 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:04,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 19:51:04,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:04,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:04,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-21 19:51:04,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178714331] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:51:04,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 19:51:04,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-05-21 19:51:04,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181570344] [2021-05-21 19:51:04,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:51:04,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:04,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:51:04,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 19:51:04,892 INFO L87 Difference]: Start difference. First operand 212 states and 473 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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) [2021-05-21 19:51:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:04,948 INFO L93 Difference]: Finished difference Result 239 states and 520 transitions. [2021-05-21 19:51:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 19:51:04,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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 22 [2021-05-21 19:51:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:04,949 INFO L225 Difference]: With dead ends: 239 [2021-05-21 19:51:04,949 INFO L226 Difference]: Without dead ends: 224 [2021-05-21 19:51:04,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-21 19:51:04,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-21 19:51:04,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 209. [2021-05-21 19:51:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1923076923076925) internal successors, (456), 208 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 456 transitions. [2021-05-21 19:51:04,953 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 456 transitions. Word has length 22 [2021-05-21 19:51:04,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:04,953 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 456 transitions. [2021-05-21 19:51:04,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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) [2021-05-21 19:51:04,953 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 456 transitions. [2021-05-21 19:51:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 19:51:04,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:04,953 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:05,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 19:51:05,169 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash 792994068, now seen corresponding path program 34 times [2021-05-21 19:51:05,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:05,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873889986] [2021-05-21 19:51:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:05,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:05,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873889986] [2021-05-21 19:51:05,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873889986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:05,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769210202] [2021-05-21 19:51:05,200 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:05,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 19:51:05,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:05,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 19:51:05,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 19:51:05,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769210202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:05,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:05,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-05-21 19:51:05,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572004964] [2021-05-21 19:51:05,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:51:05,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:05,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:51:05,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:51:05,253 INFO L87 Difference]: Start difference. First operand 209 states and 456 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-05-21 19:51:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:05,309 INFO L93 Difference]: Finished difference Result 322 states and 668 transitions. [2021-05-21 19:51:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 19:51:05,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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 [2021-05-21 19:51:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:05,310 INFO L225 Difference]: With dead ends: 322 [2021-05-21 19:51:05,310 INFO L226 Difference]: Without dead ends: 310 [2021-05-21 19:51:05,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:51:05,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-21 19:51:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 244. [2021-05-21 19:51:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.2181069958847734) internal successors, (539), 243 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:05,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 539 transitions. [2021-05-21 19:51:05,315 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 539 transitions. Word has length 22 [2021-05-21 19:51:05,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:05,315 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 539 transitions. [2021-05-21 19:51:05,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-05-21 19:51:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 539 transitions. [2021-05-21 19:51:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 19:51:05,316 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:05,316 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:05,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 19:51:05,529 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:05,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:05,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1965218720, now seen corresponding path program 35 times [2021-05-21 19:51:05,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:05,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545025005] [2021-05-21 19:51:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 19:51:05,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:05,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545025005] [2021-05-21 19:51:05,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545025005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:05,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754572345] [2021-05-21 19:51:05,560 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:05,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 19:51:05,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 19:51:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 19:51:05,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754572345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:05,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:05,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-05-21 19:51:05,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016647318] [2021-05-21 19:51:05,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:51:05,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:51:05,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:51:05,630 INFO L87 Difference]: Start difference. First operand 244 states and 539 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-05-21 19:51:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:05,681 INFO L93 Difference]: Finished difference Result 375 states and 800 transitions. [2021-05-21 19:51:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 19:51:05,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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 [2021-05-21 19:51:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:05,683 INFO L225 Difference]: With dead ends: 375 [2021-05-21 19:51:05,683 INFO L226 Difference]: Without dead ends: 363 [2021-05-21 19:51:05,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:51:05,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-21 19:51:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 294. [2021-05-21 19:51:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.266211604095563) internal successors, (664), 293 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 664 transitions. [2021-05-21 19:51:05,687 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 664 transitions. Word has length 22 [2021-05-21 19:51:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:05,687 