/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:22:28,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:22:28,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:22:28,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:22:28,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:22:28,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:22:28,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:22:28,729 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-Separate.epf [2021-05-22 02:22:28,764 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:22:28,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:22:28,765 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:22:28,765 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:22:28,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:22:28,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:22:28,767 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:22:28,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:22:28,768 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:22:28,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:22:28,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:22:28,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:22:28,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:22:28,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:22:28,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:22:28,770 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:22:28,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:22:28,770 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:22:28,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:22:28,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:22:28,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:22:28,770 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:22:28,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:22:28,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:22:28,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:22:28,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:22:28,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:22:28,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:22:28,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:22:28,772 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:22:28,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:22:28,772 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:22:28,772 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:22:29,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:22:29,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:22:29,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:22:29,097 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:22:29,098 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:22:29,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-subst.wvr.bpl [2021-05-22 02:22:29,099 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-subst.wvr.bpl' [2021-05-22 02:22:29,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:22:29,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:22:29,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:22:29,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:22:29,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:22:29,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:29" (1/1) ... [2021-05-22 02:22:29,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:29" (1/1) ... [2021-05-22 02:22:29,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:22:29,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:22:29,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:22:29,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:22:29,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:29" (1/1) ... [2021-05-22 02:22:29,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:29" (1/1) ... [2021-05-22 02:22:29,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:29" (1/1) ... [2021-05-22 02:22:29,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:29" (1/1) ... [2021-05-22 02:22:29,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:29" (1/1) ... [2021-05-22 02:22:29,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:29" (1/1) ... [2021-05-22 02:22:29,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:29" (1/1) ... [2021-05-22 02:22:29,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:22:29,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:22:29,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:22:29,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:22:29,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:29" (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 [2021-05-22 02:22:29,333 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:22:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:22:29,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:22:29,333 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:22:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:22:29,333 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:22:29,334 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:22:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:22:29,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:22:29,334 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:22:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:22:29,334 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:22:29,335 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:22:30,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:22:30,193 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-22 02:22:30,195 INFO L202 PluginConnector]: Adding new model poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:22:30 BoogieIcfgContainer [2021-05-22 02:22:30,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:22:30,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:22:30,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:22:30,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:22:30,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:22:29" (1/2) ... [2021-05-22 02:22:30,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@959a9 and model type poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:22:30, skipping insertion in model container [2021-05-22 02:22:30,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:22:30" (2/2) ... [2021-05-22 02:22:30,204 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-subst.wvr.bpl [2021-05-22 02:22:30,212 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:22:30,213 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:22:30,213 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:22:30,213 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:22:30,264 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:22:30,283 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:22:30,297 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:22:30,298 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:22:30,298 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:22:30,298 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:22:30,298 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:22:30,298 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:22:30,298 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:22:30,298 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:22:30,305 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 37 transitions, 98 flow [2021-05-22 02:22:30,336 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 191 states, 189 states have (on average 4.455026455026455) internal successors, (842), 190 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 191 states, 189 states have (on average 4.455026455026455) internal successors, (842), 190 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:30,355 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:30,355 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:30,355 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:30,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:30,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1233644461, now seen corresponding path program 1 times [2021-05-22 02:22:30,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:30,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411803464] [2021-05-22 02:22:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:30,848 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-22 02:22:30,997 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-05-22 02:22:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:31,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411803464] [2021-05-22 02:22:31,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411803464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:31,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:31,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:31,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930702571] [2021-05-22 02:22:31,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:31,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:31,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:31,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:31,101 INFO L87 Difference]: Start difference. First operand has 191 states, 189 states have (on average 4.455026455026455) internal successors, (842), 190 states have internal predecessors, (842), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:31,229 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-22 02:22:31,418 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-22 02:22:31,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:31,746 INFO L93 Difference]: Finished difference Result 643 states and 2716 transitions. [2021-05-22 02:22:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:22:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 [2021-05-22 02:22:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:31,765 INFO L225 Difference]: With dead ends: 643 [2021-05-22 02:22:31,765 INFO L226 Difference]: Without dead ends: 628 [2021-05-22 02:22:31,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 637.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:22:31,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-05-22 02:22:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 197. [2021-05-22 02:22:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 4.459183673469388) internal successors, (874), 196 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 874 transitions. [2021-05-22 02:22:31,870 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 874 transitions. Word has length 14 [2021-05-22 02:22:31,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:31,871 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 874 transitions. [2021-05-22 02:22:31,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 874 transitions. [2021-05-22 02:22:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:31,873 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:31,874 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:31,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:22:31,874 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:31,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:31,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2024028845, now seen corresponding path program 2 times [2021-05-22 02:22:31,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:31,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184279086] [2021-05-22 02:22:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:32,304 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-05-22 02:22:32,691 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 87 [2021-05-22 02:22:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:32,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:32,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184279086] [2021-05-22 02:22:32,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184279086] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:32,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:32,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:32,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550472680] [2021-05-22 02:22:32,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:32,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:32,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:32,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:32,758 INFO L87 Difference]: Start difference. First operand 197 states and 874 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:33,026 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-22 02:22:33,331 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-05-22 02:22:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:33,405 INFO L93 Difference]: Finished difference Result 478 states and 1888 transitions. [2021-05-22 02:22:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:33,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 [2021-05-22 02:22:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:33,410 INFO L225 Difference]: With dead ends: 478 [2021-05-22 02:22:33,410 INFO L226 Difference]: Without dead ends: 463 [2021-05-22 02:22:33,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 959.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-05-22 02:22:33,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 227. [2021-05-22 02:22:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 4.300884955752212) internal successors, (972), 226 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 972 transitions. [2021-05-22 02:22:33,429 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 972 transitions. Word has length 14 [2021-05-22 02:22:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:33,429 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 972 transitions. [2021-05-22 02:22:33,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:33,429 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 972 transitions. [2021-05-22 02:22:33,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:33,431 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:33,431 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:33,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:22:33,432 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:33,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:33,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1840634711, now seen corresponding path program 3 times [2021-05-22 02:22:33,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:33,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238943965] [2021-05-22 02:22:33,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:33,795 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-05-22 02:22:33,963 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 111 [2021-05-22 02:22:34,341 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 81 [2021-05-22 02:22:34,484 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2021-05-22 02:22:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:34,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:34,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238943965] [2021-05-22 02:22:34,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238943965] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:34,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:34,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:34,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781245572] [2021-05-22 02:22:34,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:34,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:34,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:34,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:34,489 INFO L87 Difference]: Start difference. First operand 227 states and 972 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:34,918 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 128 [2021-05-22 02:22:35,245 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 115 [2021-05-22 02:22:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:35,379 INFO L93 Difference]: Finished difference Result 506 states and 2014 transitions. [2021-05-22 02:22:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 [2021-05-22 02:22:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:35,383 INFO L225 Difference]: With dead ends: 506 [2021-05-22 02:22:35,384 INFO L226 Difference]: Without dead ends: 491 [2021-05-22 02:22:35,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1324.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-05-22 02:22:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 234. [2021-05-22 02:22:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 4.309012875536481) internal successors, (1004), 233 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 1004 transitions. [2021-05-22 02:22:35,398 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 1004 transitions. Word has length 14 [2021-05-22 02:22:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:35,399 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 1004 transitions. [2021-05-22 02:22:35,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 1004 transitions. [2021-05-22 02:22:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:35,401 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:35,401 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:35,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:22:35,401 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash -867555397, now seen corresponding path program 4 times [2021-05-22 02:22:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:35,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748170674] [2021-05-22 02:22:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:35,946 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2021-05-22 02:22:36,073 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 131 [2021-05-22 02:22:36,547 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 98 [2021-05-22 02:22:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:36,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:36,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748170674] [2021-05-22 02:22:36,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748170674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:36,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:36,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:36,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987203888] [2021-05-22 02:22:36,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:36,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:36,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:36,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:36,648 INFO L87 Difference]: Start difference. First operand 234 states and 1004 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:37,092 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 129 [2021-05-22 02:22:37,447 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 117 [2021-05-22 02:22:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:37,567 INFO L93 Difference]: Finished difference Result 526 states and 2085 transitions. [2021-05-22 02:22:37,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:37,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 [2021-05-22 02:22:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:37,571 INFO L225 Difference]: With dead ends: 526 [2021-05-22 02:22:37,571 INFO L226 Difference]: Without dead ends: 511 [2021-05-22 02:22:37,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1677.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-05-22 02:22:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 240. [2021-05-22 02:22:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 4.2803347280334725) internal successors, (1023), 239 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:37,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 1023 transitions. [2021-05-22 02:22:37,583 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 1023 transitions. Word has length 14 [2021-05-22 02:22:37,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:37,584 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 1023 transitions. [2021-05-22 02:22:37,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:37,584 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 1023 transitions. [2021-05-22 02:22:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:37,587 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:37,588 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:37,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:22:37,588 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:37,588 INFO L82 PathProgramCache]: Analyzing trace with hash 922889575, now seen corresponding path program 5 times [2021-05-22 02:22:37,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:37,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804800015] [2021-05-22 02:22:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:37,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:37,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804800015] [2021-05-22 02:22:37,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804800015] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:37,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:37,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:37,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196201610] [2021-05-22 02:22:37,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:37,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:37,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:37,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:37,931 INFO L87 Difference]: Start difference. First operand 240 states and 1023 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:38,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:38,279 INFO L93 Difference]: Finished difference Result 697 states and 2896 transitions. [2021-05-22 02:22:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:22:38,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 [2021-05-22 02:22:38,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:38,284 INFO L225 Difference]: With dead ends: 697 [2021-05-22 02:22:38,284 INFO L226 Difference]: Without dead ends: 682 [2021-05-22 02:22:38,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:22:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-05-22 02:22:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 242. [2021-05-22 02:22:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 4.2987551867219915) internal successors, (1036), 241 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 1036 transitions. [2021-05-22 02:22:38,299 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 1036 transitions. Word has length 14 [2021-05-22 02:22:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:38,299 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 1036 transitions. [2021-05-22 02:22:38,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 1036 transitions. [2021-05-22 02:22:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:22:38,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:38,300 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:38,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:22:38,300 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:38,302 INFO L82 PathProgramCache]: Analyzing trace with hash 594755113, now seen corresponding path program 6 times [2021-05-22 02:22:38,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:38,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314374773] [2021-05-22 02:22:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:38,587 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-05-22 02:22:38,892 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2021-05-22 02:22:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:38,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:38,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314374773] [2021-05-22 02:22:38,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314374773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:38,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:38,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:38,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313917567] [2021-05-22 02:22:38,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:38,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:38,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:38,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:38,939 INFO L87 Difference]: Start difference. First operand 242 states and 1036 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:39,148 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-22 02:22:39,329 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-22 02:22:39,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:39,399 INFO L93 Difference]: Finished difference Result 505 states and 1974 transitions. [2021-05-22 02:22:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:39,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 [2021-05-22 02:22:39,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:39,403 INFO L225 Difference]: With dead ends: 505 [2021-05-22 02:22:39,403 INFO L226 Difference]: Without dead ends: 490 [2021-05-22 02:22:39,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 777.