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 664 transitions. [2021-05-21 19:51:05,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-05-21 19:51:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 664 transitions. [2021-05-21 19:51:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 19:51:05,687 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:05,688 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:05,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 19:51:05,901 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:05,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash 116908384, now seen corresponding path program 36 times [2021-05-21 19:51:05,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:05,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59147827] [2021-05-21 19:51:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 19:51:05,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:05,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59147827] [2021-05-21 19:51:05,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59147827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:05,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174648610] [2021-05-21 19:51:05,930 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 19:51:05,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 19:51:05,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:05,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-21 19:51:06,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174648610] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:51:06,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 19:51:06,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-05-21 19:51:06,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096580344] [2021-05-21 19:51:06,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:51:06,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:06,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:51:06,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 19:51:06,013 INFO L87 Difference]: Start difference. First operand 294 states and 664 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2021-05-21 19:51:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:06,081 INFO L93 Difference]: Finished difference Result 320 states and 710 transitions. [2021-05-21 19:51:06,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 19:51:06,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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 22 [2021-05-21 19:51:06,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:06,082 INFO L225 Difference]: With dead ends: 320 [2021-05-21 19:51:06,082 INFO L226 Difference]: Without dead ends: 308 [2021-05-21 19:51:06,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-05-21 19:51:06,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-21 19:51:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 291. [2021-05-21 19:51:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.193103448275862) internal successors, (636), 290 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 636 transitions. [2021-05-21 19:51:06,086 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 636 transitions. Word has length 22 [2021-05-21 19:51:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:06,086 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 636 transitions. [2021-05-21 19:51:06,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 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) [2021-05-21 19:51:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 636 transitions. [2021-05-21 19:51:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 19:51:06,086 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:06,086 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:06,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 19:51:06,301 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:06,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:06,301 INFO L82 PathProgramCache]: Analyzing trace with hash -694299372, now seen corresponding path program 37 times [2021-05-21 19:51:06,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:06,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373194928] [2021-05-21 19:51:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 19:51:06,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:06,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373194928] [2021-05-21 19:51:06,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373194928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:06,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007579047] [2021-05-21 19:51:06,330 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 19:51:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:06,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 19:51:06,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 19:51:06,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007579047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:06,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:06,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-05-21 19:51:06,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234865943] [2021-05-21 19:51:06,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 19:51:06,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:06,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 19:51:06,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:51:06,397 INFO L87 Difference]: Start difference. First operand 291 states and 636 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-05-21 19:51:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:06,447 INFO L93 Difference]: Finished difference Result 425 states and 900 transitions. [2021-05-21 19:51:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 19:51:06,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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 [2021-05-21 19:51:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:06,448 INFO L225 Difference]: With dead ends: 425 [2021-05-21 19:51:06,448 INFO L226 Difference]: Without dead ends: 416 [2021-05-21 19:51:06,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 19:51:06,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-21 19:51:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 350. [2021-05-21 19:51:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.226361031518625) internal successors, (777), 349 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 777 transitions. [2021-05-21 19:51:06,453 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 777 transitions. Word has length 22 [2021-05-21 19:51:06,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:06,453 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 777 transitions. [2021-05-21 19:51:06,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-05-21 19:51:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 777 transitions. [2021-05-21 19:51:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 19:51:06,454 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:06,454 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:06,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-21 19:51:06,670 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:06,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:06,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1224912364, now seen corresponding path program 38 times [2021-05-21 19:51:06,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:06,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304171690] [2021-05-21 19:51:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 19:51:06,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:06,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304171690] [2021-05-21 19:51:06,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304171690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:06,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276594496] [2021-05-21 19:51:06,699 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:06,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 19:51:06,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:06,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 19:51:06,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:06,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276594496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:06,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 19:51:06,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 12 [2021-05-21 19:51:06,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653158674] [2021-05-21 19:51:06,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 19:51:06,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:06,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 