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:39,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-22 02:22:39,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 263. [2021-05-22 02:22:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 4.198473282442748) internal successors, (1100), 262 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 1100 transitions. [2021-05-22 02:22:39,415 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 1100 transitions. Word has length 14 [2021-05-22 02:22:39,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:39,416 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 1100 transitions. [2021-05-22 02:22:39,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2021-05-22 02:22:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 1100 transitions. [2021-05-22 02:22:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:39,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:39,417 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:39,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:22:39,417 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:39,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:39,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1067380313, now seen corresponding path program 1 times [2021-05-22 02:22:39,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:39,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808092510] [2021-05-22 02:22:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:39,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:39,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808092510] [2021-05-22 02:22:39,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808092510] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:39,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:39,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:39,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605133478] [2021-05-22 02:22:39,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:39,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:39,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:39,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,435 INFO L87 Difference]: Start difference. First operand 263 states and 1100 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:39,440 INFO L93 Difference]: Finished difference Result 303 states and 1256 transitions. [2021-05-22 02:22:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:39,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:22:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:39,443 INFO L225 Difference]: With dead ends: 303 [2021-05-22 02:22:39,443 INFO L226 Difference]: Without dead ends: 303 [2021-05-22 02:22:39,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-22 02:22:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-05-22 02:22:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 4.158940397350993) internal successors, (1256), 302 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 1256 transitions. [2021-05-22 02:22:39,452 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 1256 transitions. Word has length 15 [2021-05-22 02:22:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:39,452 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 1256 transitions. [2021-05-22 02:22:39,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 1256 transitions. [2021-05-22 02:22:39,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:39,454 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:39,454 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:39,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:22:39,454 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:39,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1654834201, now seen corresponding path program 1 times [2021-05-22 02:22:39,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:39,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147202224] [2021-05-22 02:22:39,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:39,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:39,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147202224] [2021-05-22 02:22:39,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147202224] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:39,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:39,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:39,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271129000] [2021-05-22 02:22:39,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:39,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:39,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:39,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,468 INFO L87 Difference]: Start difference. First operand 303 states and 1256 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:39,474 INFO L93 Difference]: Finished difference Result 343 states and 1412 transitions. [2021-05-22 02:22:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:39,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:22:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:39,476 INFO L225 Difference]: With dead ends: 343 [2021-05-22 02:22:39,476 INFO L226 Difference]: Without dead ends: 343 [2021-05-22 02:22:39,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-05-22 02:22:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2021-05-22 02:22:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 4.128654970760234) internal successors, (1412), 342 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1412 transitions. [2021-05-22 02:22:39,488 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1412 transitions. Word has length 15 [2021-05-22 02:22:39,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:39,488 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1412 transitions. [2021-05-22 02:22:39,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,488 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1412 transitions. [2021-05-22 02:22:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:39,489 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:39,489 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:39,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-22 02:22:39,489 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:39,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2109293491, now seen corresponding path program 1 times [2021-05-22 02:22:39,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:39,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681289642] [2021-05-22 02:22:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:39,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:39,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681289642] [2021-05-22 02:22:39,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681289642] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:39,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:39,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:39,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374706958] [2021-05-22 02:22:39,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:39,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:39,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:39,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,520 INFO L87 Difference]: Start difference. First operand 343 states and 1412 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:39,527 INFO L93 Difference]: Finished difference Result 386 states and 1566 transitions. [2021-05-22 02:22:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:39,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:22:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:39,534 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:22:39,534 INFO L226 Difference]: Without dead ends: 386 [2021-05-22 02:22:39,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-05-22 02:22:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-05-22 02:22:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 4.067532467532468) internal successors, (1566), 385 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1566 transitions. [2021-05-22 02:22:39,547 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1566 transitions. Word has length 15 [2021-05-22 02:22:39,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:39,547 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1566 transitions. [2021-05-22 02:22:39,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,548 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1566 transitions. [2021-05-22 02:22:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:39,549 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:39,549 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:39,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:22:39,549 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:39,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1748926659, now seen corresponding path program 1 times [2021-05-22 02:22:39,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:39,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279715533] [2021-05-22 02:22:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:39,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:39,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279715533] [2021-05-22 02:22:39,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279715533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:39,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:39,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:39,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442380914] [2021-05-22 02:22:39,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:39,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:39,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:39,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,573 INFO L87 Difference]: Start difference. First operand 386 states and 1566 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:39,580 INFO L93 Difference]: Finished difference Result 439 states and 1766 transitions. [2021-05-22 02:22:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:39,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:22:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:39,583 INFO L225 Difference]: With dead ends: 439 [2021-05-22 02:22:39,583 INFO L226 Difference]: Without dead ends: 439 [2021-05-22 02:22:39,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-05-22 02:22:39,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2021-05-22 02:22:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 4.031963470319635) internal successors, (1766), 438 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1766 transitions. [2021-05-22 02:22:39,596 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1766 transitions. Word has length 15 [2021-05-22 02:22:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:39,597 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1766 transitions. [2021-05-22 02:22:39,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1766 transitions. [2021-05-22 02:22:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:39,598 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:39,598 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:39,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-22 02:22:39,598 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:39,599 INFO L82 PathProgramCache]: Analyzing trace with hash 181705837, now seen corresponding path program 1 times [2021-05-22 02:22:39,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:39,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302070998] [2021-05-22 02:22:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:39,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:39,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302070998] [2021-05-22 02:22:39,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302070998] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:39,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:39,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:39,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990353892] [2021-05-22 02:22:39,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:39,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:39,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:39,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,618 INFO L87 Difference]: Start difference. First operand 439 states and 1766 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:39,624 INFO L93 Difference]: Finished difference Result 489 states and 1957 transitions. [2021-05-22 02:22:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:39,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:22:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:39,628 INFO L225 Difference]: With dead ends: 489 [2021-05-22 02:22:39,628 INFO L226 Difference]: Without dead ends: 489 [2021-05-22 02:22:39,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-05-22 02:22:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 489. [2021-05-22 02:22:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 4.010245901639344) internal successors, (1957), 488 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1957 transitions. [2021-05-22 02:22:39,642 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1957 transitions. Word has length 15 [2021-05-22 02:22:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:39,644 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1957 transitions. [2021-05-22 02:22:39,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1957 transitions. [2021-05-22 02:22:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:22:39,645 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:39,645 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:39,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-22 02:22:39,646 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash 542072669, now seen corresponding path program 1 times [2021-05-22 02:22:39,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:39,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457645313] [2021-05-22 02:22:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:39,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:39,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457645313] [2021-05-22 02:22:39,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457645313] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:39,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:39,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:22:39,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277572152] [2021-05-22 02:22:39,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:22:39,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:22:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,662 INFO L87 Difference]: Start difference. First operand 489 states and 1957 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:39,668 INFO L93 Difference]: Finished difference Result 549 states and 2181 transitions. [2021-05-22 02:22:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:22:39,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:22:39,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:39,673 INFO L225 Difference]: With dead ends: 549 [2021-05-22 02:22:39,673 INFO L226 Difference]: Without dead ends: 549 [2021-05-22 02:22:39,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:22:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-05-22 02:22:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2021-05-22 02:22:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 3.97992700729927) internal successors, (2181), 548 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 2181 transitions. [2021-05-22 02:22:39,692 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 2181 transitions. Word has length 15 [2021-05-22 02:22:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:39,693 INFO L482 AbstractCegarLoop]: Abstraction has 549 states and 2181 transitions. [2021-05-22 02:22:39,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 2181 transitions. [2021-05-22 02:22:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:39,694 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:39,694 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:39,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-22 02:22:39,695 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:39,695 INFO L82 PathProgramCache]: Analyzing trace with hash -85243986, now seen corresponding path program 1 times [2021-05-22 02:22:39,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:39,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019745269] [2021-05-22 02:22:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:39,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:39,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019745269] [2021-05-22 02:22:39,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019745269] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:39,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:39,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:39,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151988364] [2021-05-22 02:22:39,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:39,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:39,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:39,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:39,719 INFO L87 Difference]: Start difference. First operand 549 states and 2181 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:39,755 INFO L93 Difference]: Finished difference Result 789 states and 2890 transitions. [2021-05-22 02:22:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:22:39,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:39,759 INFO L225 Difference]: With dead ends: 789 [2021-05-22 02:22:39,759 INFO L226 Difference]: Without dead ends: 689 [2021-05-22 02:22:39,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-05-22 02:22:39,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 565. [2021-05-22 02:22:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.891843971631206) internal successors, (2195), 564 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2195 transitions. [2021-05-22 02:22:39,799 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2195 transitions. Word has length 16 [2021-05-22 02:22:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:39,799 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 2195 transitions. [2021-05-22 02:22:39,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2195 transitions. [2021-05-22 02:22:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:39,801 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:39,801 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:39,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-22 02:22:39,801 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:39,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1662493965, now seen corresponding path program 1 times [2021-05-22 02:22:39,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:39,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468288351] [2021-05-22 02:22:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:39,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:39,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468288351] [2021-05-22 02:22:39,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468288351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:39,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:39,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:39,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19256670] [2021-05-22 02:22:39,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:39,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:39,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:39,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:39,833 INFO L87 Difference]: Start difference. First operand 565 states and 2195 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:39,877 INFO L93 Difference]: Finished difference Result 840 states and 3070 transitions. [2021-05-22 02:22:39,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:22:39,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:39,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:39,881 INFO L225 Difference]: With dead ends: 840 [2021-05-22 02:22:39,882 INFO L226 Difference]: Without dead ends: 740 [2021-05-22 02:22:39,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-05-22 02:22:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 573. [2021-05-22 02:22:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 3.8583916083916083) internal successors, (2207), 572 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 2207 transitions. [2021-05-22 02:22:39,901 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 2207 transitions. Word has length 16 [2021-05-22 02:22:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:39,901 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 2207 transitions. [2021-05-22 02:22:39,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 2207 transitions. [2021-05-22 02:22:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:39,903 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:39,903 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:39,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-22 02:22:39,903 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:39,904 INFO L82 PathProgramCache]: Analyzing trace with hash -881757258, now seen corresponding path program 1 times [2021-05-22 02:22:39,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:39,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142103326] [2021-05-22 02:22:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:40,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:40,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142103326] [2021-05-22 02:22:40,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142103326] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:40,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:40,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:40,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709942023] [2021-05-22 02:22:40,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:40,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:40,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:40,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:40,008 INFO L87 Difference]: Start difference. First operand 573 states and 2207 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:40,132 INFO L93 Difference]: Finished difference Result 872 states and 3015 transitions. [2021-05-22 02:22:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:40,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:40,137 INFO L225 Difference]: With dead ends: 872 [2021-05-22 02:22:40,137 INFO L226 Difference]: Without dead ends: 830 [2021-05-22 02:22:40,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-05-22 02:22:40,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 559. [2021-05-22 02:22:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.774193548387097) internal successors, (2106), 558 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 2106 transitions. [2021-05-22 02:22:40,156 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 2106 transitions. Word has length 16 [2021-05-22 02:22:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:40,157 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 2106 transitions. [2021-05-22 02:22:40,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 2106 transitions. [2021-05-22 02:22:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:40,158 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:40,158 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:40,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-22 02:22:40,159 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:40,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:40,159 INFO L82 PathProgramCache]: Analyzing trace with hash 768619160, now seen corresponding path program 1 times [2021-05-22 02:22:40,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:40,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589323406] [2021-05-22 02:22:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:40,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:40,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589323406] [2021-05-22 02:22:40,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589323406] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:40,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:40,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:40,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608797686] [2021-05-22 02:22:40,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:40,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:40,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:40,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:40,222 INFO L87 Difference]: Start difference. First operand 559 states and 2106 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:40,299 INFO L93 Difference]: Finished difference Result 866 states and 2937 transitions. [2021-05-22 02:22:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:40,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:40,303 INFO L225 Difference]: With dead ends: 866 [2021-05-22 02:22:40,303 INFO L226 Difference]: Without dead ends: 813 [2021-05-22 02:22:40,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-05-22 02:22:40,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 579. [2021-05-22 02:22:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 3.7024221453287196) internal successors, (2140), 578 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 2140 transitions. [2021-05-22 02:22:40,319 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 2140 transitions. Word has length 16 [2021-05-22 02:22:40,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:40,319 INFO L482 AbstractCegarLoop]: Abstraction has 579 states and 2140 transitions. [2021-05-22 02:22:40,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,320 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 2140 transitions. [2021-05-22 02:22:40,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:40,321 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:40,321 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:40,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-22 02:22:40,321 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:40,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:40,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1488759573, now seen corresponding path program 1 times [2021-05-22 02:22:40,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:40,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700701627] [2021-05-22 02:22:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:40,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:40,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700701627] [2021-05-22 02:22:40,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700701627] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:40,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:40,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:40,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822780210] [2021-05-22 02:22:40,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:40,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:40,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:40,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:40,666 INFO L87 Difference]: Start difference. First operand 579 states and 2140 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:40,885 INFO L93 Difference]: Finished difference Result 927 states and 3194 transitions. [2021-05-22 02:22:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:40,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:40,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:40,890 INFO L225 Difference]: With dead ends: 927 [2021-05-22 02:22:40,890 INFO L226 Difference]: Without dead ends: 885 [2021-05-22 02:22:40,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 363.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-05-22 02:22:40,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 579. [2021-05-22 02:22:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 3.6955017301038064) internal successors, (2136), 578 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 2136 transitions. [2021-05-22 02:22:40,906 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 2136 transitions. Word has length 16 [2021-05-22 02:22:40,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:40,906 INFO L482 AbstractCegarLoop]: Abstraction has 579 states and 2136 transitions. [2021-05-22 02:22:40,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,906 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 2136 transitions. [2021-05-22 02:22:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:40,908 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:40,908 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:40,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-22 02:22:40,908 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:40,909 INFO L82 PathProgramCache]: Analyzing trace with hash 185156587, now seen corresponding path program 1 times [2021-05-22 02:22:40,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:40,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281420702] [2021-05-22 02:22:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:40,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:40,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281420702] [2021-05-22 02:22:40,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281420702] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:40,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:40,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:40,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545859311] [2021-05-22 02:22:40,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:40,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:40,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:40,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:40,946 INFO L87 Difference]: Start difference. First operand 579 states and 2136 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:40,980 INFO L93 Difference]: Finished difference Result 694 states and 2355 transitions. [2021-05-22 02:22:40,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:22:40,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:40,988 INFO L225 Difference]: With dead ends: 694 [2021-05-22 02:22:40,988 INFO L226 Difference]: Without dead ends: 613 [2021-05-22 02:22:40,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-05-22 02:22:40,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 538. [2021-05-22 02:22:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 3.6033519553072626) internal successors, (1935), 537 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1935 transitions. [2021-05-22 02:22:41,002 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1935 transitions. Word has length 16 [2021-05-22 02:22:41,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:41,003 INFO L482 AbstractCegarLoop]: Abstraction has 538 states and 1935 transitions. [2021-05-22 02:22:41,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:41,003 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1935 transitions. [2021-05-22 02:22:41,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:41,004 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:41,005 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:41,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-22 02:22:41,005 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:41,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1227931188, now seen corresponding path program 2 times [2021-05-22 02:22:41,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:41,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716679592] [2021-05-22 02:22:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:41,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:41,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716679592] [2021-05-22 02:22:41,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716679592] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:41,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:41,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:41,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593929978] [2021-05-22 02:22:41,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:41,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:41,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:41,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:41,132 INFO L87 Difference]: Start difference. First operand 538 states and 1935 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:41,341 INFO L93 Difference]: Finished difference Result 932 states and 3138 transitions. [2021-05-22 02:22:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:41,348 INFO L225 Difference]: With dead ends: 932 [2021-05-22 02:22:41,348 INFO L226 Difference]: Without dead ends: 909 [2021-05-22 02:22:41,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:22:41,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-05-22 02:22:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 538. [2021-05-22 02:22:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 3.6033519553072626) internal successors, (1935), 537 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1935 transitions. [2021-05-22 02:22:41,362 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1935 transitions. Word has length 16 [2021-05-22 02:22:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:41,363 INFO L482 AbstractCegarLoop]: Abstraction has 538 states and 1935 transitions. [2021-05-22 02:22:41,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1935 transitions. [2021-05-22 02:22:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:41,364 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:41,364 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:41,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-22 02:22:41,365 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:41,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:41,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1214418261, now seen corresponding path program 2 times [2021-05-22 02:22:41,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:41,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806832174] [2021-05-22 02:22:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:41,580 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-05-22 02:22:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:41,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:41,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806832174] [2021-05-22 02:22:41,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806832174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:41,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:41,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:41,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339182962] [2021-05-22 02:22:41,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:41,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:41,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:41,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:41,688 INFO L87 Difference]: Start difference. First operand 538 states and 1935 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:41,820 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2021-05-22 02:22:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:42,048 INFO L93 Difference]: Finished difference Result 926 states and 3115 transitions. [2021-05-22 02:22:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:22:42,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:42,052 INFO L225 Difference]: With dead ends: 926 [2021-05-22 02:22:42,052 INFO L226 Difference]: Without dead ends: 899 [2021-05-22 02:22:42,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 490.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-05-22 02:22:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 538. [2021-05-22 02:22:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 3.5996275605214154) internal successors, (1933), 537 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1933 transitions. [2021-05-22 02:22:42,066 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1933 transitions. Word has length 16 [2021-05-22 02:22:42,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:42,066 INFO L482 AbstractCegarLoop]: Abstraction has 538 states and 1933 transitions. [2021-05-22 02:22:42,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1933 transitions. [2021-05-22 02:22:42,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:42,068 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:42,068 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:42,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-22 02:22:42,068 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:42,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:42,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1866944204, now seen corresponding path program 2 times [2021-05-22 02:22:42,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:42,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367072639] [2021-05-22 02:22:42,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:42,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:42,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367072639] [2021-05-22 02:22:42,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367072639] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:42,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:42,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:42,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615062508] [2021-05-22 02:22:42,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:42,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:42,136 INFO L87 Difference]: Start difference. First operand 538 states and 1933 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:42,243 INFO L93 Difference]: Finished difference Result 1016 states and 3326 transitions. [2021-05-22 02:22:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:22:42,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:42,247 INFO L225 Difference]: With dead ends: 1016 [2021-05-22 02:22:42,247 INFO L226 Difference]: Without dead ends: 898 [2021-05-22 02:22:42,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-05-22 02:22:42,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 517. [2021-05-22 02:22:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.560077519379845) internal successors, (1837), 516 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1837 transitions. [2021-05-22 02:22:42,261 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1837 transitions. Word has length 16 [2021-05-22 02:22:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:42,261 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1837 transitions. [2021-05-22 02:22:42,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1837 transitions. [2021-05-22 02:22:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:42,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:42,263 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:42,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-22 02:22:42,263 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1453708437, now seen corresponding path program 2 times [2021-05-22 02:22:42,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:42,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723871023] [2021-05-22 02:22:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:42,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:42,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723871023] [2021-05-22 02:22:42,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723871023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:42,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:42,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:42,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492629428] [2021-05-22 02:22:42,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:42,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:42,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:42,425 INFO L87 Difference]: Start difference. First operand 517 states and 1837 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:42,642 INFO L93 Difference]: Finished difference Result 1074 states and 3461 transitions. [2021-05-22 02:22:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:22:42,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:42,645 INFO L225 Difference]: With dead ends: 1074 [2021-05-22 02:22:42,645 INFO L226 Difference]: Without dead ends: 945 [2021-05-22 02:22:42,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-05-22 02:22:42,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 487. [2021-05-22 02:22:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.403292181069959) internal successors, (1654), 486 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1654 transitions. [2021-05-22 02:22:42,658 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1654 transitions. Word has length 16 [2021-05-22 02:22:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:42,658 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1654 transitions. [2021-05-22 02:22:42,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1654 transitions. [2021-05-22 02:22:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:42,659 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:42,659 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:42,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-22 02:22:42,660 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:42,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:42,660 INFO L82 PathProgramCache]: Analyzing trace with hash 486403162, now seen corresponding path program 3 times [2021-05-22 02:22:42,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:42,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492604259] [2021-05-22 02:22:42,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:42,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:42,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492604259] [2021-05-22 02:22:42,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492604259] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:42,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:42,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:42,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354544947] [2021-05-22 02:22:42,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:42,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:42,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:42,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:42,713 INFO L87 Difference]: Start difference. First operand 487 states and 1654 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:42,807 INFO L93 Difference]: Finished difference Result 655 states and 2082 transitions. [2021-05-22 02:22:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:42,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:42,809 INFO L225 Difference]: With dead ends: 655 [2021-05-22 02:22:42,810 INFO L226 Difference]: Without dead ends: 632 [2021-05-22 02:22:42,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-05-22 02:22:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 506. [2021-05-22 02:22:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.368316831683168) internal successors, (1701), 505 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1701 transitions. [2021-05-22 02:22:42,821 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1701 transitions. Word has length 16 [2021-05-22 02:22:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:42,821 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1701 transitions. [2021-05-22 02:22:42,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1701 transitions. [2021-05-22 02:22:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:42,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:42,823 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:42,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-22 02:22:42,823 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:42,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1119769510, now seen corresponding path program 4 times [2021-05-22 02:22:42,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:42,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437118162] [2021-05-22 02:22:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:42,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:42,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437118162] [2021-05-22 02:22:42,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437118162] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:42,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:42,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:42,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162519127] [2021-05-22 02:22:42,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:42,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:42,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:42,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:42,882 INFO L87 Difference]: Start difference. First operand 506 states and 1701 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:42,977 INFO L93 Difference]: Finished difference Result 683 states and 2161 transitions. [2021-05-22 02:22:42,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:42,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:42,979 INFO L225 Difference]: With dead ends: 683 [2021-05-22 02:22:42,979 INFO L226 Difference]: Without dead ends: 660 [2021-05-22 02:22:42,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-05-22 02:22:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 516. [2021-05-22 02:22:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.3514563106796116) internal successors, (1726), 515 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1726 transitions. [2021-05-22 02:22:42,991 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1726 transitions. Word has length 16 [2021-05-22 02:22:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:42,991 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1726 transitions. [2021-05-22 02:22:42,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:42,991 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1726 transitions. [2021-05-22 02:22:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:42,992 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:42,992 