19:51:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-21 19:51:06,817 INFO L87 Difference]: Start difference. First operand 350 states and 777 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:06,975 INFO L93 Difference]: Finished difference Result 623 states and 1302 transitions. [2021-05-21 19:51:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 19:51:06,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 19:51:06,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:06,977 INFO L225 Difference]: With dead ends: 623 [2021-05-21 19:51:06,977 INFO L226 Difference]: Without dead ends: 605 [2021-05-21 19:51:06,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-05-21 19:51:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-05-21 19:51:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 410. [2021-05-21 19:51:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.2665036674816625) internal successors, (927), 409 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 927 transitions. [2021-05-21 19:51:06,983 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 927 transitions. Word has length 22 [2021-05-21 19:51:06,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:06,984 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 927 transitions. [2021-05-21 19:51:06,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 927 transitions. [2021-05-21 19:51:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 19:51:06,984 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 19:51:06,984 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 19:51:07,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:07,201 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 19:51:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 19:51:07,201 INFO L82 PathProgramCache]: Analyzing trace with hash -972138362, now seen corresponding path program 39 times [2021-05-21 19:51:07,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 19:51:07,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073415871] [2021-05-21 19:51:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 19:51:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 19:51:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 19:51:07,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 19:51:07,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073415871] [2021-05-21 19:51:07,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073415871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 19:51:07,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911473003] [2021-05-21 19:51:07,235 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:07,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 19:51:07,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 19:51:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 19:51:07,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 19:51:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-21 19:51:07,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911473003] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 19:51:07,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-21 19:51:07,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2021-05-21 19:51:07,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226265385] [2021-05-21 19:51:07,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 19:51:07,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 19:51:07,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 19:51:07,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-21 19:51:07,321 INFO L87 Difference]: Start difference. First operand 410 states and 927 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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) [2021-05-21 19:51:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 19:51:07,400 INFO L93 Difference]: Finished difference Result 428 states and 965 transitions. [2021-05-21 19:51:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 19:51:07,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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 24 [2021-05-21 19:51:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 19:51:07,401 INFO L225 Difference]: With dead ends: 428 [2021-05-21 19:51:07,401 INFO L226 Difference]: Without dead ends: 0 [2021-05-21 19:51:07,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-05-21 19:51:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-21 19:51:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-21 19:51:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 19:51:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-21 19:51:07,402 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-05-21 19:51:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 19:51:07,402 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-21 19:51:07,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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) [2021-05-21 19:51:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-21 19:51:07,402 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-21 19:51:07,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 19:51:07,618 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 19:51:07,620 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 07:51:07 BasicIcfg [2021-05-21 19:51:07,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 19:51:07,620 INFO L168 Benchmark]: Toolchain (without parser) took 16819.86 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 337.7 MB in the beginning and 323.9 MB in the end (delta: 13.9 MB). Peak memory consumption was 87.6 MB. Max. memory is 16.0 GB. [2021-05-21 19:51:07,620 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 358.6 MB. Free memory was 338.8 MB in the beginning and 338.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 19:51:07,620 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.32 ms. Allocated memory is still 358.6 MB. Free memory was 337.7 MB in the beginning and 336.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 19:51:07,620 INFO L168 Benchmark]: Boogie Preprocessor took 10.08 ms. Allocated memory is still 358.6 MB. Free memory was 336.3 MB in the beginning and 335.4 MB in the end (delta: 901.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 19:51:07,620 INFO L168 Benchmark]: RCFGBuilder took 196.67 ms. Allocated memory is still 358.6 MB. Free memory was 335.3 MB in the beginning and 325.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-21 19:51:07,620 INFO L168 Benchmark]: TraceAbstraction took 16590.51 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 325.3 MB in the beginning and 323.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 75.0 MB. Max. memory is 16.0 GB. [2021-05-21 19:51:07,621 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 0.13 ms. Allocated memory is still 358.6 MB. Free memory was 338.8 MB in the beginning and 338.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.32 ms. Allocated memory is still 358.6 MB. Free memory was 337.7 MB in the beginning and 336.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.08 ms. Allocated memory is still 358.6 MB. Free memory was 336.3 MB in the beginning and 335.4 MB in the end (delta: 901.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 196.67 ms. Allocated memory is still 358.6 MB. Free memory was 335.3 MB in the beginning and 325.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 16590.51 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 325.3 MB in the beginning and 323.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 75.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 24]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16531.7ms, OverallIterations: 43, TraceHistogramMax: 4, EmptinessCheckTime: 44.1ms, AutomataDifference: 3303.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 851 SDtfs, 2233 SDslu, 2558 SDs, 0 SdLazy, 3384 SolverSat, 492 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1513.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1102 GetRequests, 676 SyntacticMatches, 60 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2130.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=410occurred in iteration=42, InterpolantAutomatonStates: 408, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 240.5ms AutomataMinimizationTime, 43 MinimizatonAttempts, 2839 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 71.4ms SsaConstructionTime, 282.4ms SatisfiabilityAnalysisTime, 3228.2ms InterpolantComputationTime, 1520 NumberOfCodeBlocks, 1510 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1438 ConstructedInterpolants, 0 QuantifiedInterpolants, 5559 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1167 ConjunctsInSsa, 290 ConjunctsInUnsatCore, 82 InterpolantComputations, 7 PerfectInterpolantSequences, 371/866 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...