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:42,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-22 02:22:42,993 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash 423749436, now seen corresponding path program 3 times [2021-05-22 02:22:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:42,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289728964] [2021-05-22 02:22:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:43,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:43,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289728964] [2021-05-22 02:22:43,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289728964] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:43,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:43,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:43,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758335070] [2021-05-22 02:22:43,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:43,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:43,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:43,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:43,040 INFO L87 Difference]: Start difference. First operand 516 states and 1726 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:43,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:43,100 INFO L93 Difference]: Finished difference Result 649 states and 2018 transitions. [2021-05-22 02:22:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:43,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:43,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:43,102 INFO L225 Difference]: With dead ends: 649 [2021-05-22 02:22:43,102 INFO L226 Difference]: Without dead ends: 600 [2021-05-22 02:22:43,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-05-22 02:22:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 480. [2021-05-22 02:22:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.3194154488517746) internal successors, (1590), 479 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1590 transitions. [2021-05-22 02:22:43,118 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1590 transitions. Word has length 16 [2021-05-22 02:22:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:43,118 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1590 transitions. [2021-05-22 02:22:43,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1590 transitions. [2021-05-22 02:22:43,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:43,121 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:43,121 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:43,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-22 02:22:43,121 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2014690215, now seen corresponding path program 3 times [2021-05-22 02:22:43,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:43,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890765083] [2021-05-22 02:22:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:43,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:43,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890765083] [2021-05-22 02:22:43,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890765083] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:43,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:43,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:43,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541070618] [2021-05-22 02:22:43,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:43,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:43,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:43,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:43,320 INFO L87 Difference]: Start difference. First operand 480 states and 1590 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:43,582 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2021-05-22 02:22:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:43,609 INFO L93 Difference]: Finished difference Result 598 states and 1850 transitions. [2021-05-22 02:22:43,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:43,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:43,610 INFO L225 Difference]: With dead ends: 598 [2021-05-22 02:22:43,611 INFO L226 Difference]: Without dead ends: 556 [2021-05-22 02:22:43,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-05-22 02:22:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 480. [2021-05-22 02:22:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.30062630480167) internal successors, (1581), 479 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1581 transitions. [2021-05-22 02:22:43,621 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1581 transitions. Word has length 16 [2021-05-22 02:22:43,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:43,621 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1581 transitions. [2021-05-22 02:22:43,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:43,621 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1581 transitions. [2021-05-22 02:22:43,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:43,622 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:43,622 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:43,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-22 02:22:43,623 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:43,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1307197767, now seen corresponding path program 4 times [2021-05-22 02:22:43,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:43,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107769075] [2021-05-22 02:22:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:43,789 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-05-22 02:22:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:43,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:43,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107769075] [2021-05-22 02:22:43,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107769075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:43,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:43,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:43,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614081395] [2021-05-22 02:22:43,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:43,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:43,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:43,816 INFO L87 Difference]: Start difference. First operand 480 states and 1581 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:44,093 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2021-05-22 02:22:44,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:44,115 INFO L93 Difference]: Finished difference Result 587 states and 1814 transitions. [2021-05-22 02:22:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:44,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:44,117 INFO L225 Difference]: With dead ends: 587 [2021-05-22 02:22:44,117 INFO L226 Difference]: Without dead ends: 554 [2021-05-22 02:22:44,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-05-22 02:22:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 480. [2021-05-22 02:22:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.290187891440501) internal successors, (1576), 479 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1576 transitions. [2021-05-22 02:22:44,135 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1576 transitions. Word has length 16 [2021-05-22 02:22:44,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:44,135 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1576 transitions. [2021-05-22 02:22:44,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1576 transitions. [2021-05-22 02:22:44,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:44,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:44,137 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:44,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-22 02:22:44,137 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:44,137 INFO L82 PathProgramCache]: Analyzing trace with hash 648487496, now seen corresponding path program 2 times [2021-05-22 02:22:44,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:44,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118697065] [2021-05-22 02:22:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:44,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:44,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118697065] [2021-05-22 02:22:44,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118697065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:44,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:44,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:44,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793864455] [2021-05-22 02:22:44,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:44,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:44,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:44,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:44,231 INFO L87 Difference]: Start difference. First operand 480 states and 1576 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:44,319 INFO L93 Difference]: Finished difference Result 785 states and 2433 transitions. [2021-05-22 02:22:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:44,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:44,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:44,321 INFO L225 Difference]: With dead ends: 785 [2021-05-22 02:22:44,321 INFO L226 Difference]: Without dead ends: 737 [2021-05-22 02:22:44,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-05-22 02:22:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 470. [2021-05-22 02:22:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 3.2707889125799574) internal successors, (1534), 469 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:44,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1534 transitions. [2021-05-22 02:22:44,331 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1534 transitions. Word has length 16 [2021-05-22 02:22:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:44,332 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1534 transitions. [2021-05-22 02:22:44,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:44,332 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1534 transitions. [2021-05-22 02:22:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:44,333 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:44,333 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:44,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-22 02:22:44,333 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:44,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash 749508455, now seen corresponding path program 2 times [2021-05-22 02:22:44,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:44,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865771305] [2021-05-22 02:22:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:44,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:44,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865771305] [2021-05-22 02:22:44,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865771305] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:44,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:44,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:44,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514536436] [2021-05-22 02:22:44,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:44,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:44,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:44,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:44,574 INFO L87 Difference]: Start difference. First operand 470 states and 1534 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:44,814 INFO L93 Difference]: Finished difference Result 817 states and 2553 transitions. [2021-05-22 02:22:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:22:44,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:44,816 INFO L225 Difference]: With dead ends: 817 [2021-05-22 02:22:44,816 INFO L226 Difference]: Without dead ends: 769 [2021-05-22 02:22:44,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:22:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-05-22 02:22:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 449. [2021-05-22 02:22:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.2924107142857144) internal successors, (1475), 448 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1475 transitions. [2021-05-22 02:22:44,827 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1475 transitions. Word has length 16 [2021-05-22 02:22:44,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:44,827 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1475 transitions. [2021-05-22 02:22:44,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1475 transitions. [2021-05-22 02:22:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:44,828 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:44,828 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:44,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-22 02:22:44,828 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:44,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:44,829 INFO L82 PathProgramCache]: Analyzing trace with hash 637834109, now seen corresponding path program 3 times [2021-05-22 02:22:44,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:44,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204543227] [2021-05-22 02:22:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:44,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:44,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204543227] [2021-05-22 02:22:44,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204543227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:44,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:44,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:44,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899473616] [2021-05-22 02:22:44,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:44,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:44,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:44,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:44,987 INFO L87 Difference]: Start difference. First operand 449 states and 1475 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:45,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:45,154 INFO L93 Difference]: Finished difference Result 692 states and 2183 transitions. [2021-05-22 02:22:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:45,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:45,156 INFO L225 Difference]: With dead ends: 692 [2021-05-22 02:22:45,156 INFO L226 Difference]: Without dead ends: 652 [2021-05-22 02:22:45,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 187.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:45,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-05-22 02:22:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 436. [2021-05-22 02:22:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.3241379310344827) internal successors, (1446), 435 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1446 transitions. [2021-05-22 02:22:45,164 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1446 transitions. Word has length 16 [2021-05-22 02:22:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:45,164 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1446 transitions. [2021-05-22 02:22:45,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1446 transitions. [2021-05-22 02:22:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:45,165 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:45,165 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:45,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-22 02:22:45,166 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:45,166 INFO L82 PathProgramCache]: Analyzing trace with hash 784334086, now seen corresponding path program 5 times [2021-05-22 02:22:45,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:45,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584370431] [2021-05-22 02:22:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:45,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:45,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584370431] [2021-05-22 02:22:45,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584370431] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:45,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:45,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:45,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802733125] [2021-05-22 02:22:45,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:45,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:45,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:45,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:45,270 INFO L87 Difference]: Start difference. First operand 436 states and 1446 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:45,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:45,486 INFO L93 Difference]: Finished difference Result 736 states and 2320 transitions. [2021-05-22 02:22:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:22:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:45,487 INFO L225 Difference]: With dead ends: 736 [2021-05-22 02:22:45,487 INFO L226 Difference]: Without dead ends: 713 [2021-05-22 02:22:45,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:22:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-05-22 02:22:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 436. [2021-05-22 02:22:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.3241379310344827) internal successors, (1446), 435 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1446 transitions. [2021-05-22 02:22:45,497 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1446 transitions. Word has length 16 [2021-05-22 02:22:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:45,497 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1446 transitions. [2021-05-22 02:22:45,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1446 transitions. [2021-05-22 02:22:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:45,498 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:45,498 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:45,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-22 02:22:45,499 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:45,499 INFO L82 PathProgramCache]: Analyzing trace with hash 797847013, now seen corresponding path program 5 times [2021-05-22 02:22:45,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:45,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467597818] [2021-05-22 02:22:45,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:45,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:45,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467597818] [2021-05-22 02:22:45,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467597818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:45,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:45,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:45,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992580228] [2021-05-22 02:22:45,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:45,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:45,713 INFO L87 Difference]: Start difference. First operand 436 states and 1446 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,033 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2021-05-22 02:22:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:46,061 INFO L93 Difference]: Finished difference Result 764 states and 2422 transitions. [2021-05-22 02:22:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:22:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:46,063 INFO L225 Difference]: With dead ends: 764 [2021-05-22 02:22:46,063 INFO L226 Difference]: Without dead ends: 737 [2021-05-22 02:22:46,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-05-22 02:22:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 436. [2021-05-22 02:22:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.3195402298850576) internal successors, (1444), 435 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1444 transitions. [2021-05-22 02:22:46,072 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1444 transitions. Word has length 16 [2021-05-22 02:22:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:46,072 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1444 transitions. [2021-05-22 02:22:46,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1444 transitions. [2021-05-22 02:22:46,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:46,073 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:46,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:46,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-22 02:22:46,074 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1214532848, now seen corresponding path program 6 times [2021-05-22 02:22:46,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:46,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531846354] [2021-05-22 02:22:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:46,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:46,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531846354] [2021-05-22 02:22:46,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531846354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:46,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:46,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:46,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860096642] [2021-05-22 02:22:46,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:46,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:46,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:46,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:46,139 INFO L87 Difference]: Start difference. First operand 436 states and 1444 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:46,249 INFO L93 Difference]: Finished difference Result 655 states and 2054 transitions. [2021-05-22 02:22:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:46,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:46,251 INFO L225 Difference]: With dead ends: 655 [2021-05-22 02:22:46,251 INFO L226 Difference]: Without dead ends: 632 [2021-05-22 02:22:46,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-05-22 02:22:46,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 436. [2021-05-22 02:22:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.3195402298850576) internal successors, (1444), 435 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1444 transitions. [2021-05-22 02:22:46,260 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1444 transitions. Word has length 16 [2021-05-22 02:22:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:46,260 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1444 transitions. [2021-05-22 02:22:46,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1444 transitions. [2021-05-22 02:22:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:22:46,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:46,262 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:46,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-22 02:22:46,262 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:46,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1154290151, now seen corresponding path program 6 times [2021-05-22 02:22:46,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:46,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941950103] [2021-05-22 02:22:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:22:46,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:46,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941950103] [2021-05-22 02:22:46,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941950103] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:46,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:46,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-22 02:22:46,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441389816] [2021-05-22 02:22:46,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:22:46,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:46,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:22:46,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:46,589 INFO L87 Difference]: Start difference. First operand 436 states and 1444 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:46,788 INFO L93 Difference]: Finished difference Result 635 states and 1984 transitions. [2021-05-22 02:22:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-05-22 02:22:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:46,790 INFO L225 Difference]: With dead ends: 635 [2021-05-22 02:22:46,790 INFO L226 Difference]: Without dead ends: 602 [2021-05-22 02:22:46,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:22:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-05-22 02:22:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 436. [2021-05-22 02:22:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.314942528735632) internal successors, (1442), 435 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1442 transitions. [2021-05-22 02:22:46,799 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1442 transitions. Word has length 16 [2021-05-22 02:22:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:46,799 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1442 transitions. [2021-05-22 02:22:46,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1442 transitions. [2021-05-22 02:22:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:46,800 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:46,801 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:46,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-22 02:22:46,801 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1318202505, now seen corresponding path program 1 times [2021-05-22 02:22:46,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:46,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499571066] [2021-05-22 02:22:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:46,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:46,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499571066] [2021-05-22 02:22:46,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499571066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:46,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:46,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:46,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023094927] [2021-05-22 02:22:46,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:46,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:46,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:46,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:46,821 INFO L87 Difference]: Start difference. First operand 436 states and 1442 transitions. Second operand has 4 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) [2021-05-22 02:22:46,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:46,861 INFO L93 Difference]: Finished difference Result 647 states and 1988 transitions. [2021-05-22 02:22:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:46,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-05-22 02:22:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:46,862 INFO L225 Difference]: With dead ends: 647 [2021-05-22 02:22:46,863 INFO L226 Difference]: Without dead ends: 647 [2021-05-22 02:22:46,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-05-22 02:22:46,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 464. [2021-05-22 02:22:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.326133909287257) internal successors, (1540), 463 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1540 transitions. [2021-05-22 02:22:46,872 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1540 transitions. Word has length 18 [2021-05-22 02:22:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:46,872 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1540 transitions. [2021-05-22 02:22:46,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 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) [2021-05-22 02:22:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1540 transitions. [2021-05-22 02:22:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:46,873 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:46,873 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:46,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-22 02:22:46,873 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:46,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:46,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1664376435, now seen corresponding path program 2 times [2021-05-22 02:22:46,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:46,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722553486] [2021-05-22 02:22:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:46,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:46,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722553486] [2021-05-22 02:22:46,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722553486] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:46,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:46,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:46,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581554426] [2021-05-22 02:22:46,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:46,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:46,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:46,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:46,902 INFO L87 Difference]: Start difference. First operand 464 states and 1540 transitions. Second operand has 4 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) [2021-05-22 02:22:46,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:46,947 INFO L93 Difference]: Finished difference Result 602 states and 1790 transitions. [2021-05-22 02:22:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:46,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-05-22 02:22:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:46,948 INFO L225 Difference]: With dead ends: 602 [2021-05-22 02:22:46,948 INFO L226 Difference]: Without dead ends: 594 [2021-05-22 02:22:46,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:46,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-05-22 02:22:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 420. [2021-05-22 02:22:46,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 3.243436754176611) internal successors, (1359), 419 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1359 transitions. [2021-05-22 02:22:46,957 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1359 transitions. Word has length 18 [2021-05-22 02:22:46,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:46,957 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1359 transitions. [2021-05-22 02:22:46,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 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) [2021-05-22 02:22:46,957 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1359 transitions. [2021-05-22 02:22:46,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:46,958 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:46,958 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:46,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-22 02:22:46,958 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:46,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:46,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1681246645, now seen corresponding path program 1 times [2021-05-22 02:22:46,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:46,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172209594] [2021-05-22 02:22:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:47,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:47,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172209594] [2021-05-22 02:22:47,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172209594] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:47,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:47,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:47,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397196716] [2021-05-22 02:22:47,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:47,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:47,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:47,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:47,009 INFO L87 Difference]: Start difference. First operand 420 states and 1359 transitions. Second operand has 4 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) [2021-05-22 02:22:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:47,088 INFO L93 Difference]: Finished difference Result 602 states and 1832 transitions. [2021-05-22 02:22:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:47,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-05-22 02:22:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:47,090 INFO L225 Difference]: With dead ends: 602 [2021-05-22 02:22:47,090 INFO L226 Difference]: Without dead ends: 602 [2021-05-22 02:22:47,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-05-22 02:22:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 457. [2021-05-22 02:22:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.2214912280701755) internal successors, (1469), 456 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1469 transitions. [2021-05-22 02:22:47,099 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1469 transitions. Word has length 18 [2021-05-22 02:22:47,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:47,099 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1469 transitions. [2021-05-22 02:22:47,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 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) [2021-05-22 02:22:47,099 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1469 transitions. [2021-05-22 02:22:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:47,100 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:47,100 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:47,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-22 02:22:47,101 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:47,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1406905333, now seen corresponding path program 2 times [2021-05-22 02:22:47,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:47,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059829080] [2021-05-22 02:22:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:47,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:47,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059829080] [2021-05-22 02:22:47,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059829080] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:47,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:47,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:47,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397638307] [2021-05-22 02:22:47,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:47,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:47,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:47,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:47,139 INFO L87 Difference]: Start difference. First operand 457 states and 1469 transitions. Second operand has 4 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) [2021-05-22 02:22:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:47,219 INFO L93 Difference]: Finished difference Result 590 states and 1764 transitions. [2021-05-22 02:22:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-05-22 02:22:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:47,220 INFO L225 Difference]: With dead ends: 590 [2021-05-22 02:22:47,220 INFO L226 Difference]: Without dead ends: 582 [2021-05-22 02:22:47,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-05-22 02:22:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 457. [2021-05-22 02:22:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 3.212719298245614) internal successors, (1465), 456 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1465 transitions. [2021-05-22 02:22:47,229 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1465 transitions. Word has length 18 [2021-05-22 02:22:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:47,229 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 1465 transitions. [2021-05-22 02:22:47,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 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) [2021-05-22 02:22:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1465 transitions. [2021-05-22 02:22:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:47,230 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:47,230 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:47,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-22 02:22:47,230 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:47,231 INFO L82 PathProgramCache]: Analyzing trace with hash 506049385, now seen corresponding path program 1 times [2021-05-22 02:22:47,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:47,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762673257] [2021-05-22 02:22:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:47,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:47,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762673257] [2021-05-22 02:22:47,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762673257] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:47,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:47,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:47,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255993755] [2021-05-22 02:22:47,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:47,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:47,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:47,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:47,303 INFO L87 Difference]: Start difference. First operand 457 states and 1465 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-05-22 02:22:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:47,400 INFO L93 Difference]: Finished difference Result 537 states and 1634 transitions. [2021-05-22 02:22:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:47,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2021-05-22 02:22:47,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:47,402 INFO L225 Difference]: With dead ends: 537 [2021-05-22 02:22:47,402 INFO L226 Difference]: Without dead ends: 525 [2021-05-22 02:22:47,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:47,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-05-22 02:22:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 453. [2021-05-22 02:22:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 3.2234513274336285) internal successors, (1457), 452 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1457 transitions. [2021-05-22 02:22:47,411 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1457 transitions. Word has length 18 [2021-05-22 02:22:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:47,411 INFO L482 AbstractCegarLoop]: Abstraction has 453 states and 1457 transitions. [2021-05-22 02:22:47,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-05-22 02:22:47,411 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1457 transitions. [2021-05-22 02:22:47,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:47,412 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:47,412 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:47,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-22 02:22:47,412 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:47,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:47,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1415879781, now seen corresponding path program 3 times [2021-05-22 02:22:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:47,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154369211] [2021-05-22 02:22:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:47,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:47,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154369211] [2021-05-22 02:22:47,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154369211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:47,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:47,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:47,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30646098] [2021-05-22 02:22:47,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:47,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:47,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:47,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:47,432 INFO L87 Difference]: Start difference. First operand 453 states and 1457 transitions. Second operand has 4 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) [2021-05-22 02:22:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:47,471 INFO L93 Difference]: Finished difference Result 549 states and 1641 transitions. [2021-05-22 02:22:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:47,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-05-22 02:22:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:47,473 INFO L225 Difference]: With dead ends: 549 [2021-05-22 02:22:47,473 INFO L226 Difference]: Without dead ends: 549 [2021-05-22 02:22:47,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:47,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-05-22 02:22:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 396. [2021-05-22 02:22:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.1544303797468354) internal successors, (1246), 395 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1246 transitions. [2021-05-22 02:22:47,482 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1246 transitions. Word has length 18 [2021-05-22 02:22:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:47,482 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1246 transitions. [2021-05-22 02:22:47,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 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) [2021-05-22 02:22:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1246 transitions. [2021-05-22 02:22:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:47,483 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:47,483 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:47,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-22 02:22:47,483 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:47,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2075176037, now seen corresponding path program 1 times [2021-05-22 02:22:47,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:47,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944119830] [2021-05-22 02:22:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:47,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:47,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944119830] [2021-05-22 02:22:47,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944119830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:47,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:47,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:47,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405876476] [2021-05-22 02:22:47,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:47,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:47,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:47,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:47,503 INFO L87 Difference]: Start difference. First operand 396 states and 1246 transitions. Second operand has 4 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) [2021-05-22 02:22:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:47,537 INFO L93 Difference]: Finished difference Result 442 states and 1323 transitions. [2021-05-22 02:22:47,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:22:47,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-05-22 02:22:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:47,538 INFO L225 Difference]: With dead ends: 442 [2021-05-22 02:22:47,538 INFO L226 Difference]: Without dead ends: 413 [2021-05-22 02:22:47,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-22 02:22:47,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 396. [2021-05-22 02:22:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.118987341772152) internal successors, (1232), 395 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1232 transitions. [2021-05-22 02:22:47,545 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1232 transitions. Word has length 18 [2021-05-22 02:22:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:47,545 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1232 transitions. [2021-05-22 02:22:47,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 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) [2021-05-22 02:22:47,545 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1232 transitions. [2021-05-22 02:22:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:47,546 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:47,546 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:47,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-22 02:22:47,546 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:47,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:47,547 INFO L82 PathProgramCache]: Analyzing trace with hash -840014107, now seen corresponding path program 3 times [2021-05-22 02:22:47,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:47,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412385659] [2021-05-22 02:22:47,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:47,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412385659] [2021-05-22 02:22:47,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412385659] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:47,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:47,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:47,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015672526] [2021-05-22 02:22:47,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:47,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:47,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:47,593 INFO L87 Difference]: Start difference. First operand 396 states and 1232 transitions. Second operand has 4 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) [2021-05-22 02:22:47,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:47,670 INFO L93 Difference]: Finished difference Result 482 states and 1411 transitions. [2021-05-22 02:22:47,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:47,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-05-22 02:22:47,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:47,671 INFO L225 Difference]: With dead ends: 482 [2021-05-22 02:22:47,671 INFO L226 Difference]: Without dead ends: 482 [2021-05-22 02:22:47,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-05-22 02:22:47,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 359. [2021-05-22 02:22:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.0754189944134076) internal successors, (1101), 358 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:47,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1101 transitions. [2021-05-22 02:22:47,678 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1101 transitions. Word has length 18 [2021-05-22 02:22:47,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:47,678 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1101 transitions. [2021-05-22 02:22:47,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 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) [2021-05-22 02:22:47,679 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1101 transitions. [2021-05-22 02:22:47,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:47,679 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:47,679 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:47,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-22 02:22:47,680 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:47,680 INFO L82 PathProgramCache]: Analyzing trace with hash -197121861, now seen corresponding path program 2 times [2021-05-22 02:22:47,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:47,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303531931] [2021-05-22 02:22:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:47,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:47,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303531931] [2021-05-22 02:22:47,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303531931] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:47,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:47,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:47,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877187903] [2021-05-22 02:22:47,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:47,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:47,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:47,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:47,755 INFO L87 Difference]: Start difference. First operand 359 states and 1101 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-05-22 02:22:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:47,826 INFO L93 Difference]: Finished difference Result 467 states and 1366 transitions. [2021-05-22 02:22:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:47,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2021-05-22 02:22:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:47,828 INFO L225 Difference]: With dead ends: 467 [2021-05-22 02:22:47,828 INFO L226 Difference]: Without dead ends: 467 [2021-05-22 02:22:47,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-22 02:22:47,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 379. [2021-05-22 02:22:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.0714285714285716) internal successors, (1161), 378 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1161 transitions. [2021-05-22 02:22:47,836 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1161 transitions. Word has length 18 [2021-05-22 02:22:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:47,836 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1161 transitions. [2021-05-22 02:22:47,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-05-22 02:22:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1161 transitions. [2021-05-22 02:22:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:47,837 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:47,837 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:47,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-22 02:22:47,837 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:47,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:47,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1939653789, now seen corresponding path program 3 times [2021-05-22 02:22:47,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:47,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347509932] [2021-05-22 02:22:47,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:47,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:47,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347509932] [2021-05-22 02:22:47,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347509932] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:47,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:47,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:47,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744881326] [2021-05-22 02:22:47,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:47,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:47,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:47,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:47,874 INFO L87 Difference]: Start difference. First operand 379 states and 1161 transitions. Second operand has 4 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) [2021-05-22 02:22:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:47,947 INFO L93 Difference]: Finished difference Result 504 states and 1436 transitions. [2021-05-22 02:22:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:47,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-05-22 02:22:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:47,948 INFO L225 Difference]: With dead ends: 504 [2021-05-22 02:22:47,948 INFO L226 Difference]: Without dead ends: 496 [2021-05-22 02:22:47,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-05-22 02:22:47,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 379. [2021-05-22 02:22:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.060846560846561) internal successors, (1157), 378 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1157 transitions. [2021-05-22 02:22:47,955 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1157 transitions. Word has length 18 [2021-05-22 02:22:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:47,955 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1157 transitions. [2021-05-22 02:22:47,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 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) [2021-05-22 02:22:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1157 transitions. [2021-05-22 02:22:47,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:47,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:47,956 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:47,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-22 02:22:47,956 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1583210651, now seen corresponding path program 4 times [2021-05-22 02:22:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:47,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904822168] [2021-05-22 02:22:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:48,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:48,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904822168] [2021-05-22 02:22:48,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904822168] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:48,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:48,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:48,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418500968] [2021-05-22 02:22:48,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:48,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:48,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:48,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:48,026 INFO L87 Difference]: Start difference. First operand 379 states and 1157 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-05-22 02:22:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:48,078 INFO L93 Difference]: Finished difference Result 441 states and 1293 transitions. [2021-05-22 02:22:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:48,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2021-05-22 02:22:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:48,079 INFO L225 Difference]: With dead ends: 441 [2021-05-22 02:22:48,079 INFO L226 Difference]: Without dead ends: 441 [2021-05-22 02:22:48,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-05-22 02:22:48,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 359. [2021-05-22 02:22:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.0083798882681565) internal successors, (1077), 358 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1077 transitions. [2021-05-22 02:22:48,087 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1077 transitions. Word has length 18 [2021-05-22 02:22:48,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:48,087 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1077 transitions. [2021-05-22 02:22:48,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-05-22 02:22:48,087 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1077 transitions. [2021-05-22 02:22:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:48,087 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:48,087 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:48,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-22 02:22:48,088 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:48,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2015137509, now seen corresponding path program 4 times [2021-05-22 02:22:48,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:48,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345381561] [2021-05-22 02:22:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:48,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:48,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345381561] [2021-05-22 02:22:48,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345381561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:48,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:48,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:48,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786994095] [2021-05-22 02:22:48,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:48,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:48,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:48,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:48,124 INFO L87 Difference]: Start difference. First operand 359 states and 1077 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-05-22 02:22:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:48,153 INFO L93 Difference]: Finished difference Result 439 states and 1246 transitions. [2021-05-22 02:22:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:22:48,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2021-05-22 02:22:48,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:48,154 INFO L225 Difference]: With dead ends: 439 [2021-05-22 02:22:48,154 INFO L226 Difference]: Without dead ends: 431 [2021-05-22 02:22:48,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-22 02:22:48,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 359. [2021-05-22 02:22:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.0027932960893855) internal successors, (1075), 358 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1075 transitions. [2021-05-22 02:22:48,161 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1075 transitions. Word has length 18 [2021-05-22 02:22:48,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:48,161 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1075 transitions. [2021-05-22 02:22:48,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-05-22 02:22:48,161 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1075 transitions. [2021-05-22 02:22:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:48,162 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:48,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:48,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-22 02:22:48,162 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:48,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:48,162 INFO L82 PathProgramCache]: Analyzing trace with hash 325544227, now seen corresponding path program 4 times [2021-05-22 02:22:48,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:48,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866609944] [2021-05-22 02:22:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:48,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:48,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866609944] [2021-05-22 02:22:48,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866609944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:48,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:48,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:22:48,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979513653] [2021-05-22 02:22:48,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:22:48,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:48,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:22:48,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:48,229 INFO L87 Difference]: Start difference. First operand 359 states and 1075 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-05-22 02:22:48,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:48,305 INFO L93 Difference]: Finished difference Result 384 states and 1113 transitions. [2021-05-22 02:22:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:22:48,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2021-05-22 02:22:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:48,307 INFO L225 Difference]: With dead ends: 384 [2021-05-22 02:22:48,307 INFO L226 Difference]: Without dead ends: 376 [2021-05-22 02:22:48,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:22:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-22 02:22:48,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 359. [2021-05-22 02:22:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.9972067039106145) internal successors, (1073), 358 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:48,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1073 transitions. [2021-05-22 02:22:48,313 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1073 transitions. Word has length 18 [2021-05-22 02:22:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:48,314 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1073 transitions. [2021-05-22 02:22:48,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-05-22 02:22:48,314 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1073 transitions. [2021-05-22 02:22:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:48,314 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:48,314 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:48,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-22 02:22:48,315 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:48,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:48,315 INFO L82 PathProgramCache]: Analyzing trace with hash 724624817, now seen corresponding path program 5 times [2021-05-22 02:22:48,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:48,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194491615] [2021-05-22 02:22:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-22 02:22:48,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:48,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194491615] [2021-05-22 02:22:48,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194491615] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:22:48,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:22:48,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:22:48,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591818868] [2021-05-22 02:22:48,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:22:48,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:48,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:22:48,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:22:48,333 INFO L87 Difference]: Start difference. First operand 359 states and 1073 transitions. Second operand has 4 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) [2021-05-22 02:22:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:48,370 INFO L93 Difference]: Finished difference Result 386 states and 1114 transitions. [2021-05-22 02:22:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:22:48,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-05-22 02:22:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:48,371 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:22:48,371 INFO L226 Difference]: Without dead ends: 374 [2021-05-22 02:22:48,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:22:48,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-05-22 02:22:48,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 357. [2021-05-22 02:22:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.002808988764045) internal successors, (1069), 356 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1069 transitions. [2021-05-22 02:22:48,384 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1069 transitions. Word has length 18 [2021-05-22 02:22:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:48,384 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1069 transitions. [2021-05-22 02:22:48,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 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) [2021-05-22 02:22:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1069 transitions. [2021-05-22 02:22:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:22:48,386 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:48,386 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:48,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-22 02:22:48,386 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:48,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:48,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1134434440, now seen corresponding path program 1 times [2021-05-22 02:22:48,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:48,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076774602] [2021-05-22 02:22:48,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:48,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:48,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076774602] [2021-05-22 02:22:48,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076774602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:48,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298310671] [2021-05-22 02:22:48,765 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 [2021-05-22 02:22:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:48,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:22:48,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:48,977 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 43 [2021-05-22 02:22:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:49,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298310671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:49,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:49,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:22:49,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039625975] [2021-05-22 02:22:49,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:22:49,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:49,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:22:49,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:22:49,804 INFO L87 Difference]: Start difference. First operand 357 states and 1069 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:50,264 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-05-22 02:22:50,564 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-05-22 02:22:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:50,613 INFO L93 Difference]: Finished difference Result 564 states and 1674 transitions. [2021-05-22 02:22:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:22:50,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:22:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:50,615 INFO L225 Difference]: With dead ends: 564 [2021-05-22 02:22:50,615 INFO L226 Difference]: Without dead ends: 549 [2021-05-22 02:22:50,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1255.3ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:22:50,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-05-22 02:22:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 383. [2021-05-22 02:22:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 3.0104712041884816) internal successors, (1150), 382 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1150 transitions. [2021-05-22 02:22:50,625 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1150 transitions. Word has length 20 [2021-05-22 02:22:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:50,625 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1150 transitions. [2021-05-22 02:22:50,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1150 transitions. [2021-05-22 02:22:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:22:50,626 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:50,626 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:50,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-22 02:22:50,827 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:50,828 INFO L82 PathProgramCache]: Analyzing trace with hash 464235032, now seen corresponding path program 2 times [2021-05-22 02:22:50,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:50,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621217790] [2021-05-22 02:22:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:51,168 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-05-22 02:22:51,317 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-05-22 02:22:51,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:51,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:51,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621217790] [2021-05-22 02:22:51,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621217790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:51,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55243765] [2021-05-22 02:22:51,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:51,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:51,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:51,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:22:51,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:52,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55243765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:52,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:52,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-22 02:22:52,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003321794] [2021-05-22 02:22:52,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:22:52,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:52,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:22:52,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:22:52,394 INFO L87 Difference]: Start difference. First operand 383 states and 1150 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:53,346 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-05-22 02:22:53,584 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2021-05-22 02:22:53,732 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 61 [2021-05-22 02:22:53,874 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-05-22 02:22:54,014 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-05-22 02:22:54,187 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 61 [2021-05-22 02:22:54,338 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2021-05-22 02:22:54,530 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-05-22 02:22:54,687 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-05-22 02:22:54,863 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-05-22 02:22:55,036 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-05-22 02:22:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:55,081 INFO L93 Difference]: Finished difference Result 599 states and 1774 transitions. [2021-05-22 02:22:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:22:55,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:22:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:55,082 INFO L225 Difference]: With dead ends: 599 [2021-05-22 02:22:55,082 INFO L226 Difference]: Without dead ends: 584 [2021-05-22 02:22:55,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 3381.3ms TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:22:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-22 02:22:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 389. [2021-05-22 02:22:55,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.038659793814433) internal successors, (1179), 388 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:55,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1179 transitions. [2021-05-22 02:22:55,089 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1179 transitions. Word has length 20 [2021-05-22 02:22:55,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:55,089 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1179 transitions. [2021-05-22 02:22:55,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1179 transitions. [2021-05-22 02:22:55,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:22:55,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:55,090 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:55,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-22 02:22:55,301 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:55,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:55,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2111156678, now seen corresponding path program 3 times [2021-05-22 02:22:55,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:55,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954946539] [2021-05-22 02:22:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:55,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:55,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954946539] [2021-05-22 02:22:55,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954946539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:55,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972678734] [2021-05-22 02:22:55,655 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 [2021-05-22 02:22:55,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:22:55,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:55,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:22:55,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:56,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972678734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:56,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:56,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-22 02:22:56,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993079893] [2021-05-22 02:22:56,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:22:56,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:56,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:22:56,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:22:56,365 INFO L87 Difference]: Start difference. First operand 389 states and 1179 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:57,055 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-05-22 02:22:57,573 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-05-22 02:22:57,876 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-05-22 02:22:58,059 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-05-22 02:22:58,264 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-05-22 02:22:58,534 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2021-05-22 02:22:58,680 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-05-22 02:22:58,928 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-05-22 02:22:59,281 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2021-05-22 02:22:59,452 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-05-22 02:22:59,593 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-05-22 02:22:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:59,769 INFO L93 Difference]: Finished difference Result 647 states and 1914 transitions. [2021-05-22 02:22:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:22:59,770 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:22:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:59,771 INFO L225 Difference]: With dead ends: 647 [2021-05-22 02:22:59,771 INFO L226 Difference]: Without dead ends: 632 [2021-05-22 02:22:59,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 3515.8ms TimeCoverageRelationStatistics Valid=316, Invalid=1490, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:22:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-05-22 02:22:59,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 402. [2021-05-22 02:22:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.0349127182044886) internal successors, (1217), 401 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1217 transitions. [2021-05-22 02:22:59,779 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1217 transitions. Word has length 20 [2021-05-22 02:22:59,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:59,779 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1217 transitions. [2021-05-22 02:22:59,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1217 transitions. [2021-05-22 02:22:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:22:59,780 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:59,781 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:59,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:59,997 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash 301436920, now seen corresponding path program 4 times [2021-05-22 02:22:59,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:59,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632668938] [2021-05-22 02:22:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:00,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:00,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632668938] [2021-05-22 02:23:00,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632668938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:00,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162447084] [2021-05-22 02:23:00,543 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 [2021-05-22 02:23:00,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:00,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:00,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:23:00,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:01,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162447084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:01,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:01,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-22 02:23:01,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673642384] [2021-05-22 02:23:01,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:23:01,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:01,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:23:01,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:23:01,292 INFO L87 Difference]: Start difference. First operand 402 states and 1217 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:01,753 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-05-22 02:23:02,273 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-05-22 02:23:02,640 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-05-22 02:23:02,789 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-05-22 02:23:02,962 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-05-22 02:23:03,538 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2021-05-22 02:23:03,745 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-05-22 02:23:04,063 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2021-05-22 02:23:04,226 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-05-22 02:23:04,398 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 49 [2021-05-22 02:23:04,655 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-05-22 02:23:04,800 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 43 [2021-05-22 02:23:04,974 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2021-05-22 02:23:05,267 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2021-05-22 02:23:05,497 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-05-22 02:23:05,738 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2021-05-22 02:23:05,905 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-05-22 02:23:06,163 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-05-22 02:23:06,438 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2021-05-22 02:23:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:06,471 INFO L93 Difference]: Finished difference Result 679 states and 2017 transitions. [2021-05-22 02:23:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-22 02:23:06,472 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:23:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:06,473 INFO L225 Difference]: With dead ends: 679 [2021-05-22 02:23:06,473 INFO L226 Difference]: Without dead ends: 664 [2021-05-22 02:23:06,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 5491.0ms TimeCoverageRelationStatistics Valid=507, Invalid=2145, Unknown=0, NotChecked=0, Total=2652 [2021-05-22 02:23:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-05-22 02:23:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 402. [2021-05-22 02:23:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.0349127182044886) internal successors, (1217), 401 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1217 transitions. [2021-05-22 02:23:06,482 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1217 transitions. Word has length 20 [2021-05-22 02:23:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:06,482 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1217 transitions. [2021-05-22 02:23:06,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:06,482 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1217 transitions. [2021-05-22 02:23:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:23:06,483 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:06,483 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:06,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-22 02:23:06,705 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash 812620716, now seen corresponding path program 5 times [2021-05-22 02:23:06,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:06,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745801043] [2021-05-22 02:23:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:06,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:06,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745801043] [2021-05-22 02:23:06,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745801043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:06,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431904467] [2021-05-22 02:23:06,983 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 [2021-05-22 02:23:07,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:07,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:07,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:23:07,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:07,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431904467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:07,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:07,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-22 02:23:07,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25996839] [2021-05-22 02:23:07,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:23:07,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:07,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:23:07,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:23:07,678 INFO L87 Difference]: Start difference. First operand 402 states and 1217 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:08,082 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-05-22 02:23:08,402 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-05-22 02:23:08,545 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-05-22 02:23:08,681 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-05-22 02:23:08,906 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-05-22 02:23:09,044 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-05-22 02:23:09,261 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-05-22 02:23:09,427 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-05-22 02:23:09,605 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-05-22 02:23:09,811 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-05-22 02:23:10,020 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-05-22 02:23:10,228 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-05-22 02:23:10,459 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2021-05-22 02:23:10,645 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-05-22 02:23:10,833 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2021-05-22 02:23:11,139 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-05-22 02:23:11,418 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2021-05-22 02:23:11,689 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-05-22 02:23:12,033 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2021-05-22 02:23:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:12,086 INFO L93 Difference]: Finished difference Result 754 states and 2210 transitions. [2021-05-22 02:23:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:23:12,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:23:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:12,088 INFO L225 Difference]: With dead ends: 754 [2021-05-22 02:23:12,088 INFO L226 Difference]: Without dead ends: 739 [2021-05-22 02:23:12,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 4457.6ms TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:23:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-05-22 02:23:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 424. [2021-05-22 02:23:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.0307328605200947) internal successors, (1282), 423 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1282 transitions. [2021-05-22 02:23:12,097 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1282 transitions. Word has length 20 [2021-05-22 02:23:12,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:12,097 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1282 transitions. [2021-05-22 02:23:12,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1282 transitions. [2021-05-22 02:23:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:23:12,098 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:12,098 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:12,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-22 02:23:12,321 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:12,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1379795916, now seen corresponding path program 6 times [2021-05-22 02:23:12,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:12,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907910316] [2021-05-22 02:23:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:12,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:12,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907910316] [2021-05-22 02:23:12,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907910316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:12,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080771196] [2021-05-22 02:23:12,530 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 [2021-05-22 02:23:12,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:12,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:12,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:23:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:12,996 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-05-22 02:23:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:13,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080771196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:13,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:13,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:23:13,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877701037] [2021-05-22 02:23:13,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:23:13,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:13,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:23:13,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:23:13,278 INFO L87 Difference]: Start difference. First operand 424 states and 1282 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:13,693 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-05-22 02:23:13,986 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-05-22 02:23:14,234 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-05-22 02:23:14,460 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-05-22 02:23:14,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:14,495 INFO L93 Difference]: Finished difference Result 695 states and 2046 transitions. [2021-05-22 02:23:14,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:23:14,496 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:23:14,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:14,498 INFO L225 Difference]: With dead ends: 695 [2021-05-22 02:23:14,498 INFO L226 Difference]: Without dead ends: 680 [2021-05-22 02:23:14,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1509.6ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:23:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-05-22 02:23:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 427. [2021-05-22 02:23:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0375586854460095) internal successors, (1294), 426 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1294 transitions. [2021-05-22 02:23:14,507 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1294 transitions. Word has length 20 [2021-05-22 02:23:14,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:14,507 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1294 transitions. [2021-05-22 02:23:14,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:14,507 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1294 transitions. [2021-05-22 02:23:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:23:14,508 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:14,508 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:14,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:14,731 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:14,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:14,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1032797682, now seen corresponding path program 7 times [2021-05-22 02:23:14,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:14,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362162038] [2021-05-22 02:23:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:15,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362162038] [2021-05-22 02:23:15,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362162038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:15,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447996879] [2021-05-22 02:23:15,024 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 [2021-05-22 02:23:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:23:15,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:15,410 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-05-22 02:23:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447996879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:15,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:15,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:23:15,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783706260] [2021-05-22 02:23:15,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:23:15,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:15,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:23:15,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:23:15,747 INFO L87 Difference]: Start difference. First operand 427 states and 1294 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,911 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-05-22 02:23:16,078 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-05-22 02:23:16,302 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-05-22 02:23:16,570 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-05-22 02:23:17,002 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-05-22 02:23:17,255 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-05-22 02:23:17,468 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-05-22 02:23:17,672 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-05-22 02:23:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:17,721 INFO L93 Difference]: Finished difference Result 740 states and 2183 transitions. [2021-05-22 02:23:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:23:17,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:23:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:17,723 INFO L225 Difference]: With dead ends: 740 [2021-05-22 02:23:17,723 INFO L226 Difference]: Without dead ends: 725 [2021-05-22 02:23:17,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2388.6ms TimeCoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:23:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-05-22 02:23:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 424. [2021-05-22 02:23:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.0307328605200947) internal successors, (1282), 423 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1282 transitions. [2021-05-22 02:23:17,731 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1282 transitions. Word has length 20 [2021-05-22 02:23:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:17,731 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1282 transitions. [2021-05-22 02:23:17,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1282 transitions. [2021-05-22 02:23:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:23:17,732 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:17,732 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:17,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:17,955 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:17,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:17,955 INFO L82 PathProgramCache]: Analyzing trace with hash 695728536, now seen corresponding path program 8 times [2021-05-22 02:23:17,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:17,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052640475] [2021-05-22 02:23:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:18,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:18,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052640475] [2021-05-22 02:23:18,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052640475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:18,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722841131] [2021-05-22 02:23:18,227 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 [2021-05-22 02:23:18,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:18,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:23:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:18,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:18,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722841131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:18,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:18,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:23:18,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167730689] [2021-05-22 02:23:18,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:23:18,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:18,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:23:18,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:23:18,847 INFO L87 Difference]: Start difference. First operand 424 states and 1282 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:19,274 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-05-22 02:23:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:19,432 INFO L93 Difference]: Finished difference Result 644 states and 1920 transitions. [2021-05-22 02:23:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:23:19,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:23:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:19,434 INFO L225 Difference]: With dead ends: 644 [2021-05-22 02:23:19,434 INFO L226 Difference]: Without dead ends: 629 [2021-05-22 02:23:19,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1014.7ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:23:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-05-22 02:23:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 433. [2021-05-22 02:23:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.037037037037037) internal successors, (1312), 432 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1312 transitions. [2021-05-22 02:23:19,439 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1312 transitions. Word has length 20 [2021-05-22 02:23:19,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:19,439 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1312 transitions. [2021-05-22 02:23:19,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1312 transitions. [2021-05-22 02:23:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:23:19,440 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:19,440 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:19,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-05-22 02:23:19,647 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:19,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2000569288, now seen corresponding path program 9 times [2021-05-22 02:23:19,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:19,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847441494] [2021-05-22 02:23:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:19,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:19,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847441494] [2021-05-22 02:23:19,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847441494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:19,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188895691] [2021-05-22 02:23:19,896 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 [2021-05-22 02:23:19,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:23:19,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:23:19,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:20,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188895691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:20,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:20,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:23:20,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086359616] [2021-05-22 02:23:20,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:23:20,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:20,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:23:20,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:23:20,540 INFO L87 Difference]: Start difference. First operand 433 states and 1312 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,833 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-05-22 02:23:21,065 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-05-22 02:23:21,271 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-05-22 02:23:21,558 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-05-22 02:23:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,582 INFO L93 Difference]: Finished difference Result 680 states and 2017 transitions. [2021-05-22 02:23:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:23:21,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:23:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,583 INFO L225 Difference]: With dead ends: 680 [2021-05-22 02:23:21,583 INFO L226 Difference]: Without dead ends: 665 [2021-05-22 02:23:21,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1445.6ms TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:23:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-05-22 02:23:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 430. [2021-05-22 02:23:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.0303030303030303) internal successors, (1300), 429 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1300 transitions. [2021-05-22 02:23:21,591 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1300 transitions. Word has length 20 [2021-05-22 02:23:21,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,591 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1300 transitions. [2021-05-22 02:23:21,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1300 transitions. [2021-05-22 02:23:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:23:21,592 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,592 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:21,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:21,792 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:21,793 INFO L82 PathProgramCache]: Analyzing trace with hash -280993702, now seen corresponding path program 10 times [2021-05-22 02:23:21,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:21,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773026261] [2021-05-22 02:23:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773026261] [2021-05-22 02:23:22,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773026261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:22,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798955893] [2021-05-22 02:23:22,308 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 [2021-05-22 02:23:22,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:22,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:22,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:23:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:22,808 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-05-22 02:23:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798955893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:23,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:23,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-22 02:23:23,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136995606] [2021-05-22 02:23:23,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:23:23,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:23:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:23:23,012 INFO L87 Difference]: Start difference. First operand 430 states and 1300 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,155 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-22 02:23:23,315 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-05-22 02:23:23,534 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-05-22 02:23:23,756 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-05-22 02:23:23,933 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-05-22 02:23:24,105 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-05-22 02:23:24,338 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2021-05-22 02:23:24,490 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-05-22 02:23:24,663 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-05-22 02:23:24,965 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2021-05-22 02:23:25,427 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 78 [2021-05-22 02:23:25,566 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-22 02:23:25,845 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-05-22 02:23:26,132 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-05-22 02:23:26,589 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 74 [2021-05-22 02:23:26,869 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-05-22 02:23:27,085 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-05-22 02:23:27,293 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-05-22 02:23:27,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:27,341 INFO L93 Difference]: Finished difference Result 710 states and 2077 transitions. [2021-05-22 02:23:27,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:23:27,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:23:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:27,342 INFO L225 Difference]: With dead ends: 710 [2021-05-22 02:23:27,342 INFO L226 Difference]: Without dead ends: 695 [2021-05-22 02:23:27,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 4805.3ms TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:23:27,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-05-22 02:23:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 433. [2021-05-22 02:23:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.037037037037037) internal successors, (1312), 432 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1312 transitions. [2021-05-22 02:23:27,349 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1312 transitions. Word has length 20 [2021-05-22 02:23:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:27,349 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1312 transitions. [2021-05-22 02:23:27,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1312 transitions. [2021-05-22 02:23:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:23:27,350 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:27,350 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:27,573 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2131599896, now seen corresponding path program 11 times [2021-05-22 02:23:27,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453748158] [2021-05-22 02:23:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453748158] [2021-05-22 02:23:27,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453748158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:27,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578866235] [2021-05-22 02:23:27,922 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 [2021-05-22 02:23:27,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:23:27,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:27,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:23:27,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:28,314 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-05-22 02:23:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578866235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:28,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:28,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-22 02:23:28,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643221880] [2021-05-22 02:23:28,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:23:28,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:28,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:23:28,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:23:28,564 INFO L87 Difference]: Start difference. First operand 433 states and 1312 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,031 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-05-22 02:23:29,207 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-05-22 02:23:29,584 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-05-22 02:23:29,848 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-05-22 02:23:30,028 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-05-22 02:23:30,392 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2021-05-22 02:23:30,667 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-05-22 02:23:30,825 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-05-22 02:23:31,064 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-05-22 02:23:31,207 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-05-22 02:23:31,374 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-05-22 02:23:31,553 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-05-22 02:23:31,693 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-05-22 02:23:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:31,735 INFO L93 Difference]: Finished difference Result 686 states and 2035 transitions. [2021-05-22 02:23:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:23:31,736 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:23:31,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:31,736 INFO L225 Difference]: With dead ends: 686 [2021-05-22 02:23:31,737 INFO L226 Difference]: Without dead ends: 671 [2021-05-22 02:23:31,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 3475.7ms TimeCoverageRelationStatistics Valid=369, Invalid=1353, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:23:31,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-05-22 02:23:31,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 427. [2021-05-22 02:23:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0305164319248825) internal successors, (1291), 426 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1291 transitions. [2021-05-22 02:23:31,744 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1291 transitions. Word has length 20 [2021-05-22 02:23:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:31,744 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1291 transitions. [2021-05-22 02:23:31,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1291 transitions. [2021-05-22 02:23:31,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:23:31,745 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:31,745 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-05-22 02:23:31,945 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash -616411988, now seen corresponding path program 12 times [2021-05-22 02:23:31,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580329761] [2021-05-22 02:23:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:32,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580329761] [2021-05-22 02:23:32,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580329761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:32,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619957404] [2021-05-22 02:23:32,434 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 [2021-05-22 02:23:32,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:23:32,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:23:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619957404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:33,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:33,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-22 02:23:33,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243157259] [2021-05-22 02:23:33,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:23:33,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:23:33,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:23:33,115 INFO L87 Difference]: Start difference. First operand 427 states and 1291 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,561 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-05-22 02:23:33,804 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-05-22 02:23:33,944 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-05-22 02:23:34,401 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-05-22 02:23:34,541 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-05-22 02:23:34,743 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-05-22 02:23:34,971 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2021-05-22 02:23:35,105 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-05-22 02:23:35,337 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2021-05-22 02:23:35,579 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-05-22 02:23:35,758 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-05-22 02:23:36,080 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-05-22 02:23:36,299 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-05-22 02:23:36,597 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-05-22 02:23:36,818 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-05-22 02:23:36,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:36,861 INFO L93 Difference]: Finished difference Result 754 states and 2221 transitions. [2021-05-22 02:23:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:23:36,862 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:23:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:36,863 INFO L225 Difference]: With dead ends: 754 [2021-05-22 02:23:36,863 INFO L226 Difference]: Without dead ends: 739 [2021-05-22 02:23:36,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 4199.9ms TimeCoverageRelationStatistics Valid=342, Invalid=1380, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:23:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-05-22 02:23:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 436. [2021-05-22 02:23:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.0298850574712644) internal successors, (1318), 435 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1318 transitions. [2021-05-22 02:23:36,869 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1318 transitions. Word has length 20 [2021-05-22 02:23:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:36,869 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1318 transitions. [2021-05-22 02:23:36,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:36,869 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1318 transitions. [2021-05-22 02:23:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:23:36,870 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:36,870 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:37,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-05-22 02:23:37,075 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:37,075 INFO L82 PathProgramCache]: Analyzing trace with hash -668751562, now seen corresponding path program 13 times [2021-05-22 02:23:37,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:37,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247353315] [2021-05-22 02:23:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:37,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:37,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247353315] [2021-05-22 02:23:37,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247353315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:37,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036689600] [2021-05-22 02:23:37,473 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 [2021-05-22 02:23:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:37,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:23:37,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:38,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036689600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:38,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:38,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-22 02:23:38,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692151012] [2021-05-22 02:23:38,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:23:38,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:38,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:23:38,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:23:38,019 INFO L87 Difference]: Start difference. First operand 436 states and 1318 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:38,255 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-05-22 02:23:38,803 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-05-22 02:23:39,070 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-05-22 02:23:39,318 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-05-22 02:23:39,534 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2021-05-22 02:23:39,716 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-05-22 02:23:39,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:39,846 INFO L93 Difference]: Finished difference Result 618 states and 1843 transitions. [2021-05-22 02:23:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:23:39,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:23:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:39,847 INFO L225 Difference]: With dead ends: 618 [2021-05-22 02:23:39,847 INFO L226 Difference]: Without dead ends: 603 [2021-05-22 02:23:39,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 2199.6ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:23:39,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-05-22 02:23:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 452. [2021-05-22 02:23:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.0376940133037693) internal successors, (1370), 451 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1370 transitions. [2021-05-22 02:23:39,853 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1370 transitions. Word has length 20 [2021-05-22 02:23:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:39,853 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1370 transitions. [2021-05-22 02:23:39,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1370 transitions. [2021-05-22 02:23:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:23:39,854 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:39,854 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:40,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-05-22 02:23:40,069 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash 929917910, now seen corresponding path program 14 times [2021-05-22 02:23:40,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:40,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997486776] [2021-05-22 02:23:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:40,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:40,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997486776] [2021-05-22 02:23:40,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997486776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:40,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554304303] [2021-05-22 02:23:40,295 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 [2021-05-22 02:23:40,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:40,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:40,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-22 02:23:40,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:49,543 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:23:49,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:49,744 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:23:49,746 INFO L168 Benchmark]: Toolchain (without parser) took 80581.63 ms. Allocated memory was 352.3 MB in the beginning and 723.5 MB in the end (delta: 371.2 MB). Free memory was 330.3 MB in the beginning and 441.9 MB in the end (delta: -111.6 MB). Peak memory consumption was 440.7 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:49,746 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 352.3 MB. Free memory was 332.8 MB in the beginning and 332.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:23:49,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.05 ms. Allocated memory is still 352.3 MB. Free memory was 330.2 MB in the beginning and 328.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:49,747 INFO L168 Benchmark]: Boogie Preprocessor took 59.47 ms. Allocated memory is still 352.3 MB. Free memory was 328.5 MB in the beginning and 326.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:49,747 INFO L168 Benchmark]: RCFGBuilder took 926.94 ms. Allocated memory is still 352.3 MB. Free memory was 326.5 MB in the beginning and 280.2 MB in the end (delta: 46.3 MB). Peak memory consumption was 47.3 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:49,747 INFO L168 Benchmark]: TraceAbstraction took 79548.87 ms. Allocated memory was 352.3 MB in the beginning and 723.5 MB in the end (delta: 371.2 MB). Free memory was 280.2 MB in the beginning and 441.9 MB in the end (delta: -161.7 MB). Peak memory consumption was 389.2 MB. Max. memory is 16.0 GB. [2021-05-22 02:23:49,747 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 352.3 MB. Free memory was 332.8 MB in the beginning and 332.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 41.05 ms. Allocated memory is still 352.3 MB. Free memory was 330.2 MB in the beginning and 328.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 59.47 ms. Allocated memory is still 352.3 MB. Free memory was 328.5 MB in the beginning and 326.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 926.94 ms. Allocated memory is still 352.3 MB. Free memory was 326.5 MB in the beginning and 280.2 MB in the end (delta: 46.3 MB). Peak memory consumption was 47.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 79548.87 ms. Allocated memory was 352.3 MB in the beginning and 723.5 MB in the end (delta: 371.2 MB). Free memory was 280.2 MB in the beginning and 441.9 MB in the end (delta: -161.7 MB). Peak memory consumption was 